./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/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 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:12:49,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:12:49,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:12:49,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:12:49,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:12:49,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:12:49,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:12:49,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:12:49,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:12:49,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:12:49,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:12:49,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:12:49,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:12:49,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:12:49,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:12:49,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:12:49,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:12:49,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:12:49,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:12:49,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:12:49,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:12:49,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:12:49,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:12:49,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:12:49,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:12:49,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:12:49,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:12:49,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:12:49,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:12:49,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:12:49,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:12:49,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:12:49,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:12:49,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:12:49,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:12:49,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:12:49,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:12:49,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:12:49,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:12:49,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:12:49,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:12:49,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:12:49,233 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:12:49,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:12:49,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:12:49,235 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:12:49,235 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:12:49,235 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:12:49,236 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:12:49,236 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:12:49,236 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:12:49,236 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:12:49,237 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:12:49,238 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:12:49,238 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:12:49,238 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:12:49,239 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:12:49,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:12:49,240 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:12:49,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:12:49,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:12:49,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:12:49,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:12:49,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:12:49,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:12:49,241 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:12:49,241 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:12:49,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:12:49,242 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:12:49,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:12:49,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:12:49,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:12:49,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:12:49,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:12:49,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:12:49,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:12:49,245 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:12:49,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:12:49,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:12:49,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:12:49,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:12:49,246 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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 [2021-11-03 04:12:49,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:12:49,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:12:49,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:12:49,619 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:12:49,620 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:12:49,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2021-11-03 04:12:49,731 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/data/3e672a2a5/474260540edf43fe831de1f5093c7298/FLAG583d44c43 [2021-11-03 04:12:50,645 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:12:50,652 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2021-11-03 04:12:50,697 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/data/3e672a2a5/474260540edf43fe831de1f5093c7298/FLAG583d44c43 [2021-11-03 04:12:50,778 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/data/3e672a2a5/474260540edf43fe831de1f5093c7298 [2021-11-03 04:12:50,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:12:50,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:12:50,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:12:50,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:12:50,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:12:50,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:12:50" (1/1) ... [2021-11-03 04:12:50,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3926c994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:50, skipping insertion in model container [2021-11-03 04:12:50,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:12:50" (1/1) ... [2021-11-03 04:12:50,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:12:50,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:12:51,500 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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2021-11-03 04:12:51,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:12:51,745 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 04:12:51,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38ad7fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:51, skipping insertion in model container [2021-11-03 04:12:51,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:12:51,746 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:12:51,749 INFO L168 Benchmark]: Toolchain (without parser) took 961.96 ms. Allocated memory is still 130.0 MB. Free memory was 94.2 MB in the beginning and 91.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:12:51,750 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 81.8 MB. Free memory is still 36.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:12:51,751 INFO L168 Benchmark]: CACSL2BoogieTranslator took 956.60 ms. Allocated memory is still 130.0 MB. Free memory was 93.9 MB in the beginning and 91.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:12:51,753 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 81.8 MB. Free memory is still 36.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 956.60 ms. Allocated memory is still 130.0 MB. Free memory was 93.9 MB in the beginning and 91.6 MB in the end (delta: 2.3 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: 1863]: 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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/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 