./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/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 d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:40:53,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:40:53,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:40:53,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:40:53,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:40:53,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:40:53,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:40:53,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:40:53,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:40:53,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:40:53,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:40:53,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:40:53,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:40:53,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:40:53,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:40:53,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:40:53,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:40:53,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:40:53,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:40:53,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:40:53,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:40:53,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:40:53,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:40:53,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:40:53,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:40:53,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:40:53,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:40:53,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:40:53,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:40:53,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:40:53,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:40:53,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:40:53,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:40:53,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:40:53,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:40:53,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:40:53,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:40:53,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:40:53,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:40:53,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:40:53,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:40:53,162 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:40:53,188 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:40:53,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:40:53,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:40:53,190 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:40:53,190 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:40:53,190 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:40:53,190 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:40:53,191 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:40:53,191 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:40:53,191 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:40:53,191 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:40:53,192 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:40:53,192 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:40:53,192 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:40:53,192 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:40:53,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:40:53,193 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:40:53,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:40:53,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:40:53,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:40:53,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:40:53,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:40:53,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:40:53,195 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:40:53,195 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:40:53,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:40:53,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:40:53,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:40:53,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:40:53,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:40:53,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:40:53,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:40:53,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:40:53,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:40:53,202 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:40:53,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:40:53,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:40:53,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:40:53,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:40:53,203 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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 [2021-11-03 03:40:53,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:40:53,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:40:53,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:40:53,567 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:40:53,568 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:40:53,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-03 03:40:53,668 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/data/de6ccd8d3/f7cab4bece0c4e1d8a3bed3c6df777be/FLAG5c8dc1124 [2021-11-03 03:40:54,386 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:40:54,387 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-03 03:40:54,410 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/data/de6ccd8d3/f7cab4bece0c4e1d8a3bed3c6df777be/FLAG5c8dc1124 [2021-11-03 03:40:54,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/data/de6ccd8d3/f7cab4bece0c4e1d8a3bed3c6df777be [2021-11-03 03:40:54,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:40:54,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:40:54,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:54,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:40:54,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:40:54,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:54" (1/1) ... [2021-11-03 03:40:54,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c55337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:54, skipping insertion in model container [2021-11-03 03:40:54,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:54" (1/1) ... [2021-11-03 03:40:54,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:40:54,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:40:55,029 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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-03 03:40:55,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:55,122 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 03:40:55,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16d65877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:55, skipping insertion in model container [2021-11-03 03:40:55,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:55,124 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:40:55,126 INFO L168 Benchmark]: Toolchain (without parser) took 619.09 ms. Allocated memory is still 136.3 MB. Free memory was 95.5 MB in the beginning and 94.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 03:40:55,127 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 136.3 MB. Free memory was 109.9 MB in the beginning and 109.8 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:40:55,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.09 ms. Allocated memory is still 136.3 MB. Free memory was 95.5 MB in the beginning and 94.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 03:40:55,130 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 136.3 MB. Free memory was 109.9 MB in the beginning and 109.8 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 616.09 ms. Allocated memory is still 136.3 MB. Free memory was 95.5 MB in the beginning and 94.2 MB in the end (delta: 1.3 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: 77]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/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 d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:40:57,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:40:57,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:40:57,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:40:57,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:40:57,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:40:57,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:40:57,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:40:57,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:40:57,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:40:57,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:40:57,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:40:57,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:40:57,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:40:57,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:40:57,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:40:57,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:40:57,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:40:57,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:40:57,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:40:57,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:40:57,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:40:57,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:40:57,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:40:57,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:40:57,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:40:57,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:40:57,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:40:57,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:40:57,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:40:57,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:40:57,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:40:57,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:40:57,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:40:57,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:40:57,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:40:57,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:40:57,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:40:57,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:40:57,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:40:57,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:40:57,571 