./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH --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 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:26:23,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:26:23,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:26:23,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:26:23,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:26:23,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:26:23,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:26:23,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:26:23,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:26:23,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:26:23,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:26:23,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:26:23,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:26:23,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:26:23,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:26:23,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:26:23,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:26:23,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:26:23,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:26:23,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:26:23,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:26:23,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:26:23,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:26:23,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:26:23,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:26:23,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:26:23,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:26:23,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:26:23,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:26:23,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:26:23,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:26:23,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:26:23,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:26:23,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:26:23,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:26:23,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:26:23,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:26:23,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:26:23,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:26:23,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:26:23,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:26:23,813 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:26:23,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:26:23,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:26:23,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:26:23,841 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:26:23,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:26:23,842 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:26:23,842 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:26:23,842 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:26:23,843 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:26:23,843 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:26:23,843 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:26:23,844 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:26:23,844 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:26:23,844 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:26:23,845 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:26:23,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:26:23,846 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:26:23,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:26:23,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:26:23,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:26:23,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:26:23,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:26:23,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:26:23,848 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:26:23,848 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:26:23,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:26:23,849 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:26:23,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:26:23,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:26:23,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:26:23,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:26:23,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:26:23,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:26:23,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:26:23,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:26:23,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:26:23,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:26:23,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:26:23,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:26:23,852 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_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d [2021-11-03 05:26:24,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:26:24,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:26:24,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:26:24,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:26:24,165 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:26:24,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-03 05:26:24,252 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/data/1772d84e4/b33f51059075441b9e8cca87acd58e51/FLAGfcdd9142f [2021-11-03 05:26:24,923 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:26:24,923 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-03 05:26:24,951 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/data/1772d84e4/b33f51059075441b9e8cca87acd58e51/FLAGfcdd9142f [2021-11-03 05:26:25,118 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/data/1772d84e4/b33f51059075441b9e8cca87acd58e51 [2021-11-03 05:26:25,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:26:25,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:26:25,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:26:25,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:26:25,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:26:25,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:26:25" (1/1) ... [2021-11-03 05:26:25,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2c65a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:25, skipping insertion in model container [2021-11-03 05:26:25,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:26:25" (1/1) ... [2021-11-03 05:26:25,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:26:25,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:26:25,855 WARN L228 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_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-03 05:26:26,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:26:26,024 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) [2021-11-03 05:26:26,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@339d3c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:26, skipping insertion in model container [2021-11-03 05:26:26,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:26:26,026 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:26:26,030 INFO L168 Benchmark]: Toolchain (without parser) took 904.29 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 66.9 MB in the beginning and 103.1 MB in the end (delta: -36.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-03 05:26:26,032 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 102.8 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:26:26,034 INFO L168 Benchmark]: CACSL2BoogieTranslator took 901.10 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 66.6 MB in the beginning and 103.1 MB in the end (delta: -36.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:26:26,037 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 102.8 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 901.10 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 66.6 MB in the beginning and 103.1 MB in the end (delta: -36.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1668]: 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_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH --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 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:26:28,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:26:28,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:26:28,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:26:28,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:26:28,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:26:28,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:26:28,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:26:28,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:26:28,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:26:28,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:26:28,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:26:28,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:26:28,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:26:28,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:26:28,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:26:28,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:26:28,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:26:28,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:26:28,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:26:28,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:26:28,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:26:28,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:26:28,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:26:28,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:26:28,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:26:28,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:26:28,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:26:28,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:26:28,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:26:28,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:26:28,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:26:28,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:26:28,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:26:28,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:26:28,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:26:28,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:26:28,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:26:28,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:26:28,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:26:28,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:26:28,690 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:26:28,741 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:26:28,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:26:28,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:26:28,744 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:26:28,744 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:26:28,744 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:26:28,744 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:26:28,745 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:26:28,746 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:26:28,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:26:28,749 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:26:28,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:26:28,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:26:28,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:26:28,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:26:28,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:26:28,750 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:26:28,751 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:26:28,751 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:26:28,751 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:26:28,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:26:28,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:26:28,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:26:28,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:26:28,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:26:28,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:26:28,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:26:28,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:26:28,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:26:28,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:26:28,754 