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:12:54,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:12:54,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:12:54,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:12:54,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:12:54,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:12:54,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:12:54,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:12:54,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:12:54,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:12:54,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:12:54,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:12:54,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:12:54,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:12:54,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:12:54,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:12:54,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:12:54,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:12:54,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:12:54,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:12:54,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:12:54,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:12:54,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:12:54,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:12:54,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:12:54,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:12:54,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:12:54,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:12:54,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:12:54,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:12:54,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:12:54,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:12:54,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:12:54,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:12:54,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:12:54,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:12:54,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:12:54,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:12:54,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:12:54,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:12:54,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:12:54,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:12:54,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:12:54,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:12:54,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:12:54,817 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:12:54,818 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:12:54,818 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:12:54,818 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:12:54,818 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:12:54,819 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:12:54,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:12:54,821 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:12:54,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:12:54,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:12:54,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:12:54,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:12:54,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:12:54,823 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:12:54,823 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:12:54,823 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:12:54,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:12:54,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:12:54,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:12:54,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:12:54,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:12:54,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:12:54,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:12:54,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:12:54,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:12:54,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:12:54,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:12:54,826 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:12:54,826 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:12:54,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:12:54,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:12:54,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:12:54,828 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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 [2021-11-03 04:12:55,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:12:55,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:12:55,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:12:55,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:12:55,384 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:12:55,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2021-11-03 04:12:55,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/data/c67fc496f/884d4e8096284644825e1ef233a9bcf8/FLAGc82efbe63 [2021-11-03 04:12:56,273 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:12:56,274 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2021-11-03 04:12:56,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/data/c67fc496f/884d4e8096284644825e1ef233a9bcf8/FLAGc82efbe63 [2021-11-03 04:12:56,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/data/c67fc496f/884d4e8096284644825e1ef233a9bcf8 [2021-11-03 04:12:56,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:12:56,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:12:56,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:12:56,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:12:56,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:12:56,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:12:56" (1/1) ... [2021-11-03 04:12:56,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d63ba0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:56, skipping insertion in model container [2021-11-03 04:12:56,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:12:56" (1/1) ... [2021-11-03 04:12:56,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:12:56,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:12:57,190 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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2021-11-03 04:12:57,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:12:57,361 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:12:57,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:12:57,517 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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2021-11-03 04:12:57,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:12:57,628 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:12:57,740 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_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2021-11-03 04:12:57,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:12:57,846 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:12:57,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57 WrapperNode [2021-11-03 04:12:57,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:12:57,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:12:57,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:12:57,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:12:57,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (1/1) ... [2021-11-03 04:12:57,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (1/1) ... [2021-11-03 04:12:58,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:12:58,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:12:58,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:12:58,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:12:58,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (1/1) ... [2021-11-03 04:12:58,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (1/1) ... [2021-11-03 04:12:58,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (1/1) ... [2021-11-03 04:12:58,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (1/1) ... [2021-11-03 04:12:58,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (1/1) ... [2021-11-03 04:12:58,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (1/1) ... [2021-11-03 04:12:58,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (1/1) ... [2021-11-03 04:12:58,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:12:58,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:12:58,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:12:58,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:12:58,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (1/1) ... [2021-11-03 04:12:59,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:12:59,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:12:59,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:12:59,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:12:59,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:12:59,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:12:59,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:12:59,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:13:14,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:13:14,194 INFO L299 CfgBuilder]: Removed 1029 assume(true) statements. [2021-11-03 04:13:14,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:13:14 BoogieIcfgContainer [2021-11-03 04:13:14,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:13:14,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:13:14,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:13:14,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:13:14,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:12:56" (1/3) ... [2021-11-03 04:13:14,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@763f69be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:13:14, skipping insertion in model container [2021-11-03 04:13:14,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:12:57" (2/3) ... [2021-11-03 04:13:14,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@763f69be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:13:14, skipping insertion in model container [2021-11-03 04:13:14,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:13:14" (3/3) ... [2021-11-03 04:13:14,217 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product18.cil.c [2021-11-03 04:13:14,224 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:13:14,225 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:13:14,325 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:13:14,337 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 