./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.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_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/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_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/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_d26b7979-25e3-44b6-b376-61588b0f8d10/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 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:46:59,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:46:59,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:46:59,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:46:59,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:46:59,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:46:59,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:46:59,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:46:59,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:46:59,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:46:59,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:46:59,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:46:59,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:46:59,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:46:59,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:46:59,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:46:59,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:46:59,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:46:59,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:46:59,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:46:59,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:46:59,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:46:59,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:46:59,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:46:59,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:46:59,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:46:59,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:46:59,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:46:59,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:46:59,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:46:59,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:46:59,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:46:59,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:46:59,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:46:59,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:46:59,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:46:59,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:46:59,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:46:59,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:46:59,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:46:59,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:46:59,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:46:59,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:46:59,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:46:59,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:46:59,234 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:46:59,234 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:46:59,234 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:46:59,235 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:46:59,235 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:46:59,235 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:46:59,235 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:46:59,236 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:46:59,237 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:46:59,237 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:46:59,237 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:46:59,237 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:46:59,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:46:59,238 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:46:59,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:46:59,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:46:59,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:46:59,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:46:59,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:46:59,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:46:59,240 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:46:59,240 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:46:59,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:46:59,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:46:59,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:46:59,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:46:59,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:46:59,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:46:59,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:46:59,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:46:59,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:46:59,243 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:46:59,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:46:59,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:46:59,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:46:59,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:46:59,244 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_d26b7979-25e3-44b6-b376-61588b0f8d10/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a [2021-11-03 05:46:59,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:46:59,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:46:59,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:46:59,558 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:46:59,559 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:46:59,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2021-11-03 05:46:59,621 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/data/bec46c12d/1a994ef2d2724e8197ae64aaadc48930/FLAG3bb5777e5 [2021-11-03 05:47:00,244 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:47:00,245 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2021-11-03 05:47:00,290 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/data/bec46c12d/1a994ef2d2724e8197ae64aaadc48930/FLAG3bb5777e5 [2021-11-03 05:47:00,435 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/data/bec46c12d/1a994ef2d2724e8197ae64aaadc48930 [2021-11-03 05:47:00,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:47:00,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:47:00,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:00,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:47:00,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:47:00,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:00" (1/1) ... [2021-11-03 05:47:00,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@781baa50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:00, skipping insertion in model container [2021-11-03 05:47:00,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:00" (1/1) ... [2021-11-03 05:47:00,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:47:00,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:47:00,969 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_d26b7979-25e3-44b6-b376-61588b0f8d10/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2021-11-03 05:47:01,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:01,190 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 05:47:01,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4bf910cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:01, skipping insertion in model container [2021-11-03 05:47:01,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:01,192 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:47:01,194 INFO L168 Benchmark]: Toolchain (without parser) took 751.73 ms. Allocated memory is still 111.1 MB. Free memory was 69.4 MB in the beginning and 71.8 MB in the end (delta: -2.4 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:47:01,195 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 111.1 MB. Free memory is still 88.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:47:01,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 748.15 ms. Allocated memory is still 111.1 MB. Free memory was 69.3 MB in the beginning and 71.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:47:01,199 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 111.1 MB. Free memory is still 88.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 748.15 ms. Allocated memory is still 111.1 MB. Free memory was 69.3 MB in the beginning and 71.