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:26:28,754 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:26:28,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:26:28,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:26:28,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:26:28,756 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_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d [2021-11-03 05:26:29,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:26:29,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:26:29,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:26:29,150 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:26:29,150 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:26:29,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-03 05:26:29,215 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/data/fce1c2ac9/be6bd3b4e12f4ab48377a12a0d7a2cb7/FLAG230f5b482 [2021-11-03 05:26:30,021 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:26:30,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-03 05:26:30,056 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/data/fce1c2ac9/be6bd3b4e12f4ab48377a12a0d7a2cb7/FLAG230f5b482 [2021-11-03 05:26:30,118 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/data/fce1c2ac9/be6bd3b4e12f4ab48377a12a0d7a2cb7 [2021-11-03 05:26:30,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:26:30,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:26:30,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:26:30,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:26:30,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:26:30,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:26:30" (1/1) ... [2021-11-03 05:26:30,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a50f4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:30, skipping insertion in model container [2021-11-03 05:26:30,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:26:30" (1/1) ... [2021-11-03 05:26:30,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:26:30,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:26:30,794 WARN L228 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_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-03 05:26:30,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:26:30,865 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:26:30,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:26:30,994 WARN L228 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_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-03 05:26:31,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:26:31,062 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:26:31,135 WARN L228 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_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-03 05:26:31,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:26:31,244 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:26:31,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31 WrapperNode [2021-11-03 05:26:31,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:26:31,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:26:31,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:26:31,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:26:31,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (1/1) ... [2021-11-03 05:26:31,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (1/1) ... [2021-11-03 05:26:31,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:26:31,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:26:31,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:26:31,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:26:31,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (1/1) ... [2021-11-03 05:26:31,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (1/1) ... [2021-11-03 05:26:31,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (1/1) ... [2021-11-03 05:26:31,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (1/1) ... [2021-11-03 05:26:31,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (1/1) ... [2021-11-03 05:26:32,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (1/1) ... [2021-11-03 05:26:32,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (1/1) ... [2021-11-03 05:26:32,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:26:32,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:26:32,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:26:32,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:26:32,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (1/1) ... [2021-11-03 05:26:32,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:26:32,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:26:32,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:26:32,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:26:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:26:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:26:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:26:32,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:26:46,667 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:26:46,668 INFO L299 CfgBuilder]: Removed 1113 assume(true) statements. [2021-11-03 05:26:46,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:26:46 BoogieIcfgContainer [2021-11-03 05:26:46,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:26:46,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:26:46,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:26:46,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:26:46,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:26:30" (1/3) ... [2021-11-03 05:26:46,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7ec043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:26:46, skipping insertion in model container [2021-11-03 05:26:46,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:31" (2/3) ... [2021-11-03 05:26:46,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7ec043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:26:46, skipping insertion in model container [2021-11-03 05:26:46,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:26:46" (3/3) ... [2021-11-03 05:26:46,750 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product20.cil.c [2021-11-03 05:26:46,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:26:46,756 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 05:26:46,853 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:26:46,859 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 [2021-11-03 05:26:46,859 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 05:26:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 4767 states, 4761 states have (on average 1.8886788489813064) internal successors, (8992), 4766 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:47,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:26:47,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:47,005 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:26:47,006 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:26:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash 120180799, now seen corresponding path program 1 times [2021-11-03 05:26:47,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:26:47,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374814811] [2021-11-03 05:26:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:47,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:26:47,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:26:47,038 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:26:47,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:26:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:47,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:26:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:26:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:47,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:26:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:47,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:26:47,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374814811] [2021-11-03 05:26:47,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374814811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:26:47,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:26:47,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:26:47,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665402653] [2021-11-03 05:26:47,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:26:47,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:26:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:26:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:26:47,741 INFO L87 Difference]: Start difference. First operand has 4767 states, 4761 states have (on average 1.8886788489813064) internal successors, (8992), 4766 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:47,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:47,937 INFO L93 Difference]: Finished difference Result 4786 states and 9015 transitions. [2021-11-03 05:26:47,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:26:47,938 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 05:26:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:47,996 INFO L225 Difference]: With dead ends: 4786 [2021-11-03 05:26:47,996 INFO L226 Difference]: Without dead ends: 4763 [2021-11-03 05:26:48,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:26:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2021-11-03 05:26:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 4763. [2021-11-03 05:26:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4758 states have (on average 1.8873476250525432) internal successors, (8980), 4762 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 8980 transitions. [2021-11-03 05:26:48,303 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 8980 transitions. Word has length 36 [2021-11-03 05:26:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:48,305 INFO L470 AbstractCegarLoop]: Abstraction has 4763 states and 8980 transitions. [2021-11-03 05:26:48,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:48,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 8980 transitions. [2021-11-03 05:26:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 05:26:48,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:48,318 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:26:48,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:26:48,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:26:48,537 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:26:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash -812482130, now seen corresponding path program 1 times [2021-11-03 05:26:48,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:26:48,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187282228] [2021-11-03 05:26:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:48,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:26:48,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:26:48,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:26:48,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:26:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:48,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:26:48,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:26:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:48,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:26:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:49,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:26:49,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187282228] [2021-11-03 05:26:49,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187282228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:26:49,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:26:49,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:26:49,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456705404] [2021-11-03 05:26:49,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:26:49,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:26:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:26:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:26:49,106 INFO L87 Difference]: Start difference. First operand 4763 states and 8980 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:49,740 INFO L93 Difference]: Finished difference Result 14209 states and 26797 transitions. [2021-11-03 05:26:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:26:49,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-03 05:26:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:49,813 INFO L225 Difference]: With dead ends: 14209 [2021-11-03 05:26:49,813 