04:13:14,338 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:13:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 4644 states, 4638 states have (on average 1.8993100474342388) internal successors, (8809), 4643 states have internal predecessors, (8809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:14,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:13:14,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:14,493 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] [2021-11-03 04:13:14,494 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 04:13:14,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:14,499 INFO L85 PathProgramCache]: Analyzing trace with hash 380750393, now seen corresponding path program 1 times [2021-11-03 04:13:14,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:14,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997508018] [2021-11-03 04:13:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:14,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:14,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:14,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:13:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:15,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:13:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:15,158 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 04:13:15,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:15,231 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 04:13:15,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:15,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997508018] [2021-11-03 04:13:15,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997508018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:15,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:15,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:13:15,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313397905] [2021-11-03 04:13:15,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:13:15,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:13:15,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:13:15,282 INFO L87 Difference]: Start difference. First operand has 4644 states, 4638 states have (on average 1.8993100474342388) internal successors, (8809), 4643 states have internal predecessors, (8809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 04:13:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:15,498 INFO L93 Difference]: Finished difference Result 4663 states and 8832 transitions. [2021-11-03 04:13:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:13:15,500 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 27 [2021-11-03 04:13:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:15,576 INFO L225 Difference]: With dead ends: 4663 [2021-11-03 04:13:15,576 INFO L226 Difference]: Without dead ends: 4640 [2021-11-03 04:13:15,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 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 04:13:15,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4640 states. [2021-11-03 04:13:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4640 to 4640. [2021-11-03 04:13:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4635 states have (on average 1.8979503775620281) internal successors, (8797), 4639 states have internal predecessors, (8797), 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 04:13:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 8797 transitions. [2021-11-03 04:13:15,996 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 8797 transitions. Word has length 27 [2021-11-03 04:13:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:15,997 INFO L470 AbstractCegarLoop]: Abstraction has 4640 states and 8797 transitions. [2021-11-03 04:13:15,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 04:13:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 8797 transitions. [2021-11-03 04:13:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-03 04:13:16,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:16,009 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] [2021-11-03 04:13:16,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:16,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:16,228 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 04:13:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:16,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1229286641, now seen corresponding path program 1 times [2021-11-03 04:13:16,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:16,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514248312] [2021-11-03 04:13:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:16,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:16,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:16,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:13:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:16,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:13:16,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:16,713 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 04:13:16,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:16,833 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 04:13:16,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:16,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514248312] [2021-11-03 04:13:16,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514248312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:16,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:16,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:13:16,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896139010] [2021-11-03 04:13:16,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:16,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:16,839 INFO L87 Difference]: Start difference. First operand 4640 states and 8797 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 04:13:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:17,126 INFO L93 Difference]: Finished difference Result 9267 states and 17575 transitions. [2021-11-03 04:13:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:13:17,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 29 [2021-11-03 04:13:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:17,165 INFO L225 Difference]: With dead ends: 9267 [2021-11-03 04:13:17,166 INFO L226 Difference]: Without dead ends: 4640 [2021-11-03 04:13:17,177 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 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 04:13:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4640 states. [2021-11-03 04:13:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4640 to 4640. [2021-11-03 04:13:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4635 states have (on average 1.896655879180151) internal successors, (8791), 4639 states have internal predecessors, (8791), 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 04:13:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 8791 transitions. [2021-11-03 04:13:17,377 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 8791 transitions. Word has length 29 [2021-11-03 04:13:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:17,378 INFO L470 AbstractCegarLoop]: Abstraction has 4640 states and 8791 transitions. [2021-11-03 04:13:17,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 04:13:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 8791 transitions. [2021-11-03 04:13:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 04:13:17,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:17,381 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 04:13:17,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:17,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:17,598 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 04:13:17,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1347733051, now seen corresponding path program 1 times [2021-11-03 04:13:17,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:17,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962693259] [2021-11-03 04:13:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:17,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:17,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:17,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:13:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:17,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:13:17,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:18,081 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 04:13:18,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:18,208 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 04:13:18,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:18,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962693259] [2021-11-03 04:13:18,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962693259] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:18,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:18,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:13:18,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504755613] [2021-11-03 04:13:18,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:13:18,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:18,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:13:18,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:13:18,212 INFO L87 Difference]: Start difference. First operand 4640 states and 8791 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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 04:13:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:18,846 INFO L93 