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 03:40:57,604 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:40:57,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:40:57,606 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:40:57,606 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:40:57,606 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:40:57,607 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:40:57,607 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:40:57,607 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:40:57,608 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:40:57,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:40:57,609 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:40:57,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:40:57,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:40:57,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:40:57,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:40:57,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:40:57,611 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:40:57,611 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:40:57,611 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:40:57,612 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:40:57,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:40:57,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:40:57,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:40:57,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:40:57,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:40:57,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:40:57,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:40:57,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:40:57,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:40:57,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:40:57,615 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:40:57,615 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:40:57,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:40:57,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:40:57,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:40:57,616 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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 [2021-11-03 03:40:58,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:40:58,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:40:58,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:40:58,112 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:40:58,113 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:40:58,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-03 03:40:58,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/data/411f10259/1906e747134446ceb5a43bae2521cced/FLAG518f6254d [2021-11-03 03:40:59,151 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:40:59,152 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2021-11-03 03:40:59,193 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/data/411f10259/1906e747134446ceb5a43bae2521cced/FLAG518f6254d [2021-11-03 03:40:59,269 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/data/411f10259/1906e747134446ceb5a43bae2521cced [2021-11-03 03:40:59,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:40:59,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:40:59,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:59,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:40:59,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:40:59,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:59" (1/1) ... [2021-11-03 03:40:59,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67cc04bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:59, skipping insertion in model container [2021-11-03 03:40:59,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:59" (1/1) ... [2021-11-03 03:40:59,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:40:59,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:40:59,809 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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-03 03:40:59,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:59,982 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:41:00,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:41:00,173 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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-03 03:41:00,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:41:00,214 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:41:00,366 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_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2021-11-03 03:41:00,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:41:00,432 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:41:00,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00 WrapperNode [2021-11-03 03:41:00,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:41:00,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:41:00,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:41:00,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:41:00,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2021-11-03 03:41:00,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2021-11-03 03:41:00,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:41:00,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:41:00,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:41:00,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:41:00,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2021-11-03 03:41:00,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2021-11-03 03:41:00,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2021-11-03 03:41:00,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2021-11-03 03:41:01,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2021-11-03 03:41:01,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2021-11-03 03:41:01,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2021-11-03 03:41:01,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:41:01,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:41:01,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:41:01,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:41:01,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2021-11-03 03:41:01,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:41:01,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:41:01,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:41:01,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:41:01,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:41:01,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:41:01,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:41:01,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:41:16,565 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:41:16,567 INFO L299 CfgBuilder]: Removed 1113 assume(true) statements. [2021-11-03 03:41:16,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:41:16 BoogieIcfgContainer [2021-11-03 03:41:16,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:41:16,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:41:16,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:41:16,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:41:16,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:40:59" (1/3) ... [2021-11-03 03:41:16,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ec975f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:41:16, skipping insertion in model container [2021-11-03 03:41:16,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (2/3) ... [2021-11-03 03:41:16,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ec975f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:41:16, skipping insertion in model container [2021-11-03 03:41:16,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:41:16" (3/3) ... [2021-11-03 03:41:16,586 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product26.cil.c [2021-11-03 03:41:16,592 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:41:16,592 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 03:41:16,673 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:41:16,680 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 03:41:16,680 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 03:41:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 4860 states, 4854 states