INFO L226 Difference]: Without dead ends: 9459 [2021-11-03 05:26:49,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:26:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9459 states. [2021-11-03 05:26:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9459 to 4763. [2021-11-03 05:26:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4758 states have (on average 1.885876418663304) internal successors, (8973), 4762 states have internal predecessors, (8973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 8973 transitions. [2021-11-03 05:26:50,102 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 8973 transitions. Word has length 38 [2021-11-03 05:26:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:50,102 INFO L470 AbstractCegarLoop]: Abstraction has 4763 states and 8973 transitions. [2021-11-03 05:26:50,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 8973 transitions. [2021-11-03 05:26:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 05:26:50,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:50,115 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:26:50,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:26:50,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:26:50,333 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:26:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash -733664911, now seen corresponding path program 1 times [2021-11-03 05:26:50,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:26:50,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177011431] [2021-11-03 05:26:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:50,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:26:50,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:26:50,337 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:26:50,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:26:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:50,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:26:50,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:26:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:50,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:26:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:51,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:26:51,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177011431] [2021-11-03 05:26:51,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177011431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:26:51,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:26:51,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:26:51,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258921068] [2021-11-03 05:26:51,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:26:51,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:26:51,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:26:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:26:51,028 INFO L87 Difference]: Start difference. First operand 4763 states and 8973 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:52,932 INFO L93 Difference]: Finished difference Result 32816 states and 61863 transitions. [2021-11-03 05:26:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:26:52,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-03 05:26:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:53,105 INFO L225 Difference]: With dead ends: 32816 [2021-11-03 05:26:53,105 INFO L226 Difference]: Without dead ends: 28075 [2021-11-03 05:26:53,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:26:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28075 states. [2021-11-03 05:26:53,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28075 to 4741. [2021-11-03 05:26:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4736 states have (on average 1.8838682432432432) internal successors, (8922), 4740 states have internal predecessors, (8922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 8922 transitions. [2021-11-03 05:26:53,606 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 8922 transitions. Word has length 44 [2021-11-03 05:26:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:53,606 INFO L470 AbstractCegarLoop]: Abstraction has 4741 states and 8922 transitions. [2021-11-03 05:26:53,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 8922 transitions. [2021-11-03 05:26:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 05:26:53,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:53,608 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:26:53,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:26:53,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:26:53,823 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:26:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:53,823 INFO L85 PathProgramCache]: Analyzing trace with hash 810670128, now seen corresponding path program 1 times [2021-11-03 05:26:53,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:26:53,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982674087] [2021-11-03 05:26:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:53,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:26:53,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:26:53,829 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:26:53,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:26:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:54,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:26:54,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:26:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:54,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:26:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:54,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:26:54,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982674087] [2021-11-03 05:26:54,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982674087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:26:54,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:26:54,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:26:54,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976845255] [2021-11-03 05:26:54,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:26:54,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:26:54,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:26:54,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:26:54,620 INFO L87 Difference]: Start difference. First operand 4741 states and 8922 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:55,286 INFO L93 Difference]: Finished difference Result 14120 states and 26601 transitions. [2021-11-03 05:26:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:26:55,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 05:26:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:55,317 INFO L225 Difference]: With dead ends: 14120 [2021-11-03 05:26:55,317 INFO L226 Difference]: Without dead ends: 9401 [2021-11-03 05:26:55,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:26:55,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9401 states. [2021-11-03 05:26:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9401 to 4741. [2021-11-03 05:26:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4736 states have (on average 1.8815456081081081) internal successors, (8911), 4740 states have internal predecessors, (8911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 8911 transitions. [2021-11-03 05:26:55,707 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 8911 transitions. Word has length 46 [2021-11-03 05:26:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:55,707 INFO L470 AbstractCegarLoop]: Abstraction has 4741 states and 8911 transitions. [2021-11-03 05:26:55,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 8911 transitions. [2021-11-03 05:26:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:26:55,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:55,710 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:26:55,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:26:55,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:26:55,926 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:26:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:55,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1242331333, now seen corresponding path program 1 times [2021-11-03 05:26:55,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:26:55,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306030121] [2021-11-03 05:26:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:55,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:26:55,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:26:55,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:26:55,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:26:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:26:56,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:26:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:56,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:26:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:56,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:26:56,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306030121] [2021-11-03 05:26:56,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306030121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:26:56,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:26:56,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:26:56,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004841299] [2021-11-03 05:26:56,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:26:56,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:26:56,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:26:56,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:26:56,719 INFO L87 Difference]: Start difference. First operand 4741 states and 8911 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:00,555 INFO L93 Difference]: Finished difference Result 51395 states and 96855 transitions. [2021-11-03 05:27:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:27:00,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 05:27:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:00,705 INFO L225 Difference]: With dead ends: 51395 [2021-11-03 05:27:00,706 INFO L226 Difference]: Without dead ends: 46679 [2021-11-03 05:27:00,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:27:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46679 states. [2021-11-03 05:27:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46679 to 4743. [2021-11-03 05:27:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4738 states have (on average 1.880118193330519) internal successors, (8908), 4742 states have internal predecessors, (8908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 8908 transitions. [2021-11-03 05:27:01,359 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 8908 transitions. Word has length 52 [2021-11-03 05:27:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:01,359 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 8908 transitions. [2021-11-03 05:27:01,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 8908 transitions. [2021-11-03 05:27:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:27:01,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:01,367 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:01,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:01,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:01,574 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1253895560, now seen corresponding path program 1 times [2021-11-03 05:27:01,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:01,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56879106] [2021-11-03 05:27:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:01,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:01,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:01,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:01,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:27:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:02,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:27:02,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:02,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:02,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:02,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56879106] [2021-11-03 05:27:02,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56879106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:02,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:02,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:27:02,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343374824] [2021-11-03 