Difference]: Finished difference Result 9231 states and 17498 transitions. [2021-11-03 04:13:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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 04:13:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:18,884 INFO L225 Difference]: With dead ends: 9231 [2021-11-03 04:13:18,884 INFO L226 Difference]: Without dead ends: 4613 [2021-11-03 04:13:18,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 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 04:13:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-11-03 04:13:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4613. [2021-11-03 04:13:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4608 states have (on average 1.8956163194444444) internal successors, (8735), 4612 states have internal predecessors, (8735), 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 04:13:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 8735 transitions. [2021-11-03 04:13:19,113 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 8735 transitions. Word has length 34 [2021-11-03 04:13:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:19,113 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 8735 transitions. [2021-11-03 04:13:19,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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 04:13:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 8735 transitions. [2021-11-03 04:13:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 04:13:19,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:19,116 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] [2021-11-03 04:13:19,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:19,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:19,333 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 04:13:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:19,337 INFO L85 PathProgramCache]: Analyzing trace with hash -306910237, now seen corresponding path program 1 times [2021-11-03 04:13:19,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:19,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151034112] [2021-11-03 04:13:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:19,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:19,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:19,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:19,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:13:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:19,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:13:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:19,892 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 04:13:19,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:20,029 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 04:13:20,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:20,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151034112] [2021-11-03 04:13:20,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151034112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:20,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:20,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:13:20,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645398578] [2021-11-03 04:13:20,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:20,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:20,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:20,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:20,035 INFO L87 Difference]: Start difference. First operand 4613 states and 8735 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 04:13:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:20,402 INFO L93 Difference]: Finished difference Result 9204 states and 17442 transitions. [2021-11-03 04:13:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:13:20,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 35 [2021-11-03 04:13:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:20,439 INFO L225 Difference]: With dead ends: 9204 [2021-11-03 04:13:20,440 INFO L226 Difference]: Without dead ends: 4613 [2021-11-03 04:13:20,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 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 04:13:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-11-03 04:13:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4613. [2021-11-03 04:13:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4608 states have (on average 1.8943142361111112) internal successors, (8729), 4612 states have internal predecessors, (8729), 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 04:13:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 8729 transitions. [2021-11-03 04:13:20,662 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 8729 transitions. Word has length 35 [2021-11-03 04:13:20,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:20,663 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 8729 transitions. [2021-11-03 04:13:20,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 04:13:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 8729 transitions. [2021-11-03 04:13:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:13:20,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:20,666 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 04:13:20,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:20,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:20,883 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 04:13:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -492095310, now seen corresponding path program 1 times [2021-11-03 04:13:20,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:20,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831582557] [2021-11-03 04:13:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:20,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:20,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:20,887 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:20,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:13:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:21,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:13:21,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:21,486 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 04:13:21,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:21,653 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 04:13:21,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:21,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831582557] [2021-11-03 04:13:21,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831582557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:21,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:21,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:13:21,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609604228] [2021-11-03 04:13:21,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:13:21,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:21,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:13:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:13:21,657 INFO L87 Difference]: Start difference. First operand 4613 states and 8729 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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 04:13:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:22,262 INFO L93 Difference]: Finished difference Result 9198 states and 17425 transitions. [2021-11-03 04:13:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:13:22,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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 04:13:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:22,321 INFO L225 Difference]: With dead ends: 9198 [2021-11-03 04:13:22,321 INFO L226 Difference]: Without dead ends: 4610 [2021-11-03 04:13:22,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 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 04:13:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-11-03 04:13:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2021-11-03 04:13:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4605 states have (on average 1.8938110749185668) internal successors, (8721), 4609 states have internal predecessors, (8721), 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 04:13:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 8721 transitions. [2021-11-03 04:13:22,588 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 8721 transitions. Word has length 40 [2021-11-03 04:13:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:22,589 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 8721 transitions. [2021-11-03 04:13:22,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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 04:13:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 8721 transitions. [2021-11-03 04:13:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 04:13:22,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:22,591 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] [2021-11-03 04:13:22,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:22,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:22,806 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 04:13:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:22,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2106017566, now seen corresponding path program 1 times [2021-11-03 04:13:22,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:22,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101020967] [2021-11-03 04:13:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:22,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:22,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:22,809 