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 475]: 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_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/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_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/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_d26b7979-25e3-44b6-b376-61588b0f8d10/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 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:47:03,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:47:03,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:47:03,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:47:03,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:47:03,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:47:03,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:47:03,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:47:03,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:47:03,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:47:03,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:47:03,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:47:03,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:47:03,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:47:03,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:47:03,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:47:03,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:47:03,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:47:03,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:47:03,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:47:03,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:47:03,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:47:03,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:47:03,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:47:03,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:47:03,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:47:03,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:47:03,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:47:03,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:47:03,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:47:03,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:47:03,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:47:03,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:47:03,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:47:03,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:47:03,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:47:03,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:47:03,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:47:03,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:47:03,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:47:03,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:47:03,435 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:47:03,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:47:03,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:47:03,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:47:03,475 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:47:03,476 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:47:03,476 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:47:03,476 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:47:03,476 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:47:03,476 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:47:03,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:47:03,479 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:47:03,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:47:03,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:47:03,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:47:03,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:47:03,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:47:03,480 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:47:03,480 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:47:03,480 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:47:03,480 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:47:03,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:47:03,481 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:47:03,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:47:03,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:47:03,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:47:03,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:47:03,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:47:03,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:47:03,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:47:03,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:47:03,482 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:47:03,483 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:47:03,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:47:03,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:47:03,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:47:03,484 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_d26b7979-25e3-44b6-b376-61588b0f8d10/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a [2021-11-03 05:47:03,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:47:03,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:47:03,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:47:03,837 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:47:03,838 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:47:03,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2021-11-03 05:47:03,901 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/data/a5958ce4c/6ebfa58ad3ee48c4a5d0afd9230adc79/FLAG423bb2473 [2021-11-03 05:47:04,530 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:47:04,531 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2021-11-03 05:47:04,560 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/data/a5958ce4c/6ebfa58ad3ee48c4a5d0afd9230adc79/FLAG423bb2473 [2021-11-03 05:47:04,741 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/data/a5958ce4c/6ebfa58ad3ee48c4a5d0afd9230adc79 [2021-11-03 05:47:04,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:47:04,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:47:04,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:04,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:47:04,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:47:04,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:04" (1/1) ... [2021-11-03 05:47:04,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e9e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:04, skipping insertion in model container [2021-11-03 05:47:04,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:04" (1/1) ... [2021-11-03 05:47:04,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:47:04,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:47:05,316 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_d26b7979-25e3-44b6-b376-61588b0f8d10/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2021-11-03 05:47:05,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:05,511 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:47:05,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:47:05,574 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_d26b7979-25e3-44b6-b376-61588b0f8d10/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2021-11-03 05:47:05,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:05,653 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:47:05,729 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_d26b7979-25e3-44b6-b376-61588b0f8d10/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2021-11-03 05:47:05,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:05,860 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:47:05,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05 WrapperNode [2021-11-03 05:47:05,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:05,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:47:05,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:47:05,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:47:05,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (1/1) ... [2021-11-03 05:47:05,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (1/1) ... [2021-11-03 05:47:06,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:47:06,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:47:06,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:47:06,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:47:06,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (1/1) ... [2021-11-03 05:47:06,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (1/1) ... [2021-11-03 05:47:06,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (1/1) ... [2021-11-03 05:47:06,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (1/1) ... [2021-11-03 05:47:06,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (1/1) ... [2021-11-03 05:47:06,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (1/1) ... [2021-11-03 05:47:06,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (1/1) ... [2021-11-03 