have (on average 1.8951380304903174) internal successors, (9199), 4859 states have internal predecessors, (9199), 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 03:41:16,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-03 03:41:16,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:16,815 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] [2021-11-03 03:41:16,816 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 03:41:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash -4419781, now seen corresponding path program 1 times [2021-11-03 03:41:16,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:16,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005020332] [2021-11-03 03:41:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:16,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:16,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:16,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:16,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:41:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 03:41:17,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:17,359 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 03:41:17,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:17,414 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 03:41:17,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:17,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005020332] [2021-11-03 03:41:17,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005020332] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:17,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:17,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:41:17,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286396507] [2021-11-03 03:41:17,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 03:41:17,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:17,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 03:41:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:41:17,462 INFO L87 Difference]: Start difference. First operand has 4860 states, 4854 states have (on average 1.8951380304903174) internal successors, (9199), 4859 states have internal predecessors, (9199), 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 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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 03:41:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:17,652 INFO L93 Difference]: Finished difference Result 4879 states and 9222 transitions. [2021-11-03 03:41:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:41:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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 26 [2021-11-03 03:41:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:17,714 INFO L225 Difference]: With dead ends: 4879 [2021-11-03 03:41:17,714 INFO L226 Difference]: Without dead ends: 4856 [2021-11-03 03:41:17,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 50 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 03:41:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-03 03:41:18,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2021-11-03 03:41:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4851 states have (on average 1.893836322407751) internal successors, (9187), 4855 states have internal predecessors, (9187), 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 03:41:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 9187 transitions. [2021-11-03 03:41:18,059 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 9187 transitions. Word has length 26 [2021-11-03 03:41:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:18,060 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 9187 transitions. [2021-11-03 03:41:18,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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 03:41:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 9187 transitions. [2021-11-03 03:41:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-03 03:41:18,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:18,064 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] [2021-11-03 03:41:18,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:18,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:18,278 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 03:41:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:18,279 INFO L85 PathProgramCache]: Analyzing trace with hash -308036790, now seen corresponding path program 1 times [2021-11-03 03:41:18,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:18,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120761549] [2021-11-03 03:41:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:18,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:18,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:18,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:18,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:41:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:41:18,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:18,777 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 03:41:18,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:18,888 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 03:41:18,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:18,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120761549] [2021-11-03 03:41:18,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120761549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:18,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:18,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:41:18,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551363078] [2021-11-03 03:41:18,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:41:18,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:41:18,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:41:18,894 INFO L87 Difference]: Start difference. First operand 4856 states and 9187 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 03:41:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:19,219 INFO L93 Difference]: Finished difference Result 9699 states and 18355 transitions. [2021-11-03 03:41:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:41:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 28 [2021-11-03 03:41:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:19,258 INFO L225 Difference]: With dead ends: 9699 [2021-11-03 03:41:19,258 INFO L226 Difference]: Without dead ends: 4856 [2021-11-03 03:41:19,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 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 03:41:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-03 03:41:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2021-11-03 03:41:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4851 states have (on average 1.8925994640280355) internal successors, (9181), 4855 states have internal predecessors, (9181), 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 03:41:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 9181 transitions. [2021-11-03 03:41:19,472 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 9181 transitions. Word has length 28 [2021-11-03 03:41:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:19,472 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 9181 transitions. [2021-11-03 03:41:19,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 03:41:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 9181 transitions. [2021-11-03 03:41:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-03 03:41:19,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:19,476 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] [2021-11-03 03:41:19,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 03:41:19,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:19,693 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 03:41:19,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:19,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1766352340, now seen corresponding path program 1 times [2021-11-03 03:41:19,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:19,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346882137] [2021-11-03 03:41:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:19,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:19,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:19,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:19,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:41:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:41:20,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:20,247 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 03:41:20,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:20,367 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 03:41:20,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:20,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346882137] [2021-11-03 03:41:20,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346882137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:20,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:20,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:41:20,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709541579] [2021-11-03 03:41:20,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:41:20,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:20,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:41:20,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:41:20,371 INFO L87 Difference]: Start difference. First operand 4856 states and 9181 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 