./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8 --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 bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:24:52,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:24:52,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:24:52,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:24:52,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:24:52,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:24:52,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:24:52,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:24:52,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:24:52,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:24:52,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:24:52,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:24:52,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:24:52,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:24:52,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:24:52,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:24:52,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:24:52,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:24:52,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:24:52,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:24:52,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:24:52,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:24:52,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:24:52,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:24:52,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:24:52,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:24:52,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:24:52,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:24:52,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:24:52,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:24:52,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:24:52,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:24:52,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:24:52,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:24:52,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:24:52,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:24:52,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:24:52,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:24:52,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:24:52,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:24:52,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:24:52,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:24:52,279 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:24:52,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:24:52,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:24:52,280 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:24:52,280 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:24:52,281 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:24:52,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:24:52,281 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:24:52,281 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:24:52,282 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:24:52,282 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:24:52,282 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:24:52,282 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:24:52,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:24:52,283 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:24:52,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:24:52,284 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:24:52,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:24:52,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:24:52,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:24:52,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:24:52,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:24:52,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:24:52,286 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:24:52,286 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:24:52,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:24:52,286 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:24:52,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:24:52,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:24:52,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:24:52,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:24:52,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:24:52,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:24:52,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:24:52,288 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:24:52,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:24:52,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:24:52,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:24:52,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:24:52,289 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_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 [2021-11-07 02:24:52,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:24:52,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:24:52,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:24:52,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:24:52,581 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:24:52,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-07 02:24:52,670 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/data/ac044c7ee/cf9fc668aa2f4c40a4a7395b282dd4ec/FLAG7071be3b1 [2021-11-07 02:24:53,357 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:24:53,363 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-07 02:24:53,407 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/data/ac044c7ee/cf9fc668aa2f4c40a4a7395b282dd4ec/FLAG7071be3b1 [2021-11-07 02:24:53,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/data/ac044c7ee/cf9fc668aa2f4c40a4a7395b282dd4ec [2021-11-07 02:24:53,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:24:53,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:24:53,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:53,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:24:53,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:24:53,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:53" (1/1) ... [2021-11-07 02:24:53,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1038e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:53, skipping insertion in model container [2021-11-07 02:24:53,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:53" (1/1) ... [2021-11-07 02:24:53,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:24:53,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:24:54,418 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_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-07 02:24:54,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:24:54,471 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) [2021-11-07 02:24:54,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@795c9159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:54, skipping insertion in model container [2021-11-07 02:24:54,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:54,472 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:24:54,475 INFO L168 Benchmark]: Toolchain (without parser) took 929.40 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 61.4 MB in the beginning and 89.3 MB in the end (delta: -27.9 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2021-11-07 02:24:54,476 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 104.9 MB. Free memory was 81.2 MB in the beginning and 81.1 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:24:54,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 926.28 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 61.3 MB in the beginning and 89.3 MB in the end (delta: -28.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2021-11-07 02:24:54,480 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 104.9 MB. Free memory was 81.2 MB in the beginning and 81.1 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 926.28 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 61.3 MB in the beginning and 89.3 MB in the end (delta: -28.