05:47:06,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:47:06,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:47:06,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:47:06,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:47:06,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (1/1) ... [2021-11-03 05:47:06,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:47:06,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:47:06,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:47:06,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:47:06,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:47:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:47:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:47:06,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:47:14,412 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:47:14,413 INFO L299 CfgBuilder]: Removed 589 assume(true) statements. [2021-11-03 05:47:14,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:47:14 BoogieIcfgContainer [2021-11-03 05:47:14,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:47:14,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:47:14,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:47:14,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:47:14,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:47:04" (1/3) ... [2021-11-03 05:47:14,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f65f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:47:14, skipping insertion in model container [2021-11-03 05:47:14,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:05" (2/3) ... [2021-11-03 05:47:14,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f65f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:47:14, skipping insertion in model container [2021-11-03 05:47:14,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:47:14" (3/3) ... [2021-11-03 05:47:14,428 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product25.cil.c [2021-11-03 05:47:14,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:47:14,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 05:47:14,499 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:47:14,507 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:47:14,508 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 05:47:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 2512 states, 2506 states have (on average 1.892657621707901) internal successors, (4743), 2511 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 05:47:14,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:14,631 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] [2021-11-03 05:47:14,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:14,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1633009766, now seen corresponding path program 1 times [2021-11-03 05:47:14,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:14,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455681240] [2021-11-03 05:47:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:14,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:14,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:14,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:14,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:47:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:14,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:47:14,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:15,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:15,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:15,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455681240] [2021-11-03 05:47:15,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455681240] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:15,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:15,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:47:15,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144850713] [2021-11-03 05:47:15,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:47:15,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:15,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:47:15,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:47:15,238 INFO L87 Difference]: Start difference. First operand has 2512 states, 2506 states have (on average 1.892657621707901) internal successors, (4743), 2511 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 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 05:47:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:15,377 INFO L93 Difference]: Finished difference Result 2531 states and 4766 transitions. [2021-11-03 05:47:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:47:15,380 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 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 37 [2021-11-03 05:47:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:15,424 INFO L225 Difference]: With dead ends: 2531 [2021-11-03 05:47:15,424 INFO L226 Difference]: Without dead ends: 2508 [2021-11-03 05:47:15,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:47:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-11-03 05:47:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2508. [2021-11-03 05:47:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2503 states have (on average 1.8901318417898523) internal successors, (4731), 2507 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4731 transitions. [2021-11-03 05:47:15,593 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4731 transitions. Word has length 37 [2021-11-03 05:47:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:15,593 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 4731 transitions. [2021-11-03 05:47:15,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 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 05:47:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4731 transitions. [2021-11-03 05:47:15,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 05:47:15,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:15,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:15,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:47:15,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:15,813 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:15,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1228149007, now seen corresponding path program 1 times [2021-11-03 05:47:15,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:15,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577590488] [2021-11-03 05:47:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:15,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:15,830 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:15,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:47:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:47:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:16,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:16,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:16,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577590488] [2021-11-03 05:47:16,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577590488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:16,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:16,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:47:16,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850815779] [2021-11-03 05:47:16,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:16,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:16,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:16,422 INFO L87 Difference]: Start difference. First operand 2508 states and 4731 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:16,597 INFO L93 Difference]: Finished difference Result 5003 states and 9443 transitions. [2021-11-03 05:47:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:47:16,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-03 05:47:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:16,615 INFO L225 Difference]: With dead ends: 5003 [2021-11-03 05:47:16,615 INFO L226 Difference]: Without dead ends: 2508 [2021-11-03 05:47:16,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-11-03 05:47:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2508. [2021-11-03 05:47:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2503 states have (on average 1.8877347183379944) internal successors, (4725), 2507 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4725 transitions. [2021-11-03 05:47:16,704 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4725 transitions. Word has length 39 [2021-11-03 05:47:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:16,705 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 4725 transitions. [2021-11-03 05:47:16,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4725 transitions. [2021-11-03 05:47:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 