03:41:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:20,921 INFO L93 Difference]: Finished difference Result 9663 states and 18278 transitions. [2021-11-03 03:41:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:41:20,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 33 [2021-11-03 03:41:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:20,959 INFO L225 Difference]: With dead ends: 9663 [2021-11-03 03:41:20,959 INFO L226 Difference]: Without dead ends: 4829 [2021-11-03 03:41:20,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 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 03:41:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2021-11-03 03:41:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2021-11-03 03:41:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4824 states have (on average 1.8915837479270314) internal successors, (9125), 4828 states have internal predecessors, (9125), 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 03:41:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9125 transitions. [2021-11-03 03:41:21,204 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9125 transitions. Word has length 33 [2021-11-03 03:41:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:21,205 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 9125 transitions. [2021-11-03 03:41:21,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 03:41:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9125 transitions. [2021-11-03 03:41:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 03:41:21,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:21,210 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] [2021-11-03 03:41:21,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:21,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:21,428 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 03:41:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:21,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1940850698, now seen corresponding path program 1 times [2021-11-03 03:41:21,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:21,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148989106] [2021-11-03 03:41:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:21,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:21,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:21,435 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:21,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:41:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:21,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:41:21,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:21,984 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 03:41:21,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:22,088 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 03:41:22,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:22,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148989106] [2021-11-03 03:41:22,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148989106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:22,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:22,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:41:22,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224905864] [2021-11-03 03:41:22,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:41:22,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:22,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:41:22,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:41:22,092 INFO L87 Difference]: Start difference. First operand 4829 states and 9125 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 03:41:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:22,413 INFO L93 Difference]: Finished difference Result 9636 states and 18222 transitions. [2021-11-03 03:41:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:41:22,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 34 [2021-11-03 03:41:22,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:22,450 INFO L225 Difference]: With dead ends: 9636 [2021-11-03 03:41:22,451 INFO L226 Difference]: Without dead ends: 4829 [2021-11-03 03:41:22,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 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 03:41:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2021-11-03 03:41:22,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2021-11-03 03:41:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4824 states have (on average 1.890339966832504) internal successors, (9119), 4828 states have internal predecessors, (9119), 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 03:41:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 9119 transitions. [2021-11-03 03:41:22,692 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 9119 transitions. Word has length 34 [2021-11-03 03:41:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:22,693 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 9119 transitions. [2021-11-03 03:41:22,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 03:41:22,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 9119 transitions. [2021-11-03 03:41:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 03:41:22,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:22,698 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] [2021-11-03 03:41:22,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-03 03:41:22,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:22,915 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 03:41:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash -838445753, now seen corresponding path program 1 times [2021-11-03 03:41:22,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:22,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511099085] [2021-11-03 03:41:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:22,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:22,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:22,919 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:22,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:41:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:23,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 03:41:23,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:23,559 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 03:41:23,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:23,720 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 03:41:23,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:23,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511099085] [2021-11-03 03:41:23,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511099085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:23,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:23,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 03:41:23,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469556158] [2021-11-03 03:41:23,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:41:23,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:41:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:41:23,723 INFO L87 Difference]: Start difference. First operand 4829 states and 9119 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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 03:41:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:24,109 INFO L93 Difference]: Finished difference Result 9630 states and 18205 transitions. [2021-11-03 03:41:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:41:24,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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 39 [2021-11-03 03:41:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:24,205 INFO L225 Difference]: With dead ends: 9630 [2021-11-03 03:41:24,205 INFO L226 Difference]: Without dead ends: 4826 [2021-11-03 03:41:24,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 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 03:41:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-03 03:41:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-11-03 03:41:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4821 states have (on average 1.8898568761667704) internal successors, (9111), 4825 states have internal predecessors, (9111), 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 03:41:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 9111 transitions. [2021-11-03 03:41:24,487 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 9111 transitions. Word has length 39 [2021-11-03 03:41:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:24,488 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 9111 transitions. [2021-11-03 03:41:24,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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 03:41:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 9111 transitions. [2021-11-03 03:41:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 03:41:24,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:24,490 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] [2021-11-03 03:41:24,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:24,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:24,707 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 03:41:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash -613413097, now seen corresponding path program 1 times [2021-11-03 03:41:24,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:24,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705803473] [2021-11-03 03:41:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:24,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:24,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:24,712 