./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/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 d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:36:36,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:36:36,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:36:36,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:36:36,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:36:36,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:36:36,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:36:36,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:36:36,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:36:36,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:36:36,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:36:36,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:36:36,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:36:36,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:36:36,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:36:36,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:36:36,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:36:36,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:36:36,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:36:36,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:36:36,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:36:36,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:36:36,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:36:36,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:36:36,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:36:36,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:36:36,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:36:36,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:36:36,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:36:36,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:36:36,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:36:36,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:36:36,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:36:36,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:36:36,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:36:36,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:36:36,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:36:36,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:36:36,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:36:36,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:36:36,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:36:36,808 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:36:36,863 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:36:36,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:36:36,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:36:36,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:36:36,866 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:36:36,867 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:36:36,867 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:36:36,867 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:36:36,875 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:36:36,876 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:36:36,877 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:36:36,877 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:36:36,878 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:36:36,878 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:36:36,878 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:36:36,879 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:36:36,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:36:36,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:36:36,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:36:36,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:36:36,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:36:36,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:36:36,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:36:36,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:36:36,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:36:36,882 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:36:36,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:36:36,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:36:36,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:36:36,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:36:36,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:36:36,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:36:36,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:36:36,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:36:36,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:36:36,886 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:36:36,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:36:36,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:36:36,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:36:36,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:36:36,887 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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f [2021-11-19 14:36:37,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:36:37,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:36:37,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:36:37,314 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:36:37,315 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:36:37,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-19 14:36:37,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/data/1a905ee7a/d0ede4421aa74724b7a1a14ce5c61535/FLAGadc81ead9 [2021-11-19 14:36:38,295 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:36:38,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-19 14:36:38,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/data/1a905ee7a/d0ede4421aa74724b7a1a14ce5c61535/FLAGadc81ead9 [2021-11-19 14:36:38,449 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/data/1a905ee7a/d0ede4421aa74724b7a1a14ce5c61535 [2021-11-19 14:36:38,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:36:38,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:36:38,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:36:38,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:36:38,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:36:38,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:36:38" (1/1) ... [2021-11-19 14:36:38,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eba5857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:38, skipping insertion in model container [2021-11-19 14:36:38,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:36:38" (1/1) ... [2021-11-19 14:36:38,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:36:38,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:36:39,145 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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-19 14:36:39,228 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:36:39,250 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 14:36:39,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@fadc81a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:39, skipping insertion in model container [2021-11-19 14:36:39,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:36:39,254 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:36:39,257 INFO L158 Benchmark]: Toolchain (without parser) took 798.79ms. Allocated memory is still 113.2MB. Free memory was 73.5MB in the beginning and 76.3MB in the end (delta: -2.8MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2021-11-19 14:36:39,259 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 113.2MB. Free memory is still 92.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:36:39,261 INFO L158 Benchmark]: CACSL2BoogieTranslator took 793.81ms. Allocated memory is still 113.2MB. Free memory was 73.3MB in the beginning and 76.3MB in the end (delta: -3.0MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2021-11-19 14:36:39,264 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 113.2MB. Free memory is still 92.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 793.81ms. Allocated memory is still 113.2MB. Free memory was 73.3MB in the beginning and 76.3MB in the end (delta: -3.0MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3048]: 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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/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 d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:36:42,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:36:42,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:36:42,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:36:42,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:36:42,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:36:42,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:36:42,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:36:42,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:36:42,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:36:42,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:36:42,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:36:42,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:36:42,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:36:42,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:36:42,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:36:42,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:36:42,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:36:42,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:36:42,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:36:42,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:36:42,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:36:42,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:36:42,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:36:42,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:36:42,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:36:42,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:36:42,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:36:42,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:36:42,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:36:42,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:36:42,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:36:42,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:36:42,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:36:42,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:36:42,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:36:42,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:36:42,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:36:42,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:36:42,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:36:42,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:36:42,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:36:42,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:36:42,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:36:42,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:36:42,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:36:42,414 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:36:42,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:36:42,414 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:36:42,414 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:36:42,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:36:42,415 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:36:42,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:36:42,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:36:42,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:36:42,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:36:42,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:36:42,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:36:42,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:36:42,418 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:36:42,418 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:36:42,419 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:36:42,419 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:36:42,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:36:42,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:36:42,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:36:42,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:36:42,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:36:42,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:36:42,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:36:42,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:36:42,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:36:42,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:36:42,420 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:36:42,421 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:42,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:36:42,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:36:42,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:36:42,421 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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f [2021-11-19 14:36:42,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:36:42,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:36:42,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:36:42,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:36:42,924 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:36:42,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-19 14:36:43,032 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/data/5c0fb872f/99cbbb4c2d7549428a448b3fe814d61d/FLAG6e709e200 [2021-11-19 14:36:43,822 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:36:43,825 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-19 14:36:43,863 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/data/5c0fb872f/99cbbb4c2d7549428a448b3fe814d61d/FLAG6e709e200 [2021-11-19 14:36:43,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/data/5c0fb872f/99cbbb4c2d7549428a448b3fe814d61d [2021-11-19 14:36:43,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:36:43,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:36:43,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:36:43,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:36:43,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:36:43,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:36:43" (1/1) ... [2021-11-19 14:36:43,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@699c496f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:43, skipping insertion in model container [2021-11-19 14:36:43,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:36:43" (1/1) ... [2021-11-19 14:36:43,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:36:44,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:36:44,753 