05:47:16,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:16,708 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] [2021-11-03 05:47:16,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:16,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:16,924 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash -56341435, now seen corresponding path program 1 times [2021-11-03 05:47:16,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:16,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534351443] [2021-11-03 05:47:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:16,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:16,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:16,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:16,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:47:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:17,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:47:17,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:17,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:17,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:17,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534351443] [2021-11-03 05:47:17,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534351443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:17,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:17,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:47:17,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845202855] [2021-11-03 05:47:17,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:47:17,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:47:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:47:17,523 INFO L87 Difference]: Start difference. First operand 2508 states and 4725 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:17,724 INFO L93 Difference]: Finished difference Result 4967 states and 9366 transitions. [2021-11-03 05:47:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:47:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-03 05:47:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:17,741 INFO L225 Difference]: With dead ends: 4967 [2021-11-03 05:47:17,742 INFO L226 Difference]: Without dead ends: 2481 [2021-11-03 05:47:17,747 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:47:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-03 05:47:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-03 05:47:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2476 states have (on average 1.885702746365105) internal successors, (4669), 2480 states have internal predecessors, (4669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4669 transitions. [2021-11-03 05:47:17,903 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4669 transitions. Word has length 44 [2021-11-03 05:47:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:17,903 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 4669 transitions. [2021-11-03 05:47:17,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4669 transitions. [2021-11-03 05:47:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 05:47:17,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:17,909 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] [2021-11-03 05:47:17,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:18,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:18,124 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:18,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2055500003, now seen corresponding path program 1 times [2021-11-03 05:47:18,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:18,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080076761] [2021-11-03 05:47:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:18,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:18,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:18,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:18,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:47:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:47:18,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:18,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:18,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:18,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080076761] [2021-11-03 05:47:18,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080076761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:18,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:18,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:47:18,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751867295] [2021-11-03 05:47:18,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:18,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:18,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:18,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:18,784 INFO L87 Difference]: Start difference. First operand 2481 states and 4669 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:18,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:18,927 INFO L93 Difference]: Finished difference Result 4940 states and 9310 transitions. [2021-11-03 05:47:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:47:18,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 45 [2021-11-03 05:47:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:18,944 INFO L225 Difference]: With dead ends: 4940 [2021-11-03 05:47:18,944 INFO L226 Difference]: Without dead ends: 2481 [2021-11-03 05:47:18,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-03 05:47:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-03 05:47:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2476 states have (on average 1.8832794830371566) internal successors, (4663), 2480 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4663 transitions. [2021-11-03 05:47:19,074 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4663 transitions. Word has length 45 [2021-11-03 05:47:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:19,074 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 4663 transitions. [2021-11-03 05:47:19,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4663 transitions. [2021-11-03 05:47:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:47:19,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:19,077 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] [2021-11-03 05:47:19,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:19,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:19,292 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2113423090, now seen corresponding path program 1 times [2021-11-03 05:47:19,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:19,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660458966] [2021-11-03 05:47:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:19,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:19,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:19,300 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:19,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:47:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:19,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:47:19,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:19,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:19,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:19,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660458966] [2021-11-03 05:47:20,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660458966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:20,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:20,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:47:20,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471216803] [2021-11-03 05:47:20,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:47:20,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:20,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:47:20,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:47:20,002 INFO L87 Difference]: Start difference. First operand 2481 states and 4663 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:20,208 INFO L93 Difference]: Finished difference Result 4934 states and 9293 transitions. [2021-11-03 05:47:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:47:20,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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 50 [2021-11-03 05:47:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:20,224 INFO L225 Difference]: With dead ends: 4934 [2021-11-03 05:47:20,224 INFO L226 Difference]: Without dead ends: 2478 [2021-11-03 05:47:20,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:47:20,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-11-03 05:47:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2478. [2021-11-03 05:47:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2473 states have (on average 1.8823291548726244) internal