05:27:02,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:27:02,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:27:02,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:27:02,406 INFO L87 Difference]: Start difference. First operand 4743 states and 8908 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:05,363 INFO L93 Difference]: Finished difference Result 51363 states and 96776 transitions. [2021-11-03 05:27:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:27:05,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 05:27:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:05,515 INFO L225 Difference]: With dead ends: 51363 [2021-11-03 05:27:05,515 INFO L226 Difference]: Without dead ends: 46647 [2021-11-03 05:27:05,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:27:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46647 states. [2021-11-03 05:27:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46647 to 4747. [2021-11-03 05:27:06,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4747 states, 4742 states have (on average 1.8791649093209617) internal successors, (8911), 4746 states have internal predecessors, (8911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4747 states to 4747 states and 8911 transitions. [2021-11-03 05:27:06,048 INFO L78 Accepts]: Start accepts. Automaton has 4747 states and 8911 transitions. Word has length 54 [2021-11-03 05:27:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:06,049 INFO L470 AbstractCegarLoop]: Abstraction has 4747 states and 8911 transitions. [2021-11-03 05:27:06,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4747 states and 8911 transitions. [2021-11-03 05:27:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:27:06,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:06,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:06,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:06,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:06,267 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:06,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1866497349, now seen corresponding path program 1 times [2021-11-03 05:27:06,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:06,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822839060] [2021-11-03 05:27:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:06,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:06,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:06,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:06,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:27:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:06,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:27:06,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:06,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:06,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:06,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822839060] [2021-11-03 05:27:06,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822839060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:06,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:06,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:27:06,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954621986] [2021-11-03 05:27:06,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:27:06,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:06,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:27:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:27:06,971 INFO L87 Difference]: Start difference. First operand 4747 states and 8911 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:07,197 INFO L93 Difference]: Finished difference Result 9442 states and 17753 transitions. [2021-11-03 05:27:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:27:07,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-03 05:27:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:07,206 INFO L225 Difference]: With dead ends: 9442 [2021-11-03 05:27:07,207 INFO L226 Difference]: Without dead ends: 4726 [2021-11-03 05:27:07,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:27:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-11-03 05:27:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4726. [2021-11-03 05:27:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4726 states, 4721 states have (on average 1.8794746875661936) internal successors, (8873), 4725 states have internal predecessors, (8873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4726 states to 4726 states and 8873 transitions. [2021-11-03 05:27:07,457 INFO L78 Accepts]: Start accepts. Automaton has 4726 states and 8873 transitions. Word has length 56 [2021-11-03 05:27:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:07,457 INFO L470 AbstractCegarLoop]: Abstraction has 4726 states and 8873 transitions. [2021-11-03 05:27:07,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4726 states and 8873 transitions. [2021-11-03 05:27:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:27:07,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:07,459 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:07,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:07,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:07,682 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1123537053, now seen corresponding path program 1 times [2021-11-03 05:27:07,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:07,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456047814] [2021-11-03 05:27:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:07,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:07,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:07,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:07,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:27:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:08,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:27:08,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:08,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:08,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:08,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456047814] [2021-11-03 05:27:08,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456047814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:08,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:08,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:27:08,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760822597] [2021-11-03 05:27:08,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:27:08,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:08,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:27:08,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:27:08,481 INFO L87 Difference]: Start difference. First operand 4726 states and 8873 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:08,839 INFO L93 Difference]: Finished difference Result 9386 states and 17656 transitions. [2021-11-03 05:27:08,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:27:08,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 05:27:08,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:08,847 INFO L225 Difference]: With dead ends: 9386 [2021-11-03 05:27:08,848 INFO L226 Difference]: Without dead ends: 4701 [2021-11-03 05:27:08,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:27:08,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2021-11-03 05:27:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 4701. [2021-11-03 05:27:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4701 states, 4696 states have (on average 1.8801107325383304) internal successors, (8829), 4700 states have internal predecessors, (8829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4701 states to 4701 states and 8829 transitions. [2021-11-03 05:27:09,123 INFO L78 Accepts]: Start accepts. Automaton has 4701 states and 8829 transitions. Word has length 57 [2021-11-03 05:27:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:09,123 INFO L470 AbstractCegarLoop]: Abstraction has 4701 states and 8829 transitions. [2021-11-03 05:27:09,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:09,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4701 states and 8829 transitions. [2021-11-03 05:27:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 05:27:09,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:09,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:09,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:09,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:09,351 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash 479309484, now seen corresponding path program 1 times [2021-11-03 05:27:09,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:09,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681024286] [2021-11-03 05:27:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:09,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:09,354 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:09,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:27:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:09,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:27:09,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:10,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:10,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:10,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681024286] [2021-11-03 05:27:10,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681024286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:10,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:10,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:27:10,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399569425] [2021-11-03 05:27:10,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:27:10,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:27:10,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:27:10,181 INFO L87 Difference]: Start difference. First operand 4701 states and 8829 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:10,381 INFO L93 Difference]: Finished difference Result 9361 states and 17612 transitions. [2021-11-03 05:27:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:27:10,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 05:27:10,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:10,387 INFO L225 Difference]: With dead ends: 9361 [2021-11-03 05:27:10,387 INFO L226 Difference]: Without dead ends: 4698 [2021-11-03 05:27:10,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:27:10,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2021-11-03 05:27:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4698. [2021-11-03 05:27:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4693 states have (on average 1.8796079266993395) internal successors, (8821), 4697 states have internal predecessors, (8821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 8821 transitions. [2021-11-03 05:27:10,729 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 8821 transitions. Word has length 58 [2021-11-03 05:27:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:10,730 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 8821 transitions. [2021-11-03 05:27:10,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 8821 transitions. [2021-11-03 05:27:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:27:10,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:10,732 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:10,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:10,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:10,948 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:10,948 INFO L85 PathProgramCache]: Analyzing trace with hash -999754595, now seen corresponding path program 1 times [2021-11-03 05:27:10,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:10,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28912448] [2021-11-03 05:27:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:10,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:10,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:10,950 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:10,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:27:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:27:11,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:11,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:11,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:11,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28912448] [2021-11-03 05:27:11,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28912448] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:11,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:11,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:27:11,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125397238] [2021-11-03 