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:24,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:41:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:41:25,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:25,531 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 03:41:25,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:25,743 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 03:41:25,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:25,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705803473] [2021-11-03 03:41:25,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705803473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:25,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:25,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:41:25,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869832806] [2021-11-03 03:41:25,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:41:25,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:25,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:41:25,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:41:25,747 INFO L87 Difference]: Start difference. First operand 4826 states and 9111 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 03:41:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:26,624 INFO L93 Difference]: Finished difference Result 13250 states and 25078 transitions. [2021-11-03 03:41:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:41:26,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 40 [2021-11-03 03:41:26,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:26,664 INFO L225 Difference]: With dead ends: 13250 [2021-11-03 03:41:26,665 INFO L226 Difference]: Without dead ends: 10795 [2021-11-03 03:41:26,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 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 03:41:26,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2021-11-03 03:41:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 6386. [2021-11-03 03:41:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6381 states have (on average 1.8920231938567622) internal successors, (12073), 6385 states have internal predecessors, (12073), 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 03:41:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 12073 transitions. [2021-11-03 03:41:27,066 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 12073 transitions. Word has length 40 [2021-11-03 03:41:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:27,067 INFO L470 AbstractCegarLoop]: Abstraction has 6386 states and 12073 transitions. [2021-11-03 03:41:27,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 03:41:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 12073 transitions. [2021-11-03 03:41:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 03:41:27,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:27,072 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] [2021-11-03 03:41:27,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:27,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:27,289 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 03:41:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:27,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1747046172, now seen corresponding path program 1 times [2021-11-03 03:41:27,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:27,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397653716] [2021-11-03 03:41:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:27,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:27,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:27,293 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:27,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:41:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:27,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:41:27,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:28,063 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 03:41:28,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:28,302 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 03:41:28,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:28,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397653716] [2021-11-03 03:41:28,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397653716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:28,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:28,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 03:41:28,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934466578] [2021-11-03 03:41:28,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:41:28,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:41:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:41:28,305 INFO L87 Difference]: Start difference. First operand 6386 states and 12073 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 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 03:41:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:29,085 INFO L93 Difference]: Finished difference Result 12156 states and 22782 transitions. [2021-11-03 03:41:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 03:41:29,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 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 53 [2021-11-03 03:41:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:29,119 INFO L225 Difference]: With dead ends: 12156 [2021-11-03 03:41:29,120 INFO L226 Difference]: Without dead ends: 6989 [2021-11-03 03:41:29,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:41:29,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6989 states. [2021-11-03 03:41:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6989 to 4741. [2021-11-03 03:41:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4736 states have (on average 1.8855574324324325) internal successors, (8930), 4740 states have internal predecessors, (8930), 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 03:41:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 8930 transitions. [2021-11-03 03:41:29,409 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 8930 transitions. Word has length 53 [2021-11-03 03:41:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:29,411 INFO L470 AbstractCegarLoop]: Abstraction has 4741 states and 8930 transitions. [2021-11-03 03:41:29,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 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 03:41:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 8930 transitions. [2021-11-03 03:41:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 03:41:29,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:29,416 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 03:41:29,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:29,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:29,641 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 03:41:29,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:29,642 INFO L85 PathProgramCache]: Analyzing trace with hash 237412071, now seen corresponding path program 1 times [2021-11-03 03:41:29,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:29,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318874965] [2021-11-03 03:41:29,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:29,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:29,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:29,650 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:29,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:41:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:30,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:41:30,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:30,497 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 03:41:30,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:30,718 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 03:41:30,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:30,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318874965] [2021-11-03 03:41:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318874965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:30,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:30,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:41:30,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619011241] [2021-11-03 03:41:30,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:41:30,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:41:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:41:30,721 INFO L87 Difference]: Start difference. First operand 4741 states and 8930 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 03:41:34,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:34,107 INFO L93 Difference]: Finished difference Result 19060 states and 35858 transitions. [2021-11-03 03:41:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:41:34,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 03:41:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:34,162 INFO L225 Difference]: With dead ends: 19060 [2021-11-03 03:41:34,162 INFO L226 Difference]: Without dead ends: 14362 [2021-11-03 03:41:34,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 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 03:41:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14362 states. [2021-11-03 03:41:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14362 to 4749. [2021-11-03 03:41:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4749 states, 4744 states have (on average 1.8840640809443507) internal successors, (8938), 4748 states have internal