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:22,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:13:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:23,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:13:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:23,725 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 04:13:23,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:23,944 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 04:13:23,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:23,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101020967] [2021-11-03 04:13:23,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101020967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:23,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:23,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:13:23,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583743744] [2021-11-03 04:13:23,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:23,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:23,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:23,947 INFO L87 Difference]: Start difference. First operand 4610 states and 8721 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:24,863 INFO L93 Difference]: Finished difference Result 12926 states and 24481 transitions. [2021-11-03 04:13:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:13:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 04:13:24,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:24,899 INFO L225 Difference]: With dead ends: 12926 [2021-11-03 04:13:24,899 INFO L226 Difference]: Without dead ends: 10579 [2021-11-03 04:13:24,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 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 04:13:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10579 states. [2021-11-03 04:13:25,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10579 to 6170. [2021-11-03 04:13:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 6165 states have (on average 1.8940794809407948) internal successors, (11677), 6169 states have internal predecessors, (11677), 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 04:13:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 11677 transitions. [2021-11-03 04:13:25,304 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 11677 transitions. Word has length 41 [2021-11-03 04:13:25,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:25,305 INFO L470 AbstractCegarLoop]: Abstraction has 6170 states and 11677 transitions. [2021-11-03 04:13:25,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:25,305 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 11677 transitions. [2021-11-03 04:13:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:13:25,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:25,311 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 04:13:25,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:25,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:25,526 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 04:13:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1676293061, now seen corresponding path program 1 times [2021-11-03 04:13:25,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:25,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028556531] [2021-11-03 04:13:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:25,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:25,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:25,532 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:25,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:13:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:26,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:13:26,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:26,342 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 04:13:26,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:26,579 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 04:13:26,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:26,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028556531] [2021-11-03 04:13:26,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028556531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:26,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:26,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 04:13:26,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238350269] [2021-11-03 04:13:26,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:13:26,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:13:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:13:26,582 INFO L87 Difference]: Start difference. First operand 6170 states and 11677 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 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 04:13:27,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:27,516 INFO L93 Difference]: Finished difference Result 11826 states and 22158 transitions. [2021-11-03 04:13:27,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:13:27,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 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 04:13:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:27,540 INFO L225 Difference]: With dead ends: 11826 [2021-11-03 04:13:27,541 INFO L226 Difference]: Without dead ends: 6821 [2021-11-03 04:13:27,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 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 04:13:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6821 states. [2021-11-03 04:13:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6821 to 4579. [2021-11-03 04:13:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4574 states have (on average 1.885439440314823) internal successors, (8624), 4578 states have internal predecessors, (8624), 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 04:13:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 8624 transitions. [2021-11-03 04:13:27,905 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 8624 transitions. Word has length 54 [2021-11-03 04:13:27,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:27,906 INFO L470 AbstractCegarLoop]: Abstraction has 4579 states and 8624 transitions. [2021-11-03 04:13:27,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 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 04:13:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 8624 transitions. [2021-11-03 04:13:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 04:13:27,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:27,910 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 04:13:27,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:28,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:28,127 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 04:13:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:28,128 INFO L85 PathProgramCache]: Analyzing trace with hash -920679150, now seen corresponding path program 1 times [2021-11-03 04:13:28,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:28,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89323749] [2021-11-03 04:13:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:28,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:28,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:28,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:28,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:13:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:28,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:13:28,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:28,941 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 04:13:28,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:29,127 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 04:13:29,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:29,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89323749] [2021-11-03 04:13:29,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89323749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:29,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:29,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:13:29,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994298914] [2021-11-03 04:13:29,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:13:29,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:29,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:13:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:13:29,130 INFO L87 Difference]: Start difference. First operand 4579 states and 8624 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 04:13:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:32,202 INFO L93 Difference]: Finished difference Result 18412 states and 34625 transitions. [2021-11-03 04:13:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:13:32,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 04:13:32,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:32,251 INFO L225 Difference]: With dead ends: 18412 [2021-11-03 04:13:32,251 INFO L226 Difference]: Without dead ends: 13876 [2021-11-03 04:13:32,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 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 04:13:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13876 states. [2021-11-03 04:13:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13876 to 4587. [2021-11-03 04:13:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4582 states have (on average 1.8838934962898297) internal successors, (8632), 4586 states have internal predecessors, (8632), 