05:27:11,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:27:11,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:11,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:27:11,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:27:11,789 INFO L87 Difference]: Start difference. First operand 4698 states and 8821 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:12,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:12,165 INFO L93 Difference]: Finished difference Result 9352 states and 17594 transitions. [2021-11-03 05:27:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:27:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 05:27:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:12,173 INFO L225 Difference]: With dead ends: 9352 [2021-11-03 05:27:12,173 INFO L226 Difference]: Without dead ends: 4696 [2021-11-03 05:27:12,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:27:12,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2021-11-03 05:27:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 4696. [2021-11-03 05:27:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 4691 states have (on average 1.8791302494137712) internal successors, (8815), 4695 states have internal predecessors, (8815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 8815 transitions. [2021-11-03 05:27:12,424 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 8815 transitions. Word has length 59 [2021-11-03 05:27:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:12,425 INFO L470 AbstractCegarLoop]: Abstraction has 4696 states and 8815 transitions. [2021-11-03 05:27:12,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 8815 transitions. [2021-11-03 05:27:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:27:12,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:12,427 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:12,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:12,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:12,631 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1314151215, now seen corresponding path program 1 times [2021-11-03 05:27:12,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:12,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715303127] [2021-11-03 05:27:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:12,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:12,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:12,633 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:12,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:27:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:13,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:27:13,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:13,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:13,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:13,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715303127] [2021-11-03 05:27:13,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715303127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:13,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:13,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:27:13,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087060581] [2021-11-03 05:27:13,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:27:13,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:27:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:27:13,531 INFO L87 Difference]: Start difference. First operand 4696 states and 8815 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:13,884 INFO L93 Difference]: Finished difference Result 9345 states and 17579 transitions. [2021-11-03 05:27:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:27:13,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:27:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:13,890 INFO L225 Difference]: With dead ends: 9345 [2021-11-03 05:27:13,890 INFO L226 Difference]: Without dead ends: 4694 [2021-11-03 05:27:13,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:27:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2021-11-03 05:27:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4694. [2021-11-03 05:27:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4689 states have (on average 1.8786521646406484) internal successors, (8809), 4693 states have internal predecessors, (8809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 8809 transitions. [2021-11-03 05:27:14,166 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 8809 transitions. Word has length 60 [2021-11-03 05:27:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:14,166 INFO L470 AbstractCegarLoop]: Abstraction has 4694 states and 8809 transitions. [2021-11-03 05:27:14,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 8809 transitions. [2021-11-03 05:27:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:27:14,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:14,168 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:14,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:14,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:14,369 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1263226962, now seen corresponding path program 1 times [2021-11-03 05:27:14,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:14,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027651268] [2021-11-03 05:27:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:14,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:14,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:14,372 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:14,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:27:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:14,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:27:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:15,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:15,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:15,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027651268] [2021-11-03 05:27:15,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027651268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:15,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:15,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:27:15,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645378903] [2021-11-03 05:27:15,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:27:15,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:27:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:27:15,585 INFO L87 Difference]: Start difference. First operand 4694 states and 8809 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:16,666 INFO L93 Difference]: Finished difference Result 13000 states and 24474 transitions. [2021-11-03 05:27:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:27:16,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 05:27:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:16,687 INFO L225 Difference]: With dead ends: 13000 [2021-11-03 05:27:16,687 INFO L226 Difference]: Without dead ends: 10621 [2021-11-03 05:27:16,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:27:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10621 states. [2021-11-03 05:27:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10621 to 6300. [2021-11-03 05:27:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6300 states, 6295 states have (on average 1.8811755361397935) internal successors, (11842), 6299 states have internal predecessors, (11842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 11842 transitions. [2021-11-03 05:27:17,081 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 11842 transitions. Word has length 61 [2021-11-03 05:27:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:17,081 INFO L470 AbstractCegarLoop]: Abstraction has 6300 states and 11842 transitions. [2021-11-03 05:27:17,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 11842 transitions. [2021-11-03 05:27:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 05:27:17,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:17,086 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:17,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:17,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:17,301 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:17,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1157513391, now seen corresponding path program 1 times [2021-11-03 05:27:17,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:17,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572702797] [2021-11-03 05:27:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:17,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:17,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:17,306 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:17,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:27:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:18,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:27:18,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:18,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:18,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:18,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572702797] [2021-11-03 05:27:18,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572702797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:18,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:18,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 05:27:18,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766114834] [2021-11-03 05:27:18,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:27:18,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:18,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:27:18,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:27:18,518 INFO L87 Difference]: Start difference. First operand 6300 states and 11842 transitions. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:19,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:19,089 INFO L93 Difference]: Finished difference Result 12024 states and 22406 transitions. [2021-11-03 05:27:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:27:19,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-03 05:27:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:19,098 INFO L225 Difference]: With dead ends: 12024 [2021-11-03 05:27:19,098 INFO L226 Difference]: Without dead ends: 6905 [2021-11-03 05:27:19,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:27:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6905 states. [2021-11-03 05:27:19,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6905 to 4673. [2021-11-03 05:27:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4668 states have (on average 1.8723221936589547) internal successors, (8740), 4672 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 8740 transitions. [2021-11-03 05:27:19,312 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 8740 transitions. Word has length 80 [2021-11-03 05:27:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:19,313 INFO L470 AbstractCegarLoop]: Abstraction has 4673 states and 8740 transitions. [2021-11-03 05:27:19,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 8740 transitions. [2021-11-03 05:27:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 05:27:19,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:19,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:19,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:19,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:19,516 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1737547905, now seen corresponding path program 1 times [2021-11-03 05:27:19,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:19,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146950474] [2021-11-03 05:27:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:19,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:19,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:19,518 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:19,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:27:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:20,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:27:20,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:20,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:20,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:20,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146950474] [2021-11-03 05:27:20,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146950474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:20,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:20,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:27:20,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119966377] [2021-11-03 