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3159]: 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_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8 --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 bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:24:57,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:24:57,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:24:57,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:24:57,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:24:57,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:24:57,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:24:57,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:24:57,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:24:57,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:24:57,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:24:57,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:24:57,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:24:57,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:24:57,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:24:57,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:24:57,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:24:57,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:24:57,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:24:57,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:24:57,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:24:57,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:24:57,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:24:57,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:24:57,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:24:57,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:24:57,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:24:57,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:24:57,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:24:57,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:24:57,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:24:57,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:24:57,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:24:57,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:24:57,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:24:57,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:24:57,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:24:57,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:24:57,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:24:57,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:24:57,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:24:57,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:24:57,294 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:24:57,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:24:57,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:24:57,296 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:24:57,296 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:24:57,297 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:24:57,297 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:24:57,297 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:24:57,297 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:24:57,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:24:57,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:24:57,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:24:57,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:24:57,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:24:57,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:24:57,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:24:57,302 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:24:57,303 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:24:57,303 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:24:57,303 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:24:57,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:24:57,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:24:57,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:24:57,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:24:57,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:24:57,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:24:57,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:24:57,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:24:57,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:24:57,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:24:57,306 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:24:57,307 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:57,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:24:57,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:24:57,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:24:57,308 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_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 [2021-11-07 02:24:57,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:24:57,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:24:57,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:24:57,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:24:57,825 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:24:57,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-07 02:24:57,919 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/data/c2c8c7426/843789b0fb71427292ae5236c13f483c/FLAGb20620198 [2021-11-07 02:24:58,825 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:24:58,825 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-07 02:24:58,871 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/data/c2c8c7426/843789b0fb71427292ae5236c13f483c/FLAGb20620198 [2021-11-07 02:24:58,923 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/data/c2c8c7426/843789b0fb71427292ae5236c13f483c [2021-11-07 02:24:58,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:24:58,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:24:58,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:58,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:24:58,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:24:58,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:58" (1/1) ... [2021-11-07 02:24:58,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0eeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:58, skipping insertion in model container [2021-11-07 02:24:58,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:58" (1/1) ... [2021-11-07 02:24:58,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:24:59,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:24:59,811 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_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-07 02:24:59,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:24:59,907 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:24:59,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:25:00,011 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_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-07 02:25:00,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:25:00,041 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:25:00,135 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-07 02:25:00,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:25:00,180 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:25:00,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00 WrapperNode [2021-11-07 02:25:00,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:25:00,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:25:00,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:25:00,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:25:00,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (1/1) ... [2021-11-07 02:25:00,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (1/1) ... [2021-11-07 02:25:00,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:25:00,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:25:00,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:25:00,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:25:00,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (1/1) ... [2021-11-07 02:25:00,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (1/1) ... [2021-11-07 02:25:00,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (1/1) ... [2021-11-07 02:25:00,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (1/1) ... [2021-11-07 02:25:00,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (1/1) ... [2021-11-07 02:25:01,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (1/1) ... [2021-11-07 02:25:01,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (1/1) ... [2021-11-07 02:25:01,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:25:01,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:25:01,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:25:01,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:25:01,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (1/1) ... [2021-11-07 02:25:01,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:25:01,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:25:01,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:25:01,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:25:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:25:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:25:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:25:01,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:25:16,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:25:16,596 INFO L299 CfgBuilder]: Removed 1209 assume(true) statements. [2021-11-07 02:25:16,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:25:16 BoogieIcfgContainer [2021-11-07 02:25:16,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:25:16,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:25:16,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:25:16,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:25:16,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:24:58" (1/3) ... [2021-11-07 