successors, (4655), 2477 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 4655 transitions. [2021-11-03 05:47:20,369 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 4655 transitions. Word has length 50 [2021-11-03 05:47:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:20,369 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 4655 transitions. [2021-11-03 05:47:20,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 4655 transitions. [2021-11-03 05:47:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 05:47:20,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:20,374 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] [2021-11-03 05:47:20,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:20,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:20,591 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:20,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:20,591 INFO L85 PathProgramCache]: Analyzing trace with hash -976794846, now seen corresponding path program 1 times [2021-11-03 05:47:20,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:20,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307652913] [2021-11-03 05:47:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:20,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:20,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:20,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:20,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:47:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:20,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:47:20,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:21,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:21,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:21,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307652913] [2021-11-03 05:47:21,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307652913] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:21,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:21,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:47:21,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243939307] [2021-11-03 05:47:21,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:47:21,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:47:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:47:21,308 INFO L87 Difference]: Start difference. First operand 2478 states and 4655 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:23,125 INFO L93 Difference]: Finished difference Result 9968 states and 18723 transitions. [2021-11-03 05:47:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:47:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-03 05:47:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:23,172 INFO L225 Difference]: With dead ends: 9968 [2021-11-03 05:47:23,172 INFO L226 Difference]: Without dead ends: 7530 [2021-11-03 05:47:23,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:47:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7530 states. [2021-11-03 05:47:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7530 to 2482. [2021-11-03 05:47:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2477 states have (on average 1.8809043197416229) internal successors, (4659), 2481 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 4659 transitions. [2021-11-03 05:47:23,342 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 4659 transitions. Word has length 51 [2021-11-03 05:47:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:23,343 INFO L470 AbstractCegarLoop]: Abstraction has 2482 states and 4659 transitions. [2021-11-03 05:47:23,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 4659 transitions. [2021-11-03 05:47:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:47:23,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:23,346 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:23,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:23,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:23,562 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:23,563 INFO L85 PathProgramCache]: Analyzing trace with hash 559828842, now seen corresponding path program 1 times [2021-11-03 05:47:23,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:23,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42142221] [2021-11-03 05:47:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:23,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:23,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:23,568 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:23,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:47:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:47:24,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:24,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:24,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:24,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42142221] [2021-11-03 05:47:24,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42142221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:24,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:24,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:47:24,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493013390] [2021-11-03 05:47:24,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:47:24,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:47:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:47:24,310 INFO L87 Difference]: Start difference. First operand 2482 states and 4659 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:30,796 INFO L93 Difference]: Finished difference Result 6729 states and 12592 transitions. [2021-11-03 05:47:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:47:30,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 05:47:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:30,827 INFO L225 Difference]: With dead ends: 6729 [2021-11-03 05:47:30,828 INFO L226 Difference]: Without dead ends: 5299 [2021-11-03 05:47:30,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:47:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2021-11-03 05:47:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 4608. [2021-11-03 05:47:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4603 states have (on average 1.8833369541603302) internal successors, (8669), 4607 states have internal predecessors, (8669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 8669 transitions. [2021-11-03 05:47:31,099 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 8669 transitions. Word has length 52 [2021-11-03 05:47:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:31,101 INFO L470 AbstractCegarLoop]: Abstraction has 4608 states and 8669 transitions. [2021-11-03 05:47:31,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 8669 transitions. [2021-11-03 05:47:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:47:31,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:31,105 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:31,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:31,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:31,319 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash 285251702, now seen corresponding path program 1 times [2021-11-03 05:47:31,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:31,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19379659] [2021-11-03 05:47:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:31,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:31,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:31,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:31,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:47:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:31,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:47:31,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:31,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:32,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:32,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19379659] [2021-11-03 05:47:32,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19379659] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:32,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:32,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:47:32,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171421067] [2021-11-03 05:47:32,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:32,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:32,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:32,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:32,077 INFO L87 Difference]: Start difference. First operand 4608 states and 8669 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:33,614 INFO L93 Difference]: Finished difference Result 8624 states and 16131 transitions. [2021-11-03 05:47:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:47:33,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 