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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-19 14:36:44,827 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:36:44,854 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:36:44,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:36:45,068 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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-19 14:36:45,098 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:36:45,120 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:36:45,220 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_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-19 14:36:45,250 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:36:45,302 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:36:45,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45 WrapperNode [2021-11-19 14:36:45,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:36:45,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:36:45,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:36:45,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:36:45,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (1/1) ... [2021-11-19 14:36:45,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (1/1) ... [2021-11-19 14:36:45,461 INFO L137 Inliner]: procedures = 95, calls = 346, calls flagged for inlining = 30, calls inlined = 26, statements flattened = 830 [2021-11-19 14:36:45,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:36:45,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:36:45,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:36:45,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:36:45,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (1/1) ... [2021-11-19 14:36:45,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (1/1) ... [2021-11-19 14:36:45,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (1/1) ... [2021-11-19 14:36:45,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (1/1) ... [2021-11-19 14:36:45,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (1/1) ... [2021-11-19 14:36:45,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (1/1) ... [2021-11-19 14:36:45,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (1/1) ... [2021-11-19 14:36:45,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:36:45,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:36:45,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:36:45,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:36:45,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (1/1) ... [2021-11-19 14:36:45,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:36:45,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:36:45,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:36:45,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:36:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:36:45,765 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:36:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:36:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 14:36:45,766 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 14:36:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:36:45,766 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:36:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-19 14:36:45,767 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-19 14:36:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:36:45,767 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:36:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:36:45,768 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:36:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:36:45,768 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:36:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:36:45,768 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:36:45,769 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:36:45,769 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:36:45,769 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:36:45,769 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:36:45,769 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:36:45,770 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:36:45,770 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:36:45,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:36:45,770 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:36:45,770 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:36:45,771 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:36:45,771 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:36:45,771 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:36:45,772 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:36:45,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:36:45,772 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:36:45,773 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:36:45,773 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:36:45,773 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:36:45,773 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:36:45,773 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:36:45,774 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:36:45,774 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:36:45,774 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:36:45,774 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:36:45,774 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:36:45,775 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:36:45,775 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:36:45,775 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:36:45,776 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:36:45,776 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:36:45,777 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:36:45,778 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:36:45,779 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-19 14:36:45,780 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-19 14:36:45,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:36:45,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:36:45,780 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:36:45,781 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:36:46,037 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:36:46,040 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:36:47,827 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:36:47,858 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:36:47,858 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 14:36:47,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:36:47 BoogieIcfgContainer [2021-11-19 14:36:47,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:36:47,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:36:47,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:36:47,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:36:47,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:36:43" (1/3) ... [2021-11-19 14:36:47,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669349cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:36:47, skipping insertion in model container [2021-11-19 14:36:47,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:36:45" (2/3) ... [2021-11-19 14:36:47,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669349cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:36:47, skipping insertion in model container [2021-11-19 14:36:47,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:36:47" (3/3) ... [2021-11-19 14:36:47,873 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product30.cil.c [2021-11-19 14:36:47,880 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:36:47,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:36:47,942 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:36:47,951 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 14:36:47,951 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:36:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 609 states, 479 states have (on average 1.6910229645093946) internal successors, (810), 499 states have internal predecessors, (810), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-19 14:36:48,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:36:48,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:48,065 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:48,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:48,073 INFO L85 PathProgramCache]: Analyzing trace with hash -188363818, now seen corresponding path program 1 times [2021-11-19 14:36:48,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:48,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580484035] [2021-11-19 14:36:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:48,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:48,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:48,102 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:48,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:36:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:48,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:36:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:36:49,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:36:49,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:49,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580484035] [2021-11-19 14:36:49,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580484035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:49,412 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:36:49,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:36:49,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312929003] [2021-11-19 14:36:49,415 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:49,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:36:49,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:36:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:36:49,460 INFO L87 Difference]: Start difference. First operand has 609 states, 479 states have (on average 1.6910229645093946) internal successors, (810), 499 states have internal predecessors, (810), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:36:49,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:49,599 INFO L93 Difference]: Finished difference Result 1196 states and 2011 transitions. [2021-11-19 14:36:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:36:49,606 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-19 14:36:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:49,651 INFO L225 Difference]: With dead ends: 1196 [2021-11-19 14:36:49,652 INFO L226 Difference]: Without dead ends: 599 [2021-11-19 14:36:49,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:36:49,675 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:49,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:36:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-19 14:36:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-19 14:36:49,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 472 states have (on average 1.673728813559322) internal successors, (790), 490 states have internal predecessors, (790), 102 states have call successors, (102), 26 states have call predecessors, (102), 24 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 14:36:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 991 transitions. [2021-11-19 14:36:49,878 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 991 transitions. Word has length 99 [2021-11-19 14:36:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:49,880 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 991 transitions. [2021-11-19 14:36:49,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:36:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 991 transitions. [2021-11-19 14:36:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 14:36:49,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:49,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:49,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:50,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:50,125 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1126882367, now seen corresponding path program 1 times [2021-11-19 14:36:50,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:50,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467015962] [2021-11-19 14:36:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:50,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:50,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:50,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:36:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:36:50,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:36:50,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:36:51,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:51,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467015962] [2021-11-19 14:36:51,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467015962] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:36:51,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:36:51,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:36:51,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782522333] [2021-11-19 14:36:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:51,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:36:51,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:51,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:36:51,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:36:51,127 INFO L87 Difference]: Start difference. First operand 599 states and 991 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:36:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:51,332 INFO L93 Difference]: Finished difference Result 1194 states and 1982 transitions. [2021-11-19 14:36:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:36:51,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2021-11-19 14:36:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:51,344 INFO L225 Difference]: With dead ends: 1194 [2021-11-19 14:36:51,345 INFO L226 Difference]: Without dead ends: 603 [2021-11-19 14:36:51,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:36:51,352 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 15 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2919 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:51,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2919 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:36:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-19 14:36:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2021-11-19 14:36:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 475 states have (on average 1.6694736842105262) internal successors, (793), 493 states have internal predecessors, (793), 102 states have call successors, (102), 27 states have call predecessors, (102), 