02:25:16,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afede6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:25:16, skipping insertion in model container [2021-11-07 02:25:16,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:25:00" (2/3) ... [2021-11-07 02:25:16,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afede6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:25:16, skipping insertion in model container [2021-11-07 02:25:16,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:25:16" (3/3) ... [2021-11-07 02:25:16,618 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product28.cil.c [2021-11-07 02:25:16,624 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:25:16,624 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:25:16,722 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:25:16,733 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 [2021-11-07 02:25:16,733 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:25:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 4983 states, 4977 states have (on average 1.8838657825999598) internal successors, (9376), 4982 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:25:16,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:16,860 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:16,860 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)] === [2021-11-07 02:25:16,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:16,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1433745471, now seen corresponding path program 1 times [2021-11-07 02:25:16,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:16,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185757825] [2021-11-07 02:25:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:16,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:16,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:16,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:16,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:25:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:25:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:17,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:17,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:17,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185757825] [2021-11-07 02:25:17,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185757825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:17,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:17,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:25:17,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866572746] [2021-11-07 02:25:17,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:25:17,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:25:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:25:17,600 INFO L87 Difference]: Start difference. First operand has 4983 states, 4977 states have (on average 1.8838657825999598) internal successors, (9376), 4982 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:17,804 INFO L93 Difference]: Finished difference Result 5002 states and 9399 transitions. [2021-11-07 02:25:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:25:17,806 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:25:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:17,890 INFO L225 Difference]: With dead ends: 5002 [2021-11-07 02:25:17,890 INFO L226 Difference]: Without dead ends: 4979 [2021-11-07 02:25:17,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:25:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2021-11-07 02:25:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 4979. [2021-11-07 02:25:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4979 states, 4974 states have (on average 1.8825894652191395) internal successors, (9364), 4978 states have internal predecessors, (9364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4979 states to 4979 states and 9364 transitions. [2021-11-07 02:25:18,272 INFO L78 Accepts]: Start accepts. Automaton has 4979 states and 9364 transitions. Word has length 36 [2021-11-07 02:25:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:18,273 INFO L470 AbstractCegarLoop]: Abstraction has 4979 states and 9364 transitions. [2021-11-07 02:25:18,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4979 states and 9364 transitions. [2021-11-07 02:25:18,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:25:18,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:18,280 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:18,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:18,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:18,496 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)] === [2021-11-07 02:25:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1211947602, now seen corresponding path program 1 times [2021-11-07 02:25:18,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:18,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217372265] [2021-11-07 02:25:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:18,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:18,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:18,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:25:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:18,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:25:18,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:19,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:19,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:19,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217372265] [2021-11-07 02:25:19,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217372265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:19,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:19,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:25:19,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515437037] [2021-11-07 02:25:19,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:19,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:19,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:19,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:19,203 INFO L87 Difference]: Start difference. First operand 4979 states and 9364 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:19,850 INFO L93 Difference]: Finished difference Result 14857 states and 27949 transitions. [2021-11-07 02:25:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:25:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 02:25:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:19,931 INFO L225 Difference]: With dead ends: 14857 [2021-11-07 02:25:19,931 INFO L226 Difference]: Without dead ends: 9891 [2021-11-07 02:25:19,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9891 states. [2021-11-07 02:25:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9891 to 4979. [2021-11-07 02:25:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4979 states, 4974 states have (on average 1.8811821471652594) internal successors, (9357), 4978 states have internal predecessors, (9357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4979 states to 4979 states and 9357 transitions. [2021-11-07 02:25:20,406 INFO L78 Accepts]: Start accepts. Automaton has 4979 states and 9357 transitions. Word has length 38 [2021-11-07 02:25:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:20,407 INFO L470 AbstractCegarLoop]: Abstraction has 4979 states and 9357 transitions. [2021-11-07 02:25:20,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4979 states and 9357 transitions. [2021-11-07 02:25:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:25:20,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:20,424 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] [2021-11-07 02:25:20,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:20,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:20,641 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)] === [2021-11-07 02:25:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1133130383, now seen corresponding path program 1 times [2021-11-07 02:25:20,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:20,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578495011] [2021-11-07 02:25:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:20,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:20,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:20,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:20,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:25:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:21,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:25:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:21,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:21,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:21,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578495011] [2021-11-07 02:25:21,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578495011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:21,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:21,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:25:21,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114121574] [2021-11-07 02:25:21,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:21,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:21,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:21,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:21,389 