05:47:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:33,633 INFO L225 Difference]: With dead ends: 8624 [2021-11-03 05:47:33,634 INFO L226 Difference]: Without dead ends: 5060 [2021-11-03 05:47:33,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:47:33,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-11-03 05:47:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 4511. [2021-11-03 05:47:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 4506 states have (on average 1.8681757656458056) internal successors, (8418), 4510 states have internal predecessors, (8418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 8418 transitions. [2021-11-03 05:47:33,883 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 8418 transitions. Word has length 53 [2021-11-03 05:47:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:33,884 INFO L470 AbstractCegarLoop]: Abstraction has 4511 states and 8418 transitions. [2021-11-03 05:47:33,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 8418 transitions. [2021-11-03 05:47:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:47:33,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:33,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:33,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 05:47:34,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:34,102 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:34,103 INFO L85 PathProgramCache]: Analyzing trace with hash -679920574, now seen corresponding path program 1 times [2021-11-03 05:47:34,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:34,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971786575] [2021-11-03 05:47:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:34,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:34,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:34,109 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:34,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:47:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:34,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:47:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:34,751 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 05:47:34,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:34,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:34,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971786575] [2021-11-03 05:47:34,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971786575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:34,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:34,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:47:34,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209665207] [2021-11-03 05:47:34,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:47:34,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:34,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:47:34,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:47:34,917 INFO L87 Difference]: Start difference. First operand 4511 states and 8418 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:35,976 INFO L93 Difference]: Finished difference Result 32149 states and 60220 transitions. [2021-11-03 05:47:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:47:35,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 05:47:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:36,046 INFO L225 Difference]: With dead ends: 32149 [2021-11-03 05:47:36,046 INFO L226 Difference]: Without dead ends: 27674 [2021-11-03 05:47:36,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:47:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27674 states. [2021-11-03 05:47:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27674 to 8441. [2021-11-03 05:47:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8441 states, 8436 states have (on average 1.8724513987671882) internal successors, (15796), 8440 states have internal predecessors, (15796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8441 states to 8441 states and 15796 transitions. [2021-11-03 05:47:36,601 INFO L78 Accepts]: Start accepts. Automaton has 8441 states and 15796 transitions. Word has length 54 [2021-11-03 05:47:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:36,601 INFO L470 AbstractCegarLoop]: Abstraction has 8441 states and 15796 transitions. [2021-11-03 05:47:36,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 8441 states and 15796 transitions. [2021-11-03 05:47:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:47:36,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:36,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:36,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:36,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:36,819 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:36,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1809608388, now seen corresponding path program 1 times [2021-11-03 05:47:36,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:36,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950272263] [2021-11-03 05:47:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:36,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:36,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:36,827 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:36,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:47:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:47:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:37,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:37,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:37,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950272263] [2021-11-03 05:47:37,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950272263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:37,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:37,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:47:37,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942151480] [2021-11-03 05:47:37,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:37,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:37,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:37,678 INFO L87 Difference]: Start difference. First operand 8441 states and 15796 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:38,475 INFO L93 Difference]: Finished difference Result 25650 states and 48038 transitions. [2021-11-03 05:47:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:47:38,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 05:47:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:38,517 INFO L225 Difference]: With dead ends: 25650 [2021-11-03 05:47:38,517 INFO L226 Difference]: Without dead ends: 20830 [2021-11-03 05:47:38,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:47:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20830 states. [2021-11-03 05:47:39,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20830 to 12992. [2021-11-03 05:47:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12992 states, 12987 states have (on average 1.872872872872873) internal successors, (24323), 12991 states have internal predecessors, (24323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12992 states to 12992 states and 24323 transitions. [2021-11-03 05:47:39,317 INFO L78 Accepts]: Start accepts. Automaton has 12992 states and 24323 transitions. Word has length 54 [2021-11-03 05:47:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:39,319 INFO L470 AbstractCegarLoop]: Abstraction has 12992 states and 24323 transitions. [2021-11-03 05:47:39,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 12992 states and 24323 transitions. [2021-11-03 05:47:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:47:39,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:39,321 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:39,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:39,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:39,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:39,541 INFO L85 PathProgramCache]: Analyzing trace with hash -554203782, now seen corresponding path program 1 times [2021-11-03 05:47:39,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:39,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075022852] [2021-11-03 05:47:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:39,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:39,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:39,546 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:39,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:47:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:40,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:47:40,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:40,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:40,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:40,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075022852] [2021-11-03 