25 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 14:36:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 994 transitions. [2021-11-19 14:36:51,453 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 994 transitions. Word has length 83 [2021-11-19 14:36:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:51,455 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 994 transitions. [2021-11-19 14:36:51,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:36:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 994 transitions. [2021-11-19 14:36:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:36:51,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:51,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:51,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:51,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:51,674 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:51,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash 368759945, now seen corresponding path program 1 times [2021-11-19 14:36:51,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:51,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829377963] [2021-11-19 14:36:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:51,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:51,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:51,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:51,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:36:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:52,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:36:52,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:36:52,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:36:52,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:52,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829377963] [2021-11-19 14:36:52,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829377963] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:36:52,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:36:52,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:36:52,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729116287] [2021-11-19 14:36:52,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:52,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:36:52,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:52,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:36:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:36:52,801 INFO L87 Difference]: Start difference. First operand 603 states and 994 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:36:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:53,188 INFO L93 Difference]: Finished difference Result 1218 states and 2013 transitions. [2021-11-19 14:36:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:36:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2021-11-19 14:36:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:53,207 INFO L225 Difference]: With dead ends: 1218 [2021-11-19 14:36:53,207 INFO L226 Difference]: Without dead ends: 625 [2021-11-19 14:36:53,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 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 14:36:53,216 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 119 mSDsluCounter, 4822 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5808 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:53,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5808 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:36:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-19 14:36:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 616. [2021-11-19 14:36:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 485 states have (on average 1.665979381443299) internal successors, (808), 505 states have internal predecessors, (808), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (105), 97 states have call predecessors, (105), 100 states have call successors, (105) [2021-11-19 14:36:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1016 transitions. [2021-11-19 14:36:53,280 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1016 transitions. Word has length 85 [2021-11-19 14:36:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:53,280 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1016 transitions. [2021-11-19 14:36:53,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:36:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1016 transitions. [2021-11-19 14:36:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 14:36:53,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:53,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:53,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:53,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:53,507 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash -663111298, now seen corresponding path program 1 times [2021-11-19 14:36:53,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:53,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749085282] [2021-11-19 14:36:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:53,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:53,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:53,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:53,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:36:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:53,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:36:53,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:36:54,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:36:54,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:54,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749085282] [2021-11-19 14:36:54,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749085282] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:36:54,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:36:54,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:36:54,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971081636] [2021-11-19 14:36:54,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:54,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:36:54,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:54,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:36:54,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:36:54,609 INFO L87 Difference]: Start difference. First operand 616 states and 1016 transitions. Second operand has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:36:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:55,055 INFO L93 Difference]: Finished difference Result 1238 states and 2046 transitions. [2021-11-19 14:36:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:36:55,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2021-11-19 14:36:55,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:55,065 INFO L225 Difference]: With dead ends: 1238 [2021-11-19 14:36:55,066 INFO L226 Difference]: Without dead ends: 634 [2021-11-19 14:36:55,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:36:55,072 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 105 mSDsluCounter, 4853 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5850 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:55,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5850 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:36:55,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-19 14:36:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 616. [2021-11-19 14:36:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 485 states have (on average 1.665979381443299) internal successors, (808), 505 states have internal predecessors, (808), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (105), 97 states have call predecessors, (105), 100 states have call successors, (105) [2021-11-19 14:36:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1016 transitions. [2021-11-19 14:36:55,114 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1016 transitions. Word has length 86 [2021-11-19 14:36:55,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:55,115 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1016 transitions. [2021-11-19 14:36:55,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:36:55,115 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1016 transitions. [2021-11-19 14:36:55,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:36:55,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:55,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:55,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:55,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:55,340 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:55,341 INFO L85 PathProgramCache]: Analyzing trace with hash 887559175, now seen corresponding path program 1 times [2021-11-19 14:36:55,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:55,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794492548] [2021-11-19 14:36:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:55,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:55,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:55,344 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:55,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:36:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:55,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:36:55,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:36:56,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:36:56,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:56,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794492548] [2021-11-19 14:36:56,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794492548] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:36:56,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:36:56,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:36:56,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447143547] [2021-11-19 14:36:56,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:56,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:36:56,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:56,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:36:56,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:36:56,401 INFO L87 Difference]: Start difference. First operand 616 states and 1016 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:36:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:56,507 INFO L93 Difference]: Finished difference Result 1223 states and 2021 transitions. [2021-11-19 14:36:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:36:56,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 102 [2021-11-19 14:36:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:56,520 INFO L225 Difference]: With dead ends: 1223 [2021-11-19 14:36:56,520 INFO L226 Difference]: Without dead ends: 617 [2021-11-19 14:36:56,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 199 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 14:36:56,525 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 22 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2919 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:56,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2919 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:36:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-19 14:36:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2021-11-19 14:36:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 487 states have (on average 1.6652977412731007) internal successors, (811), 506 states have internal predecessors, (811), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (101), 96 states have call predecessors, (101), 99 states have call successors, (101) [2021-11-19 14:36:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1014 transitions. [2021-11-19 14:36:56,566 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1014 transitions. Word has length 102 [2021-11-19 14:36:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:56,566 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1014 transitions. [2021-11-19 14:36:56,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:36:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1014 transitions. [2021-11-19 14:36:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 14:36:56,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:56,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:56,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:56,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:56,795 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 247259682, now seen corresponding path program 1 times [2021-11-19 14:36:56,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:56,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547401658] [2021-11-19 14:36:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:56,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:56,798 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:56,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:36:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:57,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:36:57,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:36:57,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:36:57,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:57,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547401658] [2021-11-19 14:36:57,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547401658] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:36:57,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:36:57,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:36:57,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426976504] [2021-11-19 14:36:57,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:57,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:36:57,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:57,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:36:57,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:36:57,843 INFO L87 Difference]: Start difference. First operand 617 states and 1014 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:36:58,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:58,188 INFO L93 Difference]: Finished difference Result 1228 states and 2026 transitions. [2021-11-19 14:36:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:36:58,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-19 14:36:58,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:58,197 INFO L225 Difference]: With dead ends: 1228 [2021-11-19 14:36:58,197 INFO L226 Difference]: Without dead ends: 626 [2021-11-19 14:36:58,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:36:58,203 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 104 mSDsluCounter, 4810 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5799 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:58,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5799 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:36:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-19 