INFO L87 Difference]: Start difference. First operand 4979 states and 9357 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) [2021-11-07 02:25:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:23,455 INFO L93 Difference]: Finished difference Result 34328 states and 64551 transitions. [2021-11-07 02:25:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:25:23,456 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 [2021-11-07 02:25:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:23,599 INFO L225 Difference]: With dead ends: 34328 [2021-11-07 02:25:23,600 INFO L226 Difference]: Without dead ends: 29371 [2021-11-07 02:25:23,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:25:23,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29371 states. [2021-11-07 02:25:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29371 to 4957. [2021-11-07 02:25:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4952 states have (on average 1.8792407108239095) internal successors, (9306), 4956 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 9306 transitions. [2021-11-07 02:25:24,224 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 9306 transitions. Word has length 44 [2021-11-07 02:25:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:24,224 INFO L470 AbstractCegarLoop]: Abstraction has 4957 states and 9306 transitions. [2021-11-07 02:25:24,227 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) [2021-11-07 02:25:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 9306 transitions. [2021-11-07 02:25:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:25:24,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:24,229 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:24,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:24,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:24,445 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)] === [2021-11-07 02:25:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:24,446 INFO L85 PathProgramCache]: Analyzing trace with hash 411204656, now seen corresponding path program 1 times [2021-11-07 02:25:24,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:24,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147496864] [2021-11-07 02:25:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:24,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:24,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:24,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:25:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:24,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:25:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:25,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:25,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:25,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147496864] [2021-11-07 02:25:25,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147496864] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:25,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:25,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:25:25,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313502438] [2021-11-07 02:25:25,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:25,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:25,211 INFO L87 Difference]: Start difference. First operand 4957 states and 9306 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:25,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:25,928 INFO L93 Difference]: Finished difference Result 14768 states and 27753 transitions. [2021-11-07 02:25:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:25:25,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:25:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:25,956 INFO L225 Difference]: With dead ends: 14768 [2021-11-07 02:25:25,956 INFO L226 Difference]: Without dead ends: 9833 [2021-11-07 02:25:25,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:25,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2021-11-07 02:25:26,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 4957. [2021-11-07 02:25:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4952 states have (on average 1.8770193861066236) internal successors, (9295), 4956 states have internal predecessors, (9295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 9295 transitions. [2021-11-07 02:25:26,225 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 9295 transitions. Word has length 46 [2021-11-07 02:25:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:26,226 INFO L470 AbstractCegarLoop]: Abstraction has 4957 states and 9295 transitions. [2021-11-07 02:25:26,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 9295 transitions. [2021-11-07 02:25:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:25:26,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:26,228 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] [2021-11-07 02:25:26,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:26,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:26,444 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)] === [2021-11-07 02:25:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1641796805, now seen corresponding path program 1 times [2021-11-07 02:25:26,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:26,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043838206] [2021-11-07 02:25:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:26,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:26,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:26,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:26,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:25:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:25:26,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:27,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:27,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:27,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043838206] [2021-11-07 02:25:27,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043838206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:27,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:27,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:25:27,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25351452] [2021-11-07 02:25:27,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:25:27,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:27,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:25:27,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:25:27,273 INFO L87 Difference]: Start difference. First operand 4957 states and 9295 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:30,868 INFO L93 Difference]: Finished difference Result 53771 states and 101079 transitions. [2021-11-07 02:25:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:25:30,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:25:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:31,025 INFO L225 Difference]: With dead ends: 53771 [2021-11-07 02:25:31,026 INFO L226 Difference]: Without dead ends: 48839 [2021-11-07 02:25:31,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:25:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48839 states. [2021-11-07 02:25:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48839 to 4959. [2021-11-07 02:25:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 4954 states have (on average 1.875656035526847) internal successors, (9292), 4958 states have internal predecessors, (9292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 9292 transitions. [2021-11-07 02:25:31,552 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 9292 transitions. Word has length 52 [2021-11-07 02:25:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:31,553 INFO L470 AbstractCegarLoop]: Abstraction has 4959 states and 9292 transitions. [2021-11-07 02:25:31,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 9292 transitions. [2021-11-07 02:25:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:25:31,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:31,555 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] [2021-11-07 02:25:31,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:31,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:31,775 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)] === [2021-11-07 02:25:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:31,775 INFO L85 PathProgramCache]: Analyzing trace with hash 854430088, now seen corresponding path program 1 times [2021-11-07 02:25:31,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:31,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279149950] [2021-11-07 02:25:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:31,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:31,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:31,780 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:31,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:25:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:32,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:25:32,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:32,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:32,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:32,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279149950] [2021-11-07 