05:47:40,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075022852] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:40,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:40,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:47:40,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666080250] [2021-11-03 05:47:40,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:47:40,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:40,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:47:40,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:47:40,421 INFO L87 Difference]: Start difference. First operand 12992 states and 24323 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:43,036 INFO L93 Difference]: Finished difference Result 70612 states and 132473 transitions. [2021-11-03 05:47:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:47:43,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-03 05:47:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:43,146 INFO L225 Difference]: With dead ends: 70612 [2021-11-03 05:47:43,147 INFO L226 Difference]: Without dead ends: 61241 [2021-11-03 05:47:43,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:47:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61241 states. [2021-11-03 05:47:44,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61241 to 20872. [2021-11-03 05:47:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20872 states, 20867 states have (on average 1.8746345905017492) internal successors, (39118), 20871 states have internal predecessors, (39118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20872 states to 20872 states and 39118 transitions. [2021-11-03 05:47:44,408 INFO L78 Accepts]: Start accepts. Automaton has 20872 states and 39118 transitions. Word has length 56 [2021-11-03 05:47:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:44,408 INFO L470 AbstractCegarLoop]: Abstraction has 20872 states and 39118 transitions. [2021-11-03 05:47:44,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 20872 states and 39118 transitions. [2021-11-03 05:47:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 05:47:44,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:44,411 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] [2021-11-03 05:47:44,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:44,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:44,627 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:44,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash 775229, now seen corresponding path program 1 times [2021-11-03 05:47:44,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:44,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003985404] [2021-11-03 05:47:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:44,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:44,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:44,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:44,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:47:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:45,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:47:45,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:45,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:45,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:45,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003985404] [2021-11-03 05:47:45,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003985404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:45,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:45,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:47:45,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590162284] [2021-11-03 05:47:45,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:45,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:45,408 INFO L87 Difference]: Start difference. First operand 20872 states and 39118 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:47,041 INFO L93 Difference]: Finished difference Result 50354 states and 94057 transitions. [2021-11-03 05:47:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:47:47,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 63 [2021-11-03 05:47:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:47,094 INFO L225 Difference]: With dead ends: 50354 [2021-11-03 05:47:47,094 INFO L226 Difference]: Without dead ends: 31053 [2021-11-03 05:47:47,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31053 states. [2021-11-03 05:47:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31053 to 20749. [2021-11-03 05:47:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20749 states, 20744 states have (on average 1.864105283455457) internal successors, (38669), 20748 states have internal predecessors, (38669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20749 states to 20749 states and 38669 transitions. [2021-11-03 05:47:48,034 INFO L78 Accepts]: Start accepts. Automaton has 20749 states and 38669 transitions. Word has length 63 [2021-11-03 05:47:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:48,034 INFO L470 AbstractCegarLoop]: Abstraction has 20749 states and 38669 transitions. [2021-11-03 05:47:48,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20749 states and 38669 transitions. [2021-11-03 05:47:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 05:47:48,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:48,037 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] [2021-11-03 05:47:48,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:48,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:48,252 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1250208026, now seen corresponding path program 1 times [2021-11-03 05:47:48,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:48,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998851932] [2021-11-03 05:47:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:48,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:48,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:48,255 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:48,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:47:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:48,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:47:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:48,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:49,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:49,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998851932] [2021-11-03 05:47:49,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998851932] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:49,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:49,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:47:49,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423694423] [2021-11-03 05:47:49,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:49,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:49,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:49,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:49,035 INFO L87 Difference]: Start difference. First operand 20749 states and 38669 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:49,749 INFO L93 Difference]: Finished difference Result 38021 states and 70799 transitions. [2021-11-03 05:47:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:47:49,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 63 [2021-11-03 05:47:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:49,772 INFO L225 Difference]: With dead ends: 38021 [2021-11-03 05:47:49,772 INFO L226 Difference]: Without dead ends: 20764 [2021-11-03 05:47:49,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20764 states. [2021-11-03 05:47:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20764 to 20749. [2021-11-03 05:47:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20749 states, 20744 states have (on average 1.857259930582337) internal successors, (38527), 20748 states have internal predecessors, (38527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20749 states to 20749 states and 38527 transitions. [2021-11-03 05:47:50,593 INFO L78 Accepts]: Start accepts. Automaton has 20749 states and 38527 transitions. Word has length 63 [2021-11-03 05:47:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:50,593 INFO L470 AbstractCegarLoop]: Abstraction has 20749 states and 38527 transitions. [2021-11-03 05:47:50,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 20749 states and 38527 transitions. [2021-11-03 05:47:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:47:50,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:50,595 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] [2021-11-03 05:47:50,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 05:47:50,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:50,810 