14:36:58,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 617. [2021-11-19 14:36:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 487 states have (on average 1.6652977412731007) internal successors, (811), 506 states have internal predecessors, (811), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (101), 96 states have call predecessors, (101), 99 states have call successors, (101) [2021-11-19 14:36:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1014 transitions. [2021-11-19 14:36:58,234 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1014 transitions. Word has length 88 [2021-11-19 14:36:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:58,235 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1014 transitions. [2021-11-19 14:36:58,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:36:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1014 transitions. [2021-11-19 14:36:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 14:36:58,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:58,240 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:58,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 14:36:58,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:58,453 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1575256772, now seen corresponding path program 1 times [2021-11-19 14:36:58,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:58,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815657933] [2021-11-19 14:36:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:58,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:58,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:58,456 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:58,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:36:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:58,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:36:58,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:36:59,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:36:59,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:59,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815657933] [2021-11-19 14:36:59,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815657933] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:36:59,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:36:59,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:36:59,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825196493] [2021-11-19 14:36:59,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:59,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:36:59,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:59,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:36:59,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:36:59,560 INFO L87 Difference]: Start difference. First operand 617 states and 1014 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:36:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:59,874 INFO L93 Difference]: Finished difference Result 1248 states and 2064 transitions. [2021-11-19 14:36:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:36:59,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 105 [2021-11-19 14:36:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:59,884 INFO L225 Difference]: With dead ends: 1248 [2021-11-19 14:36:59,884 INFO L226 Difference]: Without dead ends: 646 [2021-11-19 14:36:59,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:36:59,890 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 112 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2763 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:59,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2763 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:36:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-19 14:36:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 637. [2021-11-19 14:36:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 506 states have (on average 1.6600790513833992) internal successors, (840), 525 states have internal predecessors, (840), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-19 14:36:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1042 transitions. [2021-11-19 14:36:59,925 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1042 transitions. Word has length 105 [2021-11-19 14:36:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:59,926 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1042 transitions. [2021-11-19 14:36:59,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:36:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1042 transitions. [2021-11-19 14:36:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:36:59,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:59,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:59,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 14:37:00,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:00,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:00,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:00,155 INFO L85 PathProgramCache]: Analyzing trace with hash -35395587, now seen corresponding path program 1 times [2021-11-19 14:37:00,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:00,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93826568] [2021-11-19 14:37:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:00,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:00,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:00,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:00,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:37:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:37:00,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:37:00,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:37:01,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:01,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93826568] [2021-11-19 14:37:01,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93826568] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:37:01,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:37:01,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:37:01,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597194542] [2021-11-19 14:37:01,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:01,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:37:01,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:01,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:37:01,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:37:01,342 INFO L87 Difference]: Start difference. First operand 637 states and 1042 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:37:01,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:01,624 INFO L93 Difference]: Finished difference Result 1277 states and 2095 transitions. [2021-11-19 14:37:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:37:01,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2021-11-19 14:37:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:01,633 INFO L225 Difference]: With dead ends: 1277 [2021-11-19 14:37:01,633 INFO L226 Difference]: Without dead ends: 655 [2021-11-19 14:37:01,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:37:01,642 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 154 mSDsluCounter, 4738 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5715 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:01,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5715 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:37:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-19 14:37:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 637. [2021-11-19 14:37:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 506 states have (on average 1.6600790513833992) internal successors, (840), 525 states have internal predecessors, (840), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-19 14:37:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1042 transitions. [2021-11-19 14:37:01,690 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1042 transitions. Word has length 106 [2021-11-19 14:37:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:01,691 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1042 transitions. [2021-11-19 14:37:01,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:37:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1042 transitions. [2021-11-19 14:37:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:37:01,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:01,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:01,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:01,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:01,910 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:01,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:01,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1820851569, now seen corresponding path program 1 times [2021-11-19 14:37:01,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:01,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350389710] [2021-11-19 14:37:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:01,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:01,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:01,913 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:01,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:37:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:02,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:37:02,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:37:02,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:37:03,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:03,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350389710] [2021-11-19 14:37:03,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350389710] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:37:03,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:37:03,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:37:03,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207664794] [2021-11-19 14:37:03,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:03,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:37:03,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:03,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:37:03,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:37:03,015 INFO L87 Difference]: Start difference. First operand 637 states and 1042 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:37:03,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:03,402 INFO L93 Difference]: Finished difference Result 1272 states and 2086 transitions. [2021-11-19 14:37:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:37:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2021-11-19 14:37:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:03,432 INFO L225 Difference]: With dead ends: 1272 [2021-11-19 14:37:03,433 INFO L226 Difference]: Without dead ends: 650 [2021-11-19 14:37:03,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:37:03,439 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 112 mSDsluCounter, 5695 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6662 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:03,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6662 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:37:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-19 14:37:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 641. [2021-11-19 14:37:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 510 states have (on average 1.6549019607843136) internal successors, (844), 529 states have internal predecessors, (844), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-19 14:37:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1046 transitions. [2021-11-19 14:37:03,471 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1046 transitions. Word has length 91 [2021-11-19 14:37:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:03,472 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1046 transitions. [2021-11-19 14:37:03,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:37:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1046 transitions. [2021-11-19 14:37:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:37:03,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:03,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:03,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:03,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:03,696 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash -89885338, now seen corresponding path program 1 times [2021-11-19 14:37:03,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:03,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144942395] [2021-11-19 14:37:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:03,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:03,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:03,698 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:03,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:37:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:03,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:37:04,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:37:04,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:37:04,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:04,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144942395] [2021-11-19 14:37:04,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144942395] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:37:04,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:37:04,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:37:04,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709343684] [2021-11-19 14:37:04,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:04,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:37:04,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:04,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:37:04,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:37:04,756 INFO L87 Difference]: Start difference. First operand 641 states and 1046 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:37:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:05,223 INFO L93 Difference]: Finished difference Result 1282 states and 2098 transitions. [2021-11-19 14:37:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:37:05,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 92 [2021-11-19 14:37:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:05,233 INFO L225 Difference]: With dead ends: 1282 [2021-11-19 14:37:05,233 INFO L226 Difference]: Without dead ends: 656 [2021-11-19 14:37:05,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:37:05,239 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 108 mSDsluCounter, 5701 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6670 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:05,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6670 