05:27:20,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:27:20,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:27:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:27:20,579 INFO L87 Difference]: Start difference. First operand 4673 states and 8740 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:22,688 INFO L93 Difference]: Finished difference Result 17261 states and 32392 transitions. [2021-11-03 05:27:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:27:22,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-03 05:27:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:22,707 INFO L225 Difference]: With dead ends: 17261 [2021-11-03 05:27:22,707 INFO L226 Difference]: Without dead ends: 12642 [2021-11-03 05:27:22,715 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:27:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12642 states. [2021-11-03 05:27:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12642 to 4673. [2021-11-03 05:27:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4668 states have (on average 1.835904027420737) internal successors, (8570), 4672 states have internal predecessors, (8570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 8570 transitions. [2021-11-03 05:27:22,984 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 8570 transitions. Word has length 81 [2021-11-03 05:27:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:22,984 INFO L470 AbstractCegarLoop]: Abstraction has 4673 states and 8570 transitions. [2021-11-03 05:27:22,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 8570 transitions. [2021-11-03 05:27:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 05:27:22,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:22,989 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:23,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:23,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:23,207 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:23,207 INFO L85 PathProgramCache]: Analyzing trace with hash 146436845, now seen corresponding path program 1 times [2021-11-03 05:27:23,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:23,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375581354] [2021-11-03 05:27:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:23,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:23,209 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:23,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:27:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:23,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:27:23,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:24,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:24,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:24,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375581354] [2021-11-03 05:27:24,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375581354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:24,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:24,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:27:24,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38493589] [2021-11-03 05:27:24,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:27:24,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:27:24,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:27:24,438 INFO L87 Difference]: Start difference. First operand 4673 states and 8570 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:25,947 INFO L93 Difference]: Finished difference Result 13200 states and 24429 transitions. [2021-11-03 05:27:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:27:25,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-03 05:27:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:25,959 INFO L225 Difference]: With dead ends: 13200 [2021-11-03 05:27:25,959 INFO L226 Difference]: Without dead ends: 8599 [2021-11-03 05:27:25,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:27:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8599 states. [2021-11-03 05:27:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8599 to 4605. [2021-11-03 05:27:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4600 states have (on average 1.836086956521739) internal successors, (8446), 4604 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 8446 transitions. [2021-11-03 05:27:26,227 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 8446 transitions. Word has length 89 [2021-11-03 05:27:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:26,227 INFO L470 AbstractCegarLoop]: Abstraction has 4605 states and 8446 transitions. [2021-11-03 05:27:26,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 8446 transitions. [2021-11-03 05:27:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-03 05:27:26,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:26,230 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:26,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:26,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:26,430 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1245971405, now seen corresponding path program 1 times [2021-11-03 05:27:26,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:26,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569245866] [2021-11-03 05:27:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:26,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:26,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:26,433 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:26,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:27:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:27,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:27:27,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:27,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:27,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:27,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569245866] [2021-11-03 05:27:27,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569245866] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:27,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:27,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:27:27,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157946296] [2021-11-03 05:27:27,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:27:27,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:27,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:27:27,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:27:27,622 INFO L87 Difference]: Start difference. First operand 4605 states and 8446 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:30,023 INFO L93 Difference]: Finished difference Result 18222 states and 33634 transitions. [2021-11-03 05:27:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:27:30,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-03 05:27:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:30,043 INFO L225 Difference]: With dead ends: 18222 [2021-11-03 05:27:30,043 INFO L226 Difference]: Without dead ends: 13688 [2021-11-03 05:27:30,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:27:30,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13688 states. [2021-11-03 05:27:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13688 to 4613. [2021-11-03 05:27:30,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4608 states have (on average 1.8346354166666667) internal successors, (8454), 4612 states have internal predecessors, (8454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 8454 transitions. [2021-11-03 05:27:30,474 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 8454 transitions. Word has length 91 [2021-11-03 05:27:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:30,474 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 8454 transitions. [2021-11-03 05:27:30,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 8454 transitions. [2021-11-03 05:27:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 05:27:30,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:30,476 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:30,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:30,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:30,682 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:30,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash 996695726, now seen corresponding path program 1 times [2021-11-03 05:27:30,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:30,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508079441] [2021-11-03 05:27:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:30,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:30,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:30,684 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:30,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:27:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:27:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:31,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:31,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:31,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508079441] [2021-11-03 05:27:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508079441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:31,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:31,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:27:31,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582694779] [2021-11-03 05:27:31,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:27:31,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:31,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:27:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:27:31,846 INFO L87 Difference]: Start difference. First operand 4613 states and 8454 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:40,994 INFO L93 Difference]: Finished difference Result 12076 states and 22119 transitions. [2021-11-03 05:27:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:27:40,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-03 05:27:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:41,005 INFO L225 Difference]: With dead ends: 12076 [2021-11-03 05:27:41,005 INFO L226 Difference]: Without dead ends: 8809 [2021-11-03 05:27:41,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:27:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8809 states. [2021-11-03 05:27:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8809 to 8617. [2021-11-03 05:27:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8617 states, 8612 states have (on average 1.841848583372039) internal successors, (15862), 8616 states have internal predecessors, (15862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8617 states to 8617 states and 15862 transitions. [2021-11-03 05:27:41,515 INFO L78 Accepts]: Start accepts. Automaton has 8617 states and 15862 transitions. Word has length 92 [2021-11-03 05:27:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:41,515 INFO L470 AbstractCegarLoop]: Abstraction has 8617 states and 15862 transitions. [2021-11-03 05:27:41,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 8617 states and 15862 transitions. [2021-11-03 05:27:41,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 05:27:41,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:41,520 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:41,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:41,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:41,734 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:41,735 INFO L85 PathProgramCache]: Analyzing trace with hash -14421524, now seen corresponding path program 1 times [2021-11-03 05:27:41,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:41,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475519996] [2021-11-03 05:27:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:41,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:41,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:41,736 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:41,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:27:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:27:42,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:42,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:43,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:43,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475519996] [2021-11-03 05:27:43,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475519996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:43,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:43,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:27:43,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530461761] [2021-11-03 