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 04:13:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 8632 transitions. [2021-11-03 04:13:32,606 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 8632 transitions. Word has length 55 [2021-11-03 04:13:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:32,606 INFO L470 AbstractCegarLoop]: Abstraction has 4587 states and 8632 transitions. [2021-11-03 04:13:32,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 04:13:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 8632 transitions. [2021-11-03 04:13:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 04:13:32,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:32,609 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 04:13:32,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:32,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:32,827 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 04:13:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:32,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1154382262, now seen corresponding path program 1 times [2021-11-03 04:13:32,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:32,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486170760] [2021-11-03 04:13:32,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:32,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:32,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:32,829 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:32,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:13:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:33,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:13:33,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:33,585 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 04:13:33,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:33,771 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 04:13:33,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:33,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486170760] [2021-11-03 04:13:33,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486170760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:33,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:33,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:13:33,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815304184] [2021-11-03 04:13:33,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:13:33,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:33,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:13:33,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:13:33,773 INFO L87 Difference]: Start difference. First operand 4587 states and 8632 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 04:13:41,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:41,631 INFO L93 Difference]: Finished difference Result 12889 states and 24198 transitions. [2021-11-03 04:13:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:13:41,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 04:13:41,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:41,660 INFO L225 Difference]: With dead ends: 12889 [2021-11-03 04:13:41,660 INFO L226 Difference]: Without dead ends: 9640 [2021-11-03 04:13:41,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 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 04:13:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9640 states. [2021-11-03 04:13:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9640 to 8593. [2021-11-03 04:13:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8593 states, 8588 states have (on average 1.8861201676758268) internal successors, (16198), 8592 states have internal predecessors, (16198), 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 04:13:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8593 states to 8593 states and 16198 transitions. [2021-11-03 04:13:42,101 INFO L78 Accepts]: Start accepts. Automaton has 8593 states and 16198 transitions. Word has length 56 [2021-11-03 04:13:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:42,102 INFO L470 AbstractCegarLoop]: Abstraction has 8593 states and 16198 transitions. [2021-11-03 04:13:42,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 04:13:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8593 states and 16198 transitions. [2021-11-03 04:13:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:13:42,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:42,106 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 04:13:42,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:42,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:42,323 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 04:13:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash -482526514, now seen corresponding path program 1 times [2021-11-03 04:13:42,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:42,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922091526] [2021-11-03 04:13:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:42,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:42,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:42,326 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:42,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:13:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:42,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:13:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:43,089 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 04:13:43,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:43,306 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 04:13:43,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:43,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922091526] [2021-11-03 04:13:43,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922091526] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:43,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:43,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:13:43,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771337243] [2021-11-03 04:13:43,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:43,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:43,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:43,308 INFO L87 Difference]: Start difference. First operand 8593 states and 16198 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 04:13:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:45,882 INFO L93 Difference]: Finished difference Result 16787 states and 31464 transitions. [2021-11-03 04:13:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:13:45,883 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 04:13:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:45,904 INFO L225 Difference]: With dead ends: 16787 [2021-11-03 04:13:45,904 INFO L226 Difference]: Without dead ends: 9524 [2021-11-03 04:13:45,917 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 04:13:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9524 states. [2021-11-03 04:13:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 8525. [2021-11-03 04:13:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8525 states, 8520 states have (on average 1.8748826291079812) internal successors, (15974), 8524 states have internal predecessors, (15974), 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 04:13:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8525 states to 8525 states and 15974 transitions. [2021-11-03 04:13:46,353 INFO L78 Accepts]: Start accepts. Automaton has 8525 states and 15974 transitions. Word has length 57 [2021-11-03 04:13:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:46,353 INFO L470 AbstractCegarLoop]: Abstraction has 8525 states and 15974 transitions. [2021-11-03 04:13:46,353 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 04:13:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8525 states and 15974 transitions. [2021-11-03 04:13:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:13:46,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:46,355 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:46,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:46,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:46,583 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 04:13:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:46,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1526979166, now seen corresponding path program 1 times [2021-11-03 04:13:46,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:46,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999890108] [2021-11-03 04:13:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:46,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:46,585 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:46,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:13:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:47,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:13:47,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:47,368 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 04:13:47,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:47,559 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 04:13:47,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:47,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999890108] [2021-11-03 04:13:47,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999890108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:47,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:47,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:13:47,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459436891] [2021-11-03 