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:37:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-11-19 14:37:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 647. [2021-11-19 14:37:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 516 states have (on average 1.6472868217054264) internal successors, (850), 535 states have internal predecessors, (850), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-19 14:37:05,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1052 transitions. [2021-11-19 14:37:05,300 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1052 transitions. Word has length 92 [2021-11-19 14:37:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:05,301 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1052 transitions. [2021-11-19 14:37:05,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:37:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1052 transitions. [2021-11-19 14:37:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 14:37:05,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:05,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:05,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:05,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:05,524 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2027140278, now seen corresponding path program 1 times [2021-11-19 14:37:05,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:05,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516126116] [2021-11-19 14:37:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:05,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:05,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:05,528 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:05,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:37:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:05,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:37:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:37:06,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:37:06,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:06,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516126116] [2021-11-19 14:37:06,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516126116] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:37:06,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:37:06,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:37:06,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556148127] [2021-11-19 14:37:06,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:06,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:37:06,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:37:06,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:37:06,588 INFO L87 Difference]: Start difference. First operand 647 states and 1052 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:37:07,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:07,056 INFO L93 Difference]: Finished difference Result 1296 states and 2114 transitions. [2021-11-19 14:37:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:37:07,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2021-11-19 14:37:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:07,065 INFO L225 Difference]: With dead ends: 1296 [2021-11-19 14:37:07,066 INFO L226 Difference]: Without dead ends: 664 [2021-11-19 14:37:07,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:37:07,072 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 108 mSDsluCounter, 5701 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6670 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:07,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6670 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:37:07,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-19 14:37:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 655. [2021-11-19 14:37:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 524 states have (on average 1.6374045801526718) internal successors, (858), 543 states have internal predecessors, (858), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-19 14:37:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1060 transitions. [2021-11-19 14:37:07,138 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1060 transitions. Word has length 93 [2021-11-19 14:37:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:07,140 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1060 transitions. [2021-11-19 14:37:07,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:37:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1060 transitions. [2021-11-19 14:37:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 14:37:07,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:07,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:07,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:07,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:07,367 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:07,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1926633720, now seen corresponding path program 1 times [2021-11-19 14:37:07,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:07,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099868314] [2021-11-19 14:37:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:07,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:07,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:07,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:07,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:37:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:37:07,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:37:08,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:37:08,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:08,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099868314] [2021-11-19 14:37:08,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099868314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:08,578 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:08,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:37:08,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672236336] [2021-11-19 14:37:08,579 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:08,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:37:08,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:08,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:37:08,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:37:08,581 INFO L87 Difference]: Start difference. First operand 655 states and 1060 transitions. Second operand has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:37:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:08,994 INFO L93 Difference]: Finished difference Result 1235 states and 1998 transitions. [2021-11-19 14:37:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:37:08,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 110 [2021-11-19 14:37:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:09,004 INFO L225 Difference]: With dead ends: 1235 [2021-11-19 14:37:09,005 INFO L226 Difference]: Without dead ends: 673 [2021-11-19 14:37:09,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 210 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 14:37:09,011 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 100 mSDsluCounter, 6663 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 7640 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:09,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 7640 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:37:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-11-19 14:37:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 662. [2021-11-19 14:37:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 528 states have (on average 1.6325757575757576) internal successors, (862), 549 states have internal predecessors, (862), 103 states have call successors, (103), 29 states have call predecessors, (103), 30 states have return successors, (104), 97 states have call predecessors, (104), 100 states have call successors, (104) [2021-11-19 14:37:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1069 transitions. [2021-11-19 14:37:09,050 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1069 transitions. Word has length 110 [2021-11-19 14:37:09,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:09,050 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1069 transitions. [2021-11-19 14:37:09,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:37:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1069 transitions. [2021-11-19 14:37:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:37:09,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:09,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:09,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:09,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:09,280 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:09,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:09,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1980416747, now seen corresponding path program 1 times [2021-11-19 14:37:09,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:09,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146163249] [2021-11-19 14:37:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:09,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:09,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:09,283 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:09,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:37:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:37:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:37:09,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:37:10,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:10,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146163249] [2021-11-19 14:37:10,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146163249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:10,383 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:10,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:37:10,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681676266] [2021-11-19 14:37:10,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:10,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:37:10,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:37:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:37:10,385 INFO L87 Difference]: Start difference. First operand 662 states and 1069 transitions. Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:37:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:10,802 INFO L93 Difference]: Finished difference Result 1238 states and 2001 transitions. [2021-11-19 14:37:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:37:10,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 96 [2021-11-19 14:37:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:10,812 INFO L225 Difference]: With dead ends: 1238 [2021-11-19 14:37:10,812 INFO L226 Difference]: Without dead ends: 676 [2021-11-19 14:37:10,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 182 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 14:37:10,818 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 181 mSDsluCounter, 5840 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 6819 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:10,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 6819 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:37:10,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-19 14:37:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 669. [2021-11-19 14:37:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 532 states have (on average 1.6278195488721805) internal successors, (866), 555 states have internal predecessors, (866), 104 states have call successors, (104), 29 states have call predecessors, (104), 32 states have return successors, (108), 98 states have call predecessors, (108), 101 states have call successors, (108) [2021-11-19 14:37:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1078 transitions. [2021-11-19 14:37:10,856 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1078 transitions. Word has length 96 [2021-11-19 14:37:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:10,856 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1078 transitions. [2021-11-19 14:37:10,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:37:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1078 transitions. [2021-11-19 14:37:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:37:10,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:10,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:10,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:11,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:11,078 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash 179411902, now seen corresponding path program 1 times [2021-11-19 14:37:11,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:11,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323708] [2021-11-19 14:37:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:11,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:11,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:11,081 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:11,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:37:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:11,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:37:11,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:37:11,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:37:12,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:12,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323708] [2021-11-19 14:37:12,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:12,287 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:12,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:37:12,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226302755] [2021-11-19 14:37:12,288 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:12,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:37:12,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:12,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:37:12,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:37:12,289 INFO L87 Difference]: Start difference. First operand 669 states and 1078 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:37:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:12,552 INFO L93 Difference]: Finished difference Result 1239 states and 2002 transitions. [2021-11-19 14:37:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:37:12,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2021-11-19 14:37:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:12,561 INFO L225 Difference]: With dead ends: 1239 [2021-11-19 14:37:12,562 INFO L226 Difference]: Without dead ends: 677 [2021-11-19 14:37:12,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:37:12,567 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 