05:27:43,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:27:43,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:27:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:27:43,036 INFO L87 Difference]: Start difference. First operand 8617 states and 15862 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:45,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:45,530 INFO L93 Difference]: Finished difference Result 16275 states and 29867 transitions. [2021-11-03 05:27:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:27:45,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-03 05:27:45,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:45,539 INFO L225 Difference]: With dead ends: 16275 [2021-11-03 05:27:45,539 INFO L226 Difference]: Without dead ends: 9007 [2021-11-03 05:27:45,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:27:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9007 states. [2021-11-03 05:27:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9007 to 8552. [2021-11-03 05:27:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8552 states, 8547 states have (on average 1.83011583011583) internal successors, (15642), 8551 states have internal predecessors, (15642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8552 states to 8552 states and 15642 transitions. [2021-11-03 05:27:45,986 INFO L78 Accepts]: Start accepts. Automaton has 8552 states and 15642 transitions. Word has length 92 [2021-11-03 05:27:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:45,986 INFO L470 AbstractCegarLoop]: Abstraction has 8552 states and 15642 transitions. [2021-11-03 05:27:45,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 8552 states and 15642 transitions. [2021-11-03 05:27:45,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-03 05:27:45,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:45,989 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:46,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:46,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:46,202 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:46,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1401275252, now seen corresponding path program 1 times [2021-11-03 05:27:46,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:46,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576339429] [2021-11-03 05:27:46,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:46,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:46,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:46,204 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:46,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:27:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:27:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:47,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:47,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:47,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576339429] [2021-11-03 05:27:47,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576339429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:47,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:47,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:27:47,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017783229] [2021-11-03 05:27:47,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:27:47,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:47,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:27:47,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:27:47,580 INFO L87 Difference]: Start difference. First operand 8552 states and 15642 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:49,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:49,096 INFO L93 Difference]: Finished difference Result 17622 states and 32223 transitions. [2021-11-03 05:27:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:27:49,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-03 05:27:49,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:49,112 INFO L225 Difference]: With dead ends: 17622 [2021-11-03 05:27:49,113 INFO L226 Difference]: Without dead ends: 11656 [2021-11-03 05:27:49,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:27:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11656 states. [2021-11-03 05:27:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11656 to 8539. [2021-11-03 05:27:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8539 states, 8534 states have (on average 1.829857042418561) internal successors, (15616), 8538 states have internal predecessors, (15616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8539 states to 8539 states and 15616 transitions. [2021-11-03 05:27:49,706 INFO L78 Accepts]: Start accepts. Automaton has 8539 states and 15616 transitions. Word has length 94 [2021-11-03 05:27:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:49,707 INFO L470 AbstractCegarLoop]: Abstraction has 8539 states and 15616 transitions. [2021-11-03 05:27:49,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 8539 states and 15616 transitions. [2021-11-03 05:27:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-03 05:27:49,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:49,710 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:49,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:49,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:49,912 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash 919631418, now seen corresponding path program 1 times [2021-11-03 05:27:49,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:49,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770052225] [2021-11-03 05:27:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:49,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:49,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:49,915 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:49,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:27:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:27:50,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:51,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:51,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:51,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770052225] [2021-11-03 05:27:51,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770052225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:51,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:51,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:27:51,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233259432] [2021-11-03 05:27:51,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:27:51,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:27:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:27:51,354 INFO L87 Difference]: Start difference. First operand 8539 states and 15616 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:53,459 INFO L93 Difference]: Finished difference Result 39877 states and 73630 transitions. [2021-11-03 05:27:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:27:53,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-03 05:27:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:53,495 INFO L225 Difference]: With dead ends: 39877 [2021-11-03 05:27:53,495 INFO L226 Difference]: Without dead ends: 33921 [2021-11-03 05:27:53,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:27:53,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33921 states. [2021-11-03 05:27:54,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33921 to 14151. [2021-11-03 05:27:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14146 states have (on average 1.833027004100099) internal successors, (25930), 14150 states have internal predecessors, (25930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:54,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 25930 transitions. [2021-11-03 05:27:54,358 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 25930 transitions. Word has length 96 [2021-11-03 05:27:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:54,359 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 25930 transitions. [2021-11-03 05:27:54,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 25930 transitions. [2021-11-03 05:27:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 05:27:54,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:54,362 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:54,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:54,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:54,579 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:27:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash 300609294, now seen corresponding path program 1 times [2021-11-03 05:27:54,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:54,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667802744] [2021-11-03 05:27:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:54,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:54,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:54,580 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:54,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:27:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:55,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:27:55,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:55,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:27:56,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:56,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667802744] [2021-11-03 05:27:56,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667802744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:56,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:56,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:27:56,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720487619] [2021-11-03 05:27:56,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:27:56,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:56,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:27:56,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:27:56,080 INFO L87 Difference]: Start difference. First operand 14151 states and 25930 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:02,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:28:02,030 INFO L93 Difference]: Finished difference Result 87055 states and 160856 transitions. [2021-11-03 05:28:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:28:02,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-03 05:28:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:28:02,128 INFO L225 Difference]: With dead ends: 87055 [2021-11-03 05:28:02,128 INFO L226 Difference]: Without dead ends: 75487 [2021-11-03 05:28:02,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:28:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75487 states. [2021-11-03 05:28:03,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75487 to 24236. [2021-11-03 05:28:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24236 states, 24231 states have (on average 1.8419792827369899) internal successors, (44633), 24235 states have internal predecessors, (44633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24236 states to 24236 states and 44633 transitions. [2021-11-03 05:28:03,962 INFO L78 Accepts]: Start accepts. Automaton has 24236 states and 44633 transitions. Word has length 98 [2021-11-03 05:28:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:28:03,962 INFO L470 AbstractCegarLoop]: Abstraction has 24236 states and 44633 transitions. [2021-11-03 05:28:03,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 24236 states and 44633 transitions. [2021-11-03 05:28:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-03 05:28:03,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:28:03,965 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:28:03,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:28:04,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:28:04,178 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:28:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:28:04,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1186938113, now seen corresponding path program 1 times [2021-11-03 05:28:04,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:28:04,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133773092] [2021-11-03 05:28:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:28:04,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:28:04,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:28:04,182 