predecessors, (8938), 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 03:41:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 8938 transitions. [2021-11-03 03:41:34,645 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 8938 transitions. Word has length 54 [2021-11-03 03:41:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:34,648 INFO L470 AbstractCegarLoop]: Abstraction has 4749 states and 8938 transitions. [2021-11-03 03:41:34,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 03:41:34,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 8938 transitions. [2021-11-03 03:41:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 03:41:34,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:34,652 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] [2021-11-03 03:41:34,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:34,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:34,880 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 03:41:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash -665481789, now seen corresponding path program 1 times [2021-11-03 03:41:34,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:34,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030022519] [2021-11-03 03:41:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:34,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:34,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:34,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:34,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:41:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:41:35,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:35,626 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 03:41:35,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:35,823 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 03:41:35,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:35,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030022519] [2021-11-03 03:41:35,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030022519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:35,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:35,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:41:35,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427428245] [2021-11-03 03:41:35,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:41:35,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:41:35,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:41:35,826 INFO L87 Difference]: Start difference. First operand 4749 states and 8938 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 03:41:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:43,952 INFO L93 Difference]: Finished difference Result 13321 states and 25017 transitions. [2021-11-03 03:41:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:41:43,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 55 [2021-11-03 03:41:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:43,987 INFO L225 Difference]: With dead ends: 13321 [2021-11-03 03:41:43,987 INFO L226 Difference]: Without dead ends: 9964 [2021-11-03 03:41:43,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 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 03:41:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9964 states. [2021-11-03 03:41:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9964 to 8917. [2021-11-03 03:41:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8912 states have (on average 1.8855475763016158) internal successors, (16804), 8916 states have internal predecessors, (16804), 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 03:41:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 16804 transitions. [2021-11-03 03:41:44,578 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 16804 transitions. Word has length 55 [2021-11-03 03:41:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:44,578 INFO L470 AbstractCegarLoop]: Abstraction has 8917 states and 16804 transitions. [2021-11-03 03:41:44,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 03:41:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 16804 transitions. [2021-11-03 03:41:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 03:41:44,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:44,582 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 03:41:44,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:44,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:44,805 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 03:41:44,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:44,805 INFO L85 PathProgramCache]: Analyzing trace with hash 744308411, now seen corresponding path program 1 times [2021-11-03 03:41:44,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:44,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68471110] [2021-11-03 03:41:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:44,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:44,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:44,809 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:44,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 03:41:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:41:45,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:45,544 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 03:41:45,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:45,753 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 03:41:45,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:45,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68471110] [2021-11-03 03:41:45,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68471110] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:45,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:45,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:41:45,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249277063] [2021-11-03 03:41:45,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:41:45,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:41:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:41:45,756 INFO L87 Difference]: Start difference. First operand 8917 states and 16804 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:48,416 INFO L93 Difference]: Finished difference Result 17381 states and 32589 transitions. [2021-11-03 03:41:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:41:48,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:48,444 INFO L225 Difference]: With dead ends: 17381 [2021-11-03 03:41:48,445 INFO L226 Difference]: Without dead ends: 9848 [2021-11-03 03:41:48,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 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 03:41:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-03 03:41:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 8849. [2021-11-03 03:41:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8844 states have (on average 1.8747173224785165) internal successors, (16580), 8848 states have internal predecessors, (16580), 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 03:41:48,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 16580 transitions. [2021-11-03 03:41:48,974 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 16580 transitions. Word has length 56 [2021-11-03 03:41:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:48,975 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 16580 transitions. [2021-11-03 03:41:48,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 03:41:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 16580 transitions. [2021-11-03 03:41:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 03:41:48,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:48,978 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 03:41:48,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:49,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:49,196 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 03:41:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:49,197 INFO L85 PathProgramCache]: Analyzing trace with hash 454916123, now seen corresponding path program 1 times [2021-11-03 03:41:49,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:49,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729069870] [2021-11-03 03:41:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:49,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:49,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:49,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:49,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 03:41:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:49,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:41:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:50,073 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 03:41:50,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:50,288 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 03:41:50,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:50,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729069870] [2021-11-03 03:41:50,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729069870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:50,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:50,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:41:50,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712209425] [2021-11-03 03:41:50,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:41:50,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:41:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:41:50,291 INFO L87 Difference]: Start difference. First operand 8849 states and 16580 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 