04:13:47,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:13:47,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:47,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:13:47,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:13:47,562 INFO L87 Difference]: Start difference. First operand 8525 states and 15974 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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 04:13:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:49,972 INFO L93 Difference]: Finished difference Result 62283 states and 116983 transitions. [2021-11-03 04:13:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:13:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 04:13:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:50,106 INFO L225 Difference]: With dead ends: 62283 [2021-11-03 04:13:50,106 INFO L226 Difference]: Without dead ends: 53797 [2021-11-03 04:13:50,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 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 04:13:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53797 states. [2021-11-03 04:13:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53797 to 16094. [2021-11-03 04:13:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16094 states, 16089 states have (on average 1.875691466219156) internal successors, (30178), 16093 states have internal predecessors, (30178), 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 04:13:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 30178 transitions. [2021-11-03 04:13:51,228 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 30178 transitions. Word has length 58 [2021-11-03 04:13:51,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:51,229 INFO L470 AbstractCegarLoop]: Abstraction has 16094 states and 30178 transitions. [2021-11-03 04:13:51,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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 04:13:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 30178 transitions. [2021-11-03 04:13:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:13:51,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:51,232 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:51,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-03 04:13:51,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:51,450 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 04:13:51,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1392965660, now seen corresponding path program 1 times [2021-11-03 04:13:51,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:51,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938335406] [2021-11-03 04:13:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:51,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:51,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:51,452 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:51,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:13:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:52,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:13:52,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:52,560 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 04:13:52,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:52,742 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 04:13:52,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:52,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938335406] [2021-11-03 04:13:52,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938335406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:52,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:52,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:13:52,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378576149] [2021-11-03 04:13:52,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:13:52,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:52,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:13:52,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:13:52,744 INFO L87 Difference]: Start difference. First operand 16094 states and 30178 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 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 04:13:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:54,650 INFO L93 Difference]: Finished difference Result 58531 states and 109973 transitions. [2021-11-03 04:13:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:13:54,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 04:13:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:54,739 INFO L225 Difference]: With dead ends: 58531 [2021-11-03 04:13:54,739 INFO L226 Difference]: Without dead ends: 46911 [2021-11-03 04:13:54,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 112 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 04:13:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46911 states. [2021-11-03 04:13:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46911 to 27157. [2021-11-03 04:13:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27157 states, 27152 states have (on average 1.8775044195639363) internal successors, (50978), 27156 states have internal predecessors, (50978), 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 04:13:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27157 states to 27157 states and 50978 transitions. [2021-11-03 04:13:56,405 INFO L78 Accepts]: Start accepts. Automaton has 27157 states and 50978 transitions. Word has length 58 [2021-11-03 04:13:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:56,406 INFO L470 AbstractCegarLoop]: Abstraction has 27157 states and 50978 transitions. [2021-11-03 04:13:56,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 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 04:13:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 27157 states and 50978 transitions. [2021-11-03 04:13:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:13:56,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:56,409 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:56,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:56,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:56,627 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 04:13:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash 174664870, now seen corresponding path program 1 times [2021-11-03 04:13:56,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:56,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215569338] [2021-11-03 04:13:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:56,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:56,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:56,630 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:56,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:13:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:57,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:13:57,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:57,467 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 04:13:57,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:57,723 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 04:13:57,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:57,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215569338] [2021-11-03 04:13:57,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215569338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:57,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:57,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:13:57,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884703655] [2021-11-03 04:13:57,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:13:57,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:13:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:13:57,726 INFO L87 Difference]: Start difference. First operand 27157 states and 50978 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 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 04:14:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:06,942 INFO L93 Difference]: Finished difference Result 171319 states and 322317 transitions. [2021-11-03 04:14:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:14:06,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:14:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:07,239 INFO L225 Difference]: With dead ends: 171319 [2021-11-03 04:14:07,239 INFO L226 Difference]: Without dead ends: 148636 [2021-11-03 04:14:07,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 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 04:14:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148636 states. [2021-11-03 04:14:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148636 to 47111. [2021-11-03 04:14:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47111 states, 47106 states have (on average 1.8793784231308113) internal successors, (88530), 47110 states have internal predecessors, (88530), 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 04:14:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47111 states to 47111 states and 88530 transitions. [2021-11-03 04:14:10,703 INFO L78 Accepts]: Start accepts. Automaton has 47111 states and 88530 transitions. Word has length 60 [2021-11-03 04:14:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:10,703 INFO L470 AbstractCegarLoop]: Abstraction has 47111 states and 88530 transitions. [2021-11-03 04:14:10,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 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 04:14:10,704 INFO L276 IsEmpty]: Start isEmpty. Operand 47111 states and 88530 transitions. [2021-11-03 