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:28:04,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:28:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:28:05,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:28:05,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:28:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:28:05,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:28:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:28:05,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:28:05,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133773092] [2021-11-03 05:28:05,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133773092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:28:05,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:28:05,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:28:05,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226060240] [2021-11-03 05:28:05,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:28:05,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:28:05,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:28:05,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:28:05,530 INFO L87 Difference]: Start difference. First operand 24236 states and 44633 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:28:07,089 INFO L93 Difference]: Finished difference Result 45982 states and 84658 transitions. [2021-11-03 05:28:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:28:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-03 05:28:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:28:07,126 INFO L225 Difference]: With dead ends: 45982 [2021-11-03 05:28:07,126 INFO L226 Difference]: Without dead ends: 24251 [2021-11-03 05:28:07,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:28:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24251 states. [2021-11-03 05:28:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24251 to 24236. [2021-11-03 05:28:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24236 states, 24231 states have (on average 1.836449176674508) internal successors, (44499), 24235 states have internal predecessors, (44499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24236 states to 24236 states and 44499 transitions. [2021-11-03 05:28:08,719 INFO L78 Accepts]: Start accepts. Automaton has 24236 states and 44499 transitions. Word has length 105 [2021-11-03 05:28:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:28:08,719 INFO L470 AbstractCegarLoop]: Abstraction has 24236 states and 44499 transitions. [2021-11-03 05:28:08,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 24236 states and 44499 transitions. [2021-11-03 05:28:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-03 05:28:08,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:28:08,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:28:08,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:28:08,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:28:08,923 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:28:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:28:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1660188947, now seen corresponding path program 1 times [2021-11-03 05:28:08,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:28:08,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186471856] [2021-11-03 05:28:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:28:08,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:28:08,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:28:08,925 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:28:08,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:28:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:28:09,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:28:09,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:28:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:28:10,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:28:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:28:10,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:28:10,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186471856] [2021-11-03 05:28:10,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186471856] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:28:10,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:28:10,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:28:10,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793312910] [2021-11-03 05:28:10,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:28:10,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:28:10,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:28:10,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:28:10,632 INFO L87 Difference]: Start difference. First operand 24236 states and 44499 transitions. Second operand has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:28:15,889 INFO L93 Difference]: Finished difference Result 73446 states and 134850 transitions. [2021-11-03 05:28:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:28:15,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-03 05:28:15,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:28:15,963 INFO L225 Difference]: With dead ends: 73446 [2021-11-03 05:28:15,963 INFO L226 Difference]: Without dead ends: 51946 [2021-11-03 05:28:15,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:28:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51946 states. [2021-11-03 05:28:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51946 to 19595. [2021-11-03 05:28:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19595 states, 19590 states have (on average 1.8272588055130168) internal successors, (35796), 19594 states have internal predecessors, (35796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19595 states to 19595 states and 35796 transitions. [2021-11-03 05:28:17,558 INFO L78 Accepts]: Start accepts. Automaton has 19595 states and 35796 transitions. Word has length 106 [2021-11-03 05:28:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:28:17,558 INFO L470 AbstractCegarLoop]: Abstraction has 19595 states and 35796 transitions. [2021-11-03 05:28:17,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 19595 states and 35796 transitions. [2021-11-03 05:28:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-03 05:28:17,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:28:17,561 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:28:17,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:28:17,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:28:17,779 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:28:17,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:28:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1235877711, now seen corresponding path program 1 times [2021-11-03 05:28:17,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:28:17,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793260273] [2021-11-03 05:28:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:28:17,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:28:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:28:17,781 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:28:17,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 05:28:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:28:18,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:28:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:28:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:28:19,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:28:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:28:19,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:28:19,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793260273] [2021-11-03 05:28:19,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793260273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:28:19,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:28:19,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:28:19,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567563944] [2021-11-03 05:28:19,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:28:19,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:28:19,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:28:19,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:28:19,475 INFO L87 Difference]: Start difference. First operand 19595 states and 35796 transitions. Second operand has 10 states, 10 states have (on average 20.3) internal successors, (203), 9 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:28:36,031 INFO L93 Difference]: Finished difference Result 139162 states and 253492 transitions. [2021-11-03 05:28:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 05:28:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 9 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-03 05:28:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:28:36,239 INFO L225 Difference]: With dead ends: 139162 [2021-11-03 05:28:36,239 INFO L226 Difference]: Without dead ends: 120863 [2021-11-03 05:28:36,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:28:36,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120863 states. [2021-11-03 05:28:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120863 to 50698. [2021-11-03 05:28:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50698 states, 50693 states have (on average 1.8342374686840393) internal successors, (92983), 50697 states have internal predecessors, (92983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50698 states to 50698 states and 92983 transitions. [2021-11-03 05:28:40,938 INFO L78 Accepts]: Start accepts. Automaton has 50698 states and 92983 transitions. Word has length 106 [2021-11-03 05:28:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:28:40,938 INFO L470 AbstractCegarLoop]: Abstraction has 50698 states and 92983 transitions. [2021-11-03 05:28:40,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 9 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 50698 states and 92983 transitions. [2021-11-03 05:28:40,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-03 05:28:40,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:28:40,941 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:28:40,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:28:41,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:28:41,142 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:28:41,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:28:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash -727503147, now seen corresponding path program 1 times [2021-11-03 05:28:41,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:28:41,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814007320] [2021-11-03 05:28:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:28:41,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:28:41,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:28:41,144 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:28:41,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b9c9a8-b94b-4e76-835e-e2c4bb3ac73a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:28:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:28:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:28:42,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:28:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:28:42,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:28:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:28:42,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:28:42,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814007320] [2021-11-03 05:28:42,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814007320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:28:42,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:28:42,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:28:42,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785033734] [2021-11-03 05:28:42,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:28:42,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:28:42,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:28:42,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:28:42,808 INFO L87 Difference]: Start difference. First operand 50698 states and 92983 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:28:55,688 INFO L93 Difference]: Finished difference Result 193567 states and 355904 transitions. [2021-11-03 05:28:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:28:55,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-03 05:28:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:28:56,098 INFO L225 Difference]: With dead ends: 193567 [2021-11-03 05:28:56,098 INFO L226 Difference]: Without dead ends: 145627 [2021-11-03 05:28:56,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:28:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145627 states.