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 03:41:52,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:52,959 INFO L93 Difference]: Finished difference Result 64605 states and 121321 transitions. [2021-11-03 03:41:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:41:52,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 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 03:41:52,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:53,101 INFO L225 Difference]: With dead ends: 64605 [2021-11-03 03:41:53,101 INFO L226 Difference]: Without dead ends: 55795 [2021-11-03 03:41:53,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 109 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 03:41:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55795 states. [2021-11-03 03:41:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55795 to 16688. [2021-11-03 03:41:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16688 states, 16683 states have (on average 1.8754420667745608) internal successors, (31288), 16687 states have internal predecessors, (31288), 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 03:41:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16688 states to 16688 states and 31288 transitions. [2021-11-03 03:41:54,670 INFO L78 Accepts]: Start accepts. Automaton has 16688 states and 31288 transitions. Word has length 57 [2021-11-03 03:41:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:54,670 INFO L470 AbstractCegarLoop]: Abstraction has 16688 states and 31288 transitions. [2021-11-03 03:41:54,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 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 03:41:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 16688 states and 31288 transitions. [2021-11-03 03:41:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 03:41:54,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:54,673 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 03:41:54,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:54,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:54,888 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 03:41:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:54,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1350522211, now seen corresponding path program 1 times [2021-11-03 03:41:54,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:54,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671199665] [2021-11-03 03:41:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:54,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:54,890 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:54,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:41:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:55,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:41:55,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:55,716 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 03:41:55,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:55,941 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 03:41:55,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:55,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671199665] [2021-11-03 03:41:55,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671199665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:55,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:55,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:41:55,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368448468] [2021-11-03 03:41:55,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:41:55,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:41:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:41:55,944 INFO L87 Difference]: Start difference. First operand 16688 states and 31288 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 03:41:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:58,099 INFO L93 Difference]: Finished difference Result 60853 states and 114287 transitions. [2021-11-03 03:41:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:41:58,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 03:41:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:58,183 INFO L225 Difference]: With dead ends: 60853 [2021-11-03 03:41:58,183 INFO L226 Difference]: Without dead ends: 48801 [2021-11-03 03:41:58,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 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 03:41:58,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48801 states. [2021-11-03 03:41:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48801 to 28183. [2021-11-03 03:41:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28183 states, 28178 states have (on average 1.8769607495209029) internal successors, (52889), 28182 states have internal predecessors, (52889), 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 03:41:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28183 states to 28183 states and 52889 transitions. [2021-11-03 03:41:59,801 INFO L78 Accepts]: Start accepts. Automaton has 28183 states and 52889 transitions. Word has length 57 [2021-11-03 03:41:59,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:59,802 INFO L470 AbstractCegarLoop]: Abstraction has 28183 states and 52889 transitions. [2021-11-03 03:41:59,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 03:41:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 28183 states and 52889 transitions. [2021-11-03 03:41:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 03:41:59,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:59,805 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 03:41:59,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:00,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:00,020 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 03:42:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:00,021 INFO L85 PathProgramCache]: Analyzing trace with hash 939482835, now seen corresponding path program 1 times [2021-11-03 03:42:00,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:00,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549073109] [2021-11-03 03:42:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:00,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:00,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:00,023 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:00,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 03:42:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:00,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:42:00,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:00,890 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 03:42:00,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:01,124 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 03:42:01,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:01,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549073109] [2021-11-03 03:42:01,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549073109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:01,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:01,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:42:01,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135449393] [2021-11-03 03:42:01,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:42:01,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:01,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:42:01,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:42:01,127 INFO L87 Difference]: Start difference. First operand 28183 states and 52889 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 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 03:42:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:10,255 INFO L93 Difference]: Finished difference Result 178393 states and 335412 transitions. [2021-11-03 03:42:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:42:10,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 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 03:42:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:10,569 INFO L225 Difference]: With dead ends: 178393 [2021-11-03 03:42:10,570 INFO L226 Difference]: Without dead ends: 154846 [2021-11-03 03:42:10,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:42:11,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154846 states. [2021-11-03 03:42:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154846 to 49001. [2021-11-03 03:42:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49001 states, 48996 states have (on average 1.8784594660788636) internal successors, (92037), 49000 states have internal predecessors, (92037), 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 03:42:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49001 states to 49001 states and 92037 transitions. [2021-11-03 03:42:14,248 INFO L78 Accepts]: Start accepts. Automaton has 49001 states and 92037 transitions. Word has length 59 [2021-11-03 03:42:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:14,248 INFO L470 AbstractCegarLoop]: Abstraction has 49001 states and 92037 transitions. [2021-11-03 03:42:14,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 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 03:42:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 49001 states and 92037 transitions. [2021-11-03 03:42:14,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:42:14,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:14,251 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] [2021-11-03 03:42:14,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 03:42:14,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:14,456 