04:14:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 04:14:10,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:10,708 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 04:14:10,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:10,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:10,922 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 04:14:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:10,922 INFO L85 PathProgramCache]: Analyzing trace with hash 756564839, now seen corresponding path program 1 times [2021-11-03 04:14:10,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:10,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387731900] [2021-11-03 04:14:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:10,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:10,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:10,925 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:10,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:14:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:11,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:14:11,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:11,841 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 04:14:11,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:11,995 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 04:14:11,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:11,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387731900] [2021-11-03 04:14:11,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387731900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:11,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:11,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:14:11,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243786608] [2021-11-03 04:14:11,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:14:11,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:11,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:14:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:14:11,998 INFO L87 Difference]: Start difference. First operand 47111 states and 88530 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 04:14:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:16,673 INFO L93 Difference]: Finished difference Result 116423 states and 218165 transitions. [2021-11-03 04:14:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:14:16,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 67 [2021-11-03 04:14:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:16,804 INFO L225 Difference]: With dead ends: 116423 [2021-11-03 04:14:16,804 INFO L226 Difference]: Without dead ends: 71146 [2021-11-03 04:14:16,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 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 04:14:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71146 states. [2021-11-03 04:14:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71146 to 46871. [2021-11-03 04:14:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46871 states, 46866 states have (on average 1.8703110997311483) internal successors, (87654), 46870 states have internal predecessors, (87654), 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 04:14:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46871 states to 46871 states and 87654 transitions. [2021-11-03 04:14:19,689 INFO L78 Accepts]: Start accepts. Automaton has 46871 states and 87654 transitions. Word has length 67 [2021-11-03 04:14:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:19,689 INFO L470 AbstractCegarLoop]: Abstraction has 46871 states and 87654 transitions. [2021-11-03 04:14:19,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 04:14:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 46871 states and 87654 transitions. [2021-11-03 04:14:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 04:14:19,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:19,692 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 04:14:19,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 04:14:19,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:19,894 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 04:14:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:19,895 INFO L85 PathProgramCache]: Analyzing trace with hash 834275882, now seen corresponding path program 1 times [2021-11-03 04:14:19,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:19,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829251723] [2021-11-03 04:14:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:19,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:19,898 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:19,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:14:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:14:20,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:20,751 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 04:14:20,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:20,948 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 04:14:20,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:20,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829251723] [2021-11-03 04:14:20,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829251723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:20,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:20,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:14:20,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917424639] [2021-11-03 04:14:20,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:14:20,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:14:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:14:20,952 INFO L87 Difference]: Start difference. First operand 46871 states and 87654 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 04:14:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:23,635 INFO L93 Difference]: Finished difference Result 89415 states and 167186 transitions. [2021-11-03 04:14:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:14:23,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 67 [2021-11-03 04:14:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:23,702 INFO L225 Difference]: With dead ends: 89415 [2021-11-03 04:14:23,702 INFO L226 Difference]: Without dead ends: 46886 [2021-11-03 04:14:23,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 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 04:14:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46886 states. [2021-11-03 04:14:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46886 to 46871. [2021-11-03 04:14:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46871 states, 46866 states have (on average 1.8647633678999702) internal successors, (87394), 46870 states have internal predecessors, (87394), 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 04:14:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46871 states to 46871 states and 87394 transitions. [2021-11-03 04:14:26,546 INFO L78 Accepts]: Start accepts. Automaton has 46871 states and 87394 transitions. Word has length 67 [2021-11-03 04:14:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:26,547 INFO L470 AbstractCegarLoop]: Abstraction has 46871 states and 87394 transitions. [2021-11-03 04:14:26,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 04:14:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 46871 states and 87394 transitions. [2021-11-03 04:14:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:14:26,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:26,549 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:14:26,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:26,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:26,750 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 04:14:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:26,750 INFO L85 PathProgramCache]: Analyzing trace with hash 66754689, now seen corresponding path program 1 times [2021-11-03 04:14:26,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:26,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602102975] [2021-11-03 04:14:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:26,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:26,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:26,752 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:26,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ce00a0-a1ff-4c2d-a408-151f79b7ecda/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:14:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:27,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:14:27,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:27,704 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 04:14:27,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:27,992 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 04:14:27,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:27,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602102975] [2021-11-03 04:14:27,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602102975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:27,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:27,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:14:27,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40887643] [2021-11-03 04:14:27,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:14:27,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:27,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:14:27,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:14:27,995 INFO L87 Difference]: Start difference. First operand 46871 states and 87394 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)