02:25:32,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279149950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:32,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:32,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:25:32,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995484418] [2021-11-07 02:25:32,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:25:32,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:25:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:25:32,669 INFO L87 Difference]: Start difference. First operand 4959 states and 9292 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:36,584 INFO L93 Difference]: Finished difference Result 53739 states and 101000 transitions. [2021-11-07 02:25:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:25:36,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:25:36,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:36,721 INFO L225 Difference]: With dead ends: 53739 [2021-11-07 02:25:36,721 INFO L226 Difference]: Without dead ends: 48807 [2021-11-07 02:25:36,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:25:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48807 states. [2021-11-07 02:25:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48807 to 4963. [2021-11-07 02:25:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4963 states, 4958 states have (on average 1.8747478822105688) internal successors, (9295), 4962 states have internal predecessors, (9295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 9295 transitions. [2021-11-07 02:25:37,291 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 9295 transitions. Word has length 54 [2021-11-07 02:25:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:37,291 INFO L470 AbstractCegarLoop]: Abstraction has 4963 states and 9295 transitions. [2021-11-07 02:25:37,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 9295 transitions. [2021-11-07 02:25:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:25:37,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:37,293 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] [2021-11-07 02:25:37,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:37,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:37,511 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)] === [2021-11-07 02:25:37,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:37,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2029004475, now seen corresponding path program 1 times [2021-11-07 02:25:37,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:37,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185262388] [2021-11-07 02:25:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:37,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:37,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:37,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:37,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:25:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:25:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:38,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:38,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:38,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185262388] [2021-11-07 02:25:38,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185262388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:38,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:38,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:25:38,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418040377] [2021-11-07 02:25:38,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:38,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:38,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:38,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:38,443 INFO L87 Difference]: Start difference. First operand 4963 states and 9295 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:38,671 INFO L93 Difference]: Finished difference Result 9874 states and 18521 transitions. [2021-11-07 02:25:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:25:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:25:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:38,686 INFO L225 Difference]: With dead ends: 9874 [2021-11-07 02:25:38,686 INFO L226 Difference]: Without dead ends: 4942 [2021-11-07 02:25:38,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-11-07 02:25:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4942. [2021-11-07 02:25:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4942 states, 4937 states have (on average 1.8750253190196475) internal successors, (9257), 4941 states have internal predecessors, (9257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:39,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4942 states to 4942 states and 9257 transitions. [2021-11-07 02:25:39,011 INFO L78 Accepts]: Start accepts. Automaton has 4942 states and 9257 transitions. Word has length 56 [2021-11-07 02:25:39,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:39,012 INFO L470 AbstractCegarLoop]: Abstraction has 4942 states and 9257 transitions. [2021-11-07 02:25:39,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:39,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4942 states and 9257 transitions. [2021-11-07 02:25:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:25:39,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:39,014 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:39,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:39,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:39,231 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)] === [2021-11-07 02:25:39,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:39,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1523002525, now seen corresponding path program 1 times [2021-11-07 02:25:39,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:39,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533603529] [2021-11-07 02:25:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:39,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:39,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:39,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:39,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:25:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:39,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:25:39,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:39,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:39,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:39,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533603529] [2021-11-07 02:25:39,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533603529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:39,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:39,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:25:39,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681918355] [2021-11-07 02:25:39,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:39,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:39,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:39,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:39,996 INFO L87 Difference]: Start difference. First operand 4942 states and 9257 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:40,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:40,356 INFO L93 Difference]: Finished difference Result 9818 states and 18424 transitions. [2021-11-07 02:25:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:25:40,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 02:25:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:40,366 INFO L225 Difference]: With dead ends: 9818 [2021-11-07 02:25:40,367 INFO L226 Difference]: Without dead ends: 4917 [2021-11-07 02:25:40,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:25:40,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4917 states. [2021-11-07 02:25:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4917 to 4917. [2021-11-07 02:25:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4917 states, 4912 states have (on average 1.8756107491856677) internal successors, (9213), 4916 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4917 states to 4917 states and 9213 transitions. [2021-11-07 02:25:40,820 INFO L78 Accepts]: Start accepts. Automaton has 4917 states and 9213 transitions. Word has length 57 [2021-11-07 02:25:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:40,821 INFO L470 AbstractCegarLoop]: Abstraction has 4917 states and 9213 transitions. [2021-11-07 02:25:40,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 4917 states and 9213 transitions. [2021-11-07 02:25:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:25:40,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:40,822 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:40,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:41,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:41,037 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)] === [2021-11-07 