171 mSDsluCounter, 4756 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 5737 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:12,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 5737 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:37:12,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-11-19 14:37:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 672. [2021-11-19 14:37:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 534 states have (on average 1.6254681647940075) internal successors, (868), 558 states have internal predecessors, (868), 104 states have call successors, (104), 29 states have call predecessors, (104), 33 states have return successors, (109), 98 states have call predecessors, (109), 101 states have call successors, (109) [2021-11-19 14:37:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1081 transitions. [2021-11-19 14:37:12,604 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1081 transitions. Word has length 112 [2021-11-19 14:37:12,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:12,605 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1081 transitions. [2021-11-19 14:37:12,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:37:12,605 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1081 transitions. [2021-11-19 14:37:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:37:12,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:12,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:12,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:12,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:12,834 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:12,834 INFO L85 PathProgramCache]: Analyzing trace with hash 193735004, now seen corresponding path program 1 times [2021-11-19 14:37:12,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:12,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524898604] [2021-11-19 14:37:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:12,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:12,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:12,837 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:12,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:37:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:37:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:37:13,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:37:13,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:13,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524898604] [2021-11-19 14:37:13,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524898604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:13,783 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:13,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:37:13,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325066489] [2021-11-19 14:37:13,784 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:13,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:37:13,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:13,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:37:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:37:13,786 INFO L87 Difference]: Start difference. First operand 672 states and 1081 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:37:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:13,871 INFO L93 Difference]: Finished difference Result 1309 states and 2110 transitions. [2021-11-19 14:37:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:37:13,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 112 [2021-11-19 14:37:13,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:13,879 INFO L225 Difference]: With dead ends: 1309 [2021-11-19 14:37:13,879 INFO L226 Difference]: Without dead ends: 622 [2021-11-19 14:37:13,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:37:13,884 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 37 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:13,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1947 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:37:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-19 14:37:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2021-11-19 14:37:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 491 states have (on average 1.6089613034623218) internal successors, (790), 510 states have internal predecessors, (790), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 14:37:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 991 transitions. [2021-11-19 14:37:13,933 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 991 transitions. Word has length 112 [2021-11-19 14:37:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:13,934 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 991 transitions. [2021-11-19 14:37:13,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:37:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 991 transitions. [2021-11-19 14:37:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:37:13,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:13,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:13,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:14,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:14,154 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2042780641, now seen corresponding path program 1 times [2021-11-19 14:37:14,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:14,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103534210] [2021-11-19 14:37:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:14,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:14,156 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:14,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:37:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:14,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:37:14,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:37:14,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:37:15,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:15,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103534210] [2021-11-19 14:37:15,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103534210] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:15,048 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:15,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:37:15,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782455520] [2021-11-19 14:37:15,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:15,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:37:15,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:15,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:37:15,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:37:15,051 INFO L87 Difference]: Start difference. First operand 622 states and 991 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:37:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:15,252 INFO L93 Difference]: Finished difference Result 1270 states and 2015 transitions. [2021-11-19 14:37:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:37:15,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2021-11-19 14:37:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:15,260 INFO L225 Difference]: With dead ends: 1270 [2021-11-19 14:37:15,260 INFO L226 Difference]: Without dead ends: 619 [2021-11-19 14:37:15,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:37:15,264 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 193 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:15,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1858 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:37:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-19 14:37:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2021-11-19 14:37:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 488 states have (on average 1.5881147540983607) internal successors, (775), 506 states have internal predecessors, (775), 102 states have call successors, (102), 30 states have call predecessors, (102), 28 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 14:37:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 976 transitions. [2021-11-19 14:37:15,296 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 976 transitions. Word has length 114 [2021-11-19 14:37:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:15,297 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 976 transitions. [2021-11-19 14:37:15,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:37:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 976 transitions. [2021-11-19 14:37:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:37:15,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:15,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:15,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:15,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:15,522 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:15,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1190422952, now seen corresponding path program 1 times [2021-11-19 14:37:15,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:15,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263277093] [2021-11-19 14:37:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:15,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:15,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:15,524 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:15,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:37:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:37:15,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:37:16,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:37:17,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:17,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263277093] [2021-11-19 14:37:17,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263277093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:17,058 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:17,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-19 14:37:17,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587626410] [2021-11-19 14:37:17,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:17,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:37:17,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:37:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:37:17,061 INFO L87 Difference]: Start difference. First operand 619 states and 976 transitions. Second operand has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 6 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 14:37:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:27,436 INFO L93 Difference]: Finished difference Result 3127 states and 5126 transitions. [2021-11-19 14:37:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:37:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 6 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 115 [2021-11-19 14:37:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:27,476 INFO L225 Difference]: With dead ends: 3127 [2021-11-19 14:37:27,477 INFO L226 Difference]: Without dead ends: 2569 [2021-11-19 14:37:27,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:37:27,484 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 5682 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 5230 mSolverCounterSat, 1663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5876 SdHoareTripleChecker+Valid, 3202 SdHoareTripleChecker+Invalid, 6893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1663 IncrementalHoareTripleChecker+Valid, 5230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:27,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5876 Valid, 3202 Invalid, 6893 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1663 Valid, 5230 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2021-11-19 14:37:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-11-19 14:37:27,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2320. [2021-11-19 14:37:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 1816 states have (on average 1.625) internal successors, (2951), 1875 states have internal predecessors, (2951), 412 states have call successors, (412), 91 states have call predecessors, (412), 91 states have return successors, (437), 380 states have call predecessors, (437), 407 states have call successors, (437) [2021-11-19 14:37:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3800 transitions. [2021-11-19 14:37:27,755 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3800 transitions. Word has length 115 [2021-11-19 14:37:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:27,756 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 3800 transitions. [2021-11-19 14:37:27,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 6 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 14:37:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3800 transitions. [2021-11-19 14:37:27,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:37:27,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:27,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:27,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:27,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:27,986 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash 790900229, now seen corresponding path program 1 times [2021-11-19 14:37:27,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:27,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81617755] [2021-11-19 14:37:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:27,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:27,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:27,989 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:27,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:37:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:28,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:37:28,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:37:30,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:37:33,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:33,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81617755] [2021-11-19 14:37:33,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81617755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:33,196 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:33,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 14:37:33,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371923763] [2021-11-19 14:37:33,197 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:33,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:37:33,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:33,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:37:33,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:37:33,200 INFO L87 Difference]: Start difference. First operand 2320 states and 3800 transitions. Second operand has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 14:38:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:09,973 