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 03:42:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:14,456 INFO L85 PathProgramCache]: Analyzing trace with hash 282834690, now seen corresponding path program 1 times [2021-11-03 03:42:14,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:14,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505909361] [2021-11-03 03:42:14,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:14,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:14,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:14,458 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:14,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 03:42:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:15,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:15,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:15,283 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 03:42:15,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:15,441 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 03:42:15,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:15,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505909361] [2021-11-03 03:42:15,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505909361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:15,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:15,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:42:15,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517331006] [2021-11-03 03:42:15,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:15,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:15,444 INFO L87 Difference]: Start difference. First operand 49001 states and 92037 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 03:42:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:20,195 INFO L93 Difference]: Finished difference Result 121013 states and 226772 transitions. [2021-11-03 03:42:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:20,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 66 [2021-11-03 03:42:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:20,453 INFO L225 Difference]: With dead ends: 121013 [2021-11-03 03:42:20,453 INFO L226 Difference]: Without dead ends: 73900 [2021-11-03 03:42:20,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 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 03:42:20,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73900 states. [2021-11-03 03:42:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73900 to 48761. [2021-11-03 03:42:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48761 states, 48756 states have (on average 1.8697391090327344) internal successors, (91161), 48760 states have internal predecessors, (91161), 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 03:42:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48761 states to 48761 states and 91161 transitions. [2021-11-03 03:42:23,431 INFO L78 Accepts]: Start accepts. Automaton has 48761 states and 91161 transitions. Word has length 66 [2021-11-03 03:42:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:23,431 INFO L470 AbstractCegarLoop]: Abstraction has 48761 states and 91161 transitions. [2021-11-03 03:42:23,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 03:42:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 48761 states and 91161 transitions. [2021-11-03 03:42:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:42:23,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:23,435 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] [2021-11-03 03:42:23,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:23,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:23,643 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 03:42:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:23,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1532267487, now seen corresponding path program 1 times [2021-11-03 03:42:23,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:23,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629365255] [2021-11-03 03:42:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:23,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:23,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:23,648 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:23,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:42:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:24,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:24,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:24,597 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 03:42:24,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:24,757 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 03:42:24,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:24,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629365255] [2021-11-03 03:42:24,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629365255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:24,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:24,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:42:24,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18464366] [2021-11-03 03:42:24,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:24,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:24,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:24,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:24,760 INFO L87 Difference]: Start difference. First operand 48761 states and 91161 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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 03:42:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:27,509 INFO L93 Difference]: Finished difference Result 93033 states and 173891 transitions. [2021-11-03 03:42:27,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:27,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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 66 [2021-11-03 03:42:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:27,578 INFO L225 Difference]: With dead ends: 93033 [2021-11-03 03:42:27,578 INFO L226 Difference]: Without dead ends: 48776 [2021-11-03 03:42:27,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 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 03:42:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48776 states. [2021-11-03 03:42:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48776 to 48761. [2021-11-03 03:42:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48761 states, 48756 states have (on average 1.8644064320288785) internal successors, (90901), 48760 states have internal predecessors, (90901), 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 03:42:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48761 states to 48761 states and 90901 transitions. [2021-11-03 03:42:30,343 INFO L78 Accepts]: Start accepts. Automaton has 48761 states and 90901 transitions. Word has length 66 [2021-11-03 03:42:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:30,343 INFO L470 AbstractCegarLoop]: Abstraction has 48761 states and 90901 transitions. [2021-11-03 03:42:30,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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 03:42:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 48761 states and 90901 transitions. [2021-11-03 03:42:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 03:42:30,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:30,347 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] [2021-11-03 03:42:30,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:30,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:30,547 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 03:42:30,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1047073688, now seen corresponding path program 1 times [2021-11-03 03:42:30,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:30,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479665393] [2021-11-03 03:42:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:30,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:30,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:30,551 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:30,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c4fa8e-5f27-41e2-a92b-58c55dd6e4a7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 03:42:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:31,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:42:31,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:31,604 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 03:42:31,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:31,893 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 03:42:31,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:31,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479665393] [2021-11-03 03:42:31,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479665393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:31,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:31,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:42:31,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619025451] [2021-11-03 03:42:31,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:42:31,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:31,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:42:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:42:31,896 INFO L87 Difference]: Start difference. First operand 48761 states and 90901 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 5 states have internal predecessors, (120), 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)