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1104184383, now seen corresponding path program 1 times [2021-11-03 05:47:50,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:50,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884278005] [2021-11-03 05:47:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:50,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:50,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:50,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:50,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:47:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:51,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:47:51,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:51,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:51,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:51,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884278005] [2021-11-03 05:47:51,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884278005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:51,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:51,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:47:51,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288933089] [2021-11-03 05:47:51,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:47:51,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:51,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:47:51,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:47:51,794 INFO L87 Difference]: Start difference. First operand 20749 states and 38527 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:54,810 INFO L93 Difference]: Finished difference Result 59670 states and 110701 transitions. [2021-11-03 05:47:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:47:54,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 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 64 [2021-11-03 05:47:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:54,875 INFO L225 Difference]: With dead ends: 59670 [2021-11-03 05:47:54,876 INFO L226 Difference]: Without dead ends: 42714 [2021-11-03 05:47:54,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:47:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42714 states. [2021-11-03 05:47:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42714 to 17161. [2021-11-03 05:47:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17161 states, 17156 states have (on average 1.8492072744229424) internal successors, (31725), 17160 states have internal predecessors, (31725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17161 states to 17161 states and 31725 transitions. [2021-11-03 05:47:55,720 INFO L78 Accepts]: Start accepts. Automaton has 17161 states and 31725 transitions. Word has length 64 [2021-11-03 05:47:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:55,720 INFO L470 AbstractCegarLoop]: Abstraction has 17161 states and 31725 transitions. [2021-11-03 05:47:55,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 17161 states and 31725 transitions. [2021-11-03 05:47:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:47:55,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:55,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:55,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:55,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:55,924 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:47:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:55,926 INFO L85 PathProgramCache]: Analyzing trace with hash 517378369, now seen corresponding path program 1 times [2021-11-03 05:47:55,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:55,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660864803] [2021-11-03 05:47:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:55,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:55,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:55,932 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:55,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:47:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:56,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:47:56,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:56,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:56,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:56,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660864803] [2021-11-03 05:47:56,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660864803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:56,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:56,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:47:56,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900702060] [2021-11-03 05:47:56,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:56,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:56,855 INFO L87 Difference]: Start difference. First operand 17161 states and 31725 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:58,895 INFO L93 Difference]: Finished difference Result 65586 states and 121299 transitions. [2021-11-03 05:47:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:47:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 05:47:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:58,948 INFO L225 Difference]: With dead ends: 65586 [2021-11-03 05:47:58,949 INFO L226 Difference]: Without dead ends: 48598 [2021-11-03 05:47:58,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48598 states. [2021-11-03 05:48:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48598 to 48568. [2021-11-03 05:48:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48568 states, 48563 states have (on average 1.8443877025719169) internal successors, (89569), 48567 states have internal predecessors, (89569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48568 states to 48568 states and 89569 transitions. [2021-11-03 05:48:01,036 INFO L78 Accepts]: Start accepts. Automaton has 48568 states and 89569 transitions. Word has length 64 [2021-11-03 05:48:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:01,037 INFO L470 AbstractCegarLoop]: Abstraction has 48568 states and 89569 transitions. [2021-11-03 05:48:01,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 48568 states and 89569 transitions. [2021-11-03 05:48:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 05:48:01,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:01,039 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] [2021-11-03 05:48:01,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:01,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:01,240 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:48:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1627692692, now seen corresponding path program 1 times [2021-11-03 05:48:01,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:01,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533942334] [2021-11-03 05:48:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:01,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:01,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:01,249 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:01,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d26b7979-25e3-44b6-b376-61588b0f8d10/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:48:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:48:01,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:48:02,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:48:02,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:02,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533942334] [2021-11-03 05:48:02,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533942334] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:02,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:02,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:48:02,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984102672] [2021-11-03 05:48:02,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:48:02,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:02,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:48:02,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:02,222 INFO L87 Difference]: Start difference. First operand 48568 states and 89569 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:48:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:07,432 INFO L93 Difference]: Finished difference Result 189147 states and 348704 transitions. [2021-11-03 05:48:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:48:07,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 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 65 [2021-11-03 05:48:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:07,635 INFO L225 Difference]: With dead ends: 189147 [2021-11-03 05:48:07,635 INFO L226 Difference]: Without dead ends: 140753 [2021-11-03 05:48:07,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140753 states.