INFO L93 Difference]: Finished difference Result 5404 states and 8955 transitions. [2021-11-19 14:38:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:38:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 137 [2021-11-19 14:38:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:10,011 INFO L225 Difference]: With dead ends: 5404 [2021-11-19 14:38:10,012 INFO L226 Difference]: Without dead ends: 3145 [2021-11-19 14:38:10,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:38:10,028 INFO L933 BasicCegarLoop]: 1177 mSDtfsCounter, 2336 mSDsluCounter, 3051 mSDsCounter, 0 mSdLazyCounter, 7634 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2433 SdHoareTripleChecker+Valid, 4228 SdHoareTripleChecker+Invalid, 8201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 7634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:10,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2433 Valid, 4228 Invalid, 8201 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [567 Valid, 7634 Invalid, 0 Unknown, 0 Unchecked, 36.0s Time] [2021-11-19 14:38:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2021-11-19 14:38:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2655. [2021-11-19 14:38:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2025 states have (on average 1.6138271604938272) internal successors, (3268), 2106 states have internal predecessors, (3268), 533 states have call successors, (533), 92 states have call predecessors, (533), 96 states have return successors, (571), 495 states have call predecessors, (571), 528 states have call successors, (571) [2021-11-19 14:38:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 4372 transitions. [2021-11-19 14:38:10,265 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 4372 transitions. Word has length 137 [2021-11-19 14:38:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:10,266 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 4372 transitions. [2021-11-19 14:38:10,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 14:38:10,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 4372 transitions. [2021-11-19 14:38:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 14:38:10,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:10,277 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:38:10,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:10,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:38:10,505 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:10,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1357450765, now seen corresponding path program 1 times [2021-11-19 14:38:10,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:10,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409822833] [2021-11-19 14:38:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:10,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:10,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:10,508 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:10,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:38:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:38:11,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:38:11,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:38:13,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:13,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409822833] [2021-11-19 14:38:13,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409822833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:38:13,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [227324985] [2021-11-19 14:38:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:13,031 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:38:13,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:38:13,032 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:38:13,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:38:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:13,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:38:13,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:38:13,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 14:38:14,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [227324985] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:38:14,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:38:14,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 8, 3] total 15 [2021-11-19 14:38:14,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000744892] [2021-11-19 14:38:14,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:14,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:38:14,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:38:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:38:14,294 INFO L87 Difference]: Start difference. First operand 2655 states and 4372 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:38:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:14,592 INFO L93 Difference]: Finished difference Result 7821 states and 13094 transitions. [2021-11-19 14:38:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:38:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 192 [2021-11-19 14:38:14,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:14,644 INFO L225 Difference]: With dead ends: 7821 [2021-11-19 14:38:14,645 INFO L226 Difference]: Without dead ends: 5228 [2021-11-19 14:38:14,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 751 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:38:14,667 INFO L933 BasicCegarLoop]: 1093 mSDtfsCounter, 935 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:14,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 1991 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:38:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2021-11-19 14:38:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 5200. [2021-11-19 14:38:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5200 states, 3974 states have (on average 1.6202818319073982) internal successors, (6439), 4128 states have internal predecessors, (6439), 1038 states have call successors, (1038), 174 states have call predecessors, (1038), 187 states have return successors, (1177), 975 states have call predecessors, (1177), 1030 states have call successors, (1177) [2021-11-19 14:38:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 8654 transitions. [2021-11-19 14:38:15,104 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 8654 transitions. Word has length 192 [2021-11-19 14:38:15,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:15,104 INFO L470 AbstractCegarLoop]: Abstraction has 5200 states and 8654 transitions. [2021-11-19 14:38:15,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:38:15,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 8654 transitions. [2021-11-19 14:38:15,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:38:15,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:15,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:38:15,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:15,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:15,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:38:15,542 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1239894389, now seen corresponding path program 1 times [2021-11-19 14:38:15,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:15,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531630532] [2021-11-19 14:38:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:15,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:15,545 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:15,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:38:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:15,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:38:15,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:38:16,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:38:16,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:16,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531630532] [2021-11-19 14:38:16,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531630532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:38:16,685 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:38:16,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-19 14:38:16,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664979174] [2021-11-19 14:38:16,686 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:16,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:38:16,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:16,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:38:16,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:38:16,689 INFO L87 Difference]: Start difference. First operand 5200 states and 8654 transitions. Second operand has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:38:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:17,694 INFO L93 Difference]: Finished difference Result 9899 states and 16443 transitions. [2021-11-19 14:38:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:38:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 137 [2021-11-19 14:38:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:17,749 INFO L225 Difference]: With dead ends: 9899 [2021-11-19 14:38:17,749 INFO L226 Difference]: Without dead ends: 4760 [2021-11-19 14:38:17,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:38:17,772 INFO L933 BasicCegarLoop]: 1111 mSDtfsCounter, 1393 mSDsluCounter, 3928 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 5039 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:17,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1400 Valid, 5039 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:38:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2021-11-19 14:38:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 4384. [2021-11-19 14:38:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 3427 states have (on average 1.574555004377006) internal successors, (5396), 3509 states have internal predecessors, (5396), 773 states have call successors, (773), 174 states have call predecessors, (773), 183 states have return successors, (936), 744 states have call predecessors, (936), 761 states have call successors, (936) [2021-11-19 14:38:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 7105 transitions. [2021-11-19 14:38:18,163 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 7105 transitions. Word has length 137 [2021-11-19 14:38:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:18,163 INFO L470 AbstractCegarLoop]: Abstraction has 4384 states and 7105 transitions. [2021-11-19 14:38:18,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:38:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 7105 transitions. [2021-11-19 14:38:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 14:38:18,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:18,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:38:18,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:18,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:38:18,389 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1269447124, now seen corresponding path program 1 times [2021-11-19 14:38:18,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:18,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565862255] [2021-11-19 14:38:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:18,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:18,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:18,392 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:18,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:38:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:18,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:38:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:38:19,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:38:20,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:20,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565862255] [2021-11-19 14:38:20,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565862255] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:38:20,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:38:20,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2021-11-19 14:38:20,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429536634] [2021-11-19 14:38:20,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:20,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:38:20,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:20,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:38:20,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:38:20,332 INFO L87 Difference]: Start difference. First operand 4384 states and 7105 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 14:38:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:27,706 INFO L93 Difference]: Finished difference Result 16349 states and 27839 transitions. [2021-11-19 14:38:27,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:38:27,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 138 [2021-11-19 14:38:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:27,866 INFO L225 Difference]: With dead ends: 16349 [2021-11-19 14:38:27,866 INFO L226 Difference]: Without dead ends: 11680 [2021-11-19 14:38:27,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:38:27,901 INFO L933 BasicCegarLoop]: 1155 mSDtfsCounter, 3412 mSDsluCounter, 2064 mSDsCounter, 0 mSdLazyCounter, 2986 mSolverCounterSat, 1130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3587 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1130 IncrementalHoareTripleChecker+Valid, 2986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:27,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3587 Valid, 3219 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1130 Valid, 2986 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-11-19 14:38:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11680 states. [2021-11-19 14:38:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11680 to 9310. [2021-11-19 14:38:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9310 states, 7067 states have (on average 1.5803028159049102) internal successors, (11168), 7301 states have internal predecessors, (11168), 1857 states have call successors, (1857), 312 states have call predecessors, (1857), 385 states have return successors, (2592), 1816 states have call predecessors, (2592), 1835 states have call successors, (2592) [2021-11-19 14:38:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9310 states to 9310 states and 15617 transitions. [2021-11-19 14:38:28,961 INFO L78 Accepts]: Start accepts. Automaton has 9310 states and 15617 transitions. Word has length 138 [2021-11-19 14:38:28,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:28,962 INFO L470 AbstractCegarLoop]: Abstraction has 9310 states and 15617 transitions. [2021-11-19 14:38:28,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 14:38:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 9310 states and 15617 transitions. [2021-11-19 14:38:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:38:28,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:28,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:38:28,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-19 14:38:29,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:38:29,191 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash -691217576, now seen corresponding path program 1 times [2021-11-19 14:38:29,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:29,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624657512] [2021-11-19 14:38:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:29,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:29,194 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:29,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:38:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:29,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:38:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:38:29,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:38:30,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:30,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624657512] [2021-11-19 14:38:30,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624657512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:38:30,595 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:38:30,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:38:30,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834433814] [2021-11-19 14:38:30,595 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:30,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:38:30,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:38:30,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:38:30,597 INFO L87 Difference]: Start difference. First operand 9310 states and 15617 transitions. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 14:38:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:42,227 INFO L93 Difference]: Finished difference Result 31666 states and 55496 transitions. [2021-11-19 14:38:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:38:42,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) Word has length 139 [2021-11-19 14:38:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:42,436 INFO L225 Difference]: With dead ends: 31666 [2021-11-19 14:38:42,436 INFO L226 Difference]: Without dead ends: 22417 [2021-11-19 14:38:42,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:38:42,639 INFO L933 BasicCegarLoop]: 1716 mSDtfsCounter, 3690 mSDsluCounter, 3113 mSDsCounter, 0 mSdLazyCounter, 6969 mSolverCounterSat, 1030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3792 SdHoareTripleChecker+Valid, 4829 SdHoareTripleChecker+Invalid, 7999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1030 IncrementalHoareTripleChecker+Valid, 6969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:42,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3792 Valid, 4829 Invalid, 7999 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1030 Valid, 6969 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-11-19 14:38:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22417 states. [2021-11-19 14:38:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22417 to 20721. [2021-11-19 14:38:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20721 states, 15615 states have (on average 1.58059558117195) internal successors, (24681), 16211 states have internal predecessors, (24681), 4233 states have call successors, (4233), 709 states have call predecessors, (4233), 872 states have return successors, (6063), 4100 states have call predecessors, (6063), 4205 states have call successors, (6063) [2021-11-19 14:38:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20721 states to 20721 states and 34977 transitions. [2021-11-19 14:38:44,527 INFO L78 Accepts]: Start accepts. Automaton has 20721 states and 34977 transitions. Word has length 139 [2021-11-19 14:38:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:44,528 INFO L470 AbstractCegarLoop]: Abstraction has 20721 states and 34977 transitions. [2021-11-19 14:38:44,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 14:38:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20721 states and 34977 transitions. [2021-11-19 14:38:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:38:44,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:44,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:38:44,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:44,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:38:44,758 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:44,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:44,758 INFO L85 PathProgramCache]: Analyzing trace with hash 733590794, now seen corresponding path program 1 times [2021-11-19 14:38:44,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:44,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137680871] [2021-11-19 14:38:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:44,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:44,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:44,764 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:44,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:38:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:38:45,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:38:45,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:38:46,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:46,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137680871] [2021-11-19 14:38:46,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137680871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:38:46,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:38:46,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 14:38:46,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013763195] [2021-11-19 14:38:46,508 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:46,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:38:46,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:38:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:38:46,509 INFO L87 Difference]: Start difference. First operand 20721 states and 34977 transitions. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 14:39:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:04,291 INFO L93 Difference]: Finished difference Result 72215 states and 132598 transitions. [2021-11-19 14:39:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:39:04,293 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) Word has length 145 [2021-11-19 14:39:04,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:04,903 INFO L225 Difference]: With dead ends: 72215 [2021-11-19 14:39:04,903 INFO L226 Difference]: Without dead ends: 51447 [2021-11-19 14:39:05,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:39:05,305 INFO L933 BasicCegarLoop]: 2024 mSDtfsCounter, 5912 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 8644 mSolverCounterSat, 2659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6020 SdHoareTripleChecker+Valid, 4893 SdHoareTripleChecker+Invalid, 11303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2659 IncrementalHoareTripleChecker+Valid, 8644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:05,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6020 Valid, 4893 Invalid, 11303 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2659 Valid, 8644 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2021-11-19 14:39:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51447 states. [2021-11-19 14:39:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51447 to 38892. [2021-11-19 14:39:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38892 states, 28267 states have (on average 1.5533307390243039) internal successors, (43908), 29668 states have internal predecessors, (43908), 8986 states have call successors, (8986), 1133 states have call predecessors, (8986), 1638 states have return successors, (13559), 9008 states have call predecessors, (13559), 8942 states have call successors, (13559) [2021-11-19 14:39:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38892 states to 38892 states and 66453 transitions. [2021-11-19 14:39:10,358 INFO L78 Accepts]: Start accepts. Automaton has 38892 states and 66453 transitions. Word has length 145 [2021-11-19 14:39:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:10,359 INFO L470 AbstractCegarLoop]: Abstraction has 38892 states and 66453 transitions. [2021-11-19 14:39:10,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 14:39:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 38892 states and 66453 transitions. [2021-11-19 14:39:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 14:39:10,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:10,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:39:10,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:10,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:10,591 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:10,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash 602258613, now seen corresponding path program 1 times [2021-11-19 14:39:10,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:10,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340563175] [2021-11-19 14:39:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:10,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:10,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:10,593 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:10,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:39:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:11,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:39:11,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:39:11,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:39:12,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:12,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340563175] [2021-11-19 14:39:12,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340563175] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:12,304 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:12,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:39:12,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277485268] [2021-11-19 14:39:12,304 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:12,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:39:12,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:39:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:39:12,306 INFO L87 Difference]: Start difference. First operand 38892 states and 66453 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 14:39:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:28,746 INFO L93 Difference]: Finished difference Result 142609 states and 269850 transitions. [2021-11-19 14:39:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:39:28,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 146 [2021-11-19 14:39:28,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:30,199 INFO L225 Difference]: With dead ends: 142609 [2021-11-19 14:39:30,199 INFO L226 Difference]: Without dead ends: 103778 [2021-11-19 14:39:30,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:30,660 INFO L933 BasicCegarLoop]: 1897 mSDtfsCounter, 4767 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 2990 mSolverCounterSat, 1603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4875 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1603 IncrementalHoareTripleChecker+Valid, 2990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:30,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4875 Valid, 3037 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1603 Valid, 2990 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-19 14:39:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103778 states. [2021-11-19 14:39:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103778 to 87466. [2021-11-19 14:39:40,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87466 states, 60461 states have (on average 1.5295975918360596) internal successors, (92481), 64173 states have internal predecessors, (92481), 23546 states have call successors, (23546), 2003 states have call predecessors, (23546), 3458 states have return successors, (36863), 24133 states have call predecessors, (36863), 23470 states have call successors, (36863) [2021-11-19 14:39:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87466 states to 87466 states and 152890 transitions. [2021-11-19 14:39:41,592 INFO L78 Accepts]: Start accepts. Automaton has 87466 states and 152890 transitions. Word has length 146 [2021-11-19 14:39:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:41,593 INFO L470 AbstractCegarLoop]: Abstraction has 87466 states and 152890 transitions. [2021-11-19 14:39:41,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 14:39:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 87466 states and 152890 transitions. [2021-11-19 14:39:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:39:41,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:41,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:39:41,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:41,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:41,824 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash 174987143, now seen corresponding path program 1 times [2021-11-19 14:39:41,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:41,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777001300] [2021-11-19 14:39:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:41,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:41,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:41,834 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:41,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5c2c61-f220-4c8c-b1c6-5fa8d114aeeb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:39:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:42,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:39:42,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:39:42,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:39:43,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:43,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777001300] [2021-11-19 14:39:43,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777001300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:43,249 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:43,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:39:43,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185621306] [2021-11-19 14:39:43,250 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:43,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:39:43,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:43,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:39:43,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:39:43,251 INFO L87 Difference]: Start difference. First operand 87466 states and 152890 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30)