02:25:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:41,037 INFO L85 PathProgramCache]: Analyzing trace with hash 79844012, now seen corresponding path program 1 times [2021-11-07 02:25:41,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:41,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632019257] [2021-11-07 02:25:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:41,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:41,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:41,038 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:41,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:25:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:25:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:41,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:41,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:41,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632019257] [2021-11-07 02:25:41,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632019257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:41,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:41,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:25:41,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830111737] [2021-11-07 02:25:41,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:41,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:41,687 INFO L87 Difference]: Start difference. First operand 4917 states and 9213 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:41,920 INFO L93 Difference]: Finished difference Result 9793 states and 18380 transitions. [2021-11-07 02:25:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:25:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:25:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:41,928 INFO L225 Difference]: With dead ends: 9793 [2021-11-07 02:25:41,929 INFO L226 Difference]: Without dead ends: 4914 [2021-11-07 02:25:41,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4914 states. [2021-11-07 02:25:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4914 to 4914. [2021-11-07 02:25:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4914 states, 4909 states have (on average 1.8751273171725402) internal successors, (9205), 4913 states have internal predecessors, (9205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4914 states to 4914 states and 9205 transitions. [2021-11-07 02:25:42,214 INFO L78 Accepts]: Start accepts. Automaton has 4914 states and 9205 transitions. Word has length 58 [2021-11-07 02:25:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:42,214 INFO L470 AbstractCegarLoop]: Abstraction has 4914 states and 9205 transitions. [2021-11-07 02:25:42,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 4914 states and 9205 transitions. [2021-11-07 02:25:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:25:42,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:42,216 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:42,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:42,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:42,432 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)] === [2021-11-07 02:25:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1399220067, now seen corresponding path program 1 times [2021-11-07 02:25:42,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:42,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047023668] [2021-11-07 02:25:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:42,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:42,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:42,434 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:42,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:25:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:42,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:25:42,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:43,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:43,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:43,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047023668] [2021-11-07 02:25:43,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047023668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:43,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:43,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:25:43,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866624273] [2021-11-07 02:25:43,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:25:43,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:43,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:25:43,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:25:43,199 INFO L87 Difference]: Start difference. First operand 4914 states and 9205 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:43,592 INFO L93 Difference]: Finished difference Result 9784 states and 18362 transitions. [2021-11-07 02:25:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 02:25:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:43,599 INFO L225 Difference]: With dead ends: 9784 [2021-11-07 02:25:43,599 INFO L226 Difference]: Without dead ends: 4912 [2021-11-07 02:25:43,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:25:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4912 states. [2021-11-07 02:25:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4912 to 4912. [2021-11-07 02:25:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4907 states have (on average 1.874668840432036) internal successors, (9199), 4911 states have internal predecessors, (9199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 9199 transitions. [2021-11-07 02:25:43,898 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 9199 transitions. Word has length 59 [2021-11-07 02:25:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:43,898 INFO L470 AbstractCegarLoop]: Abstraction has 4912 states and 9199 transitions. [2021-11-07 02:25:43,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 9199 transitions. [2021-11-07 02:25:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:25:43,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:43,900 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:43,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:44,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:44,103 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)] === [2021-11-07 02:25:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:44,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1713616687, now seen corresponding path program 1 times [2021-11-07 02:25:44,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:44,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151405444] [2021-11-07 02:25:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:44,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:44,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:44,105 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:44,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:25:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:44,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:25:44,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:44,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:45,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:45,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151405444] [2021-11-07 02:25:45,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151405444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:45,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:45,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:25:45,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503831328] [2021-11-07 02:25:45,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:25:45,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:45,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:25:45,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:25:45,021 INFO L87 Difference]: Start difference. First operand 4912 states and 9199 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:45,438 INFO L93 Difference]: Finished difference Result 9777 states and 18347 transitions. [2021-11-07 02:25:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:45,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:25:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:45,446 INFO L225 Difference]: With dead ends: 9777 [2021-11-07 02:25:45,447 INFO L226 Difference]: Without dead ends: 4910 [2021-11-07 02:25:45,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:25:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2021-11-07 02:25:45,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 4910. [2021-11-07 02:25:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 4905 states have (on average 1.87420998980632) internal successors, (9193), 4909 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 9193 transitions. [2021-11-07 02:25:45,745 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 9193 transitions. Word has length 60 [2021-11-07 02:25:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:45,745 INFO L470 AbstractCegarLoop]: Abstraction has 4910 states and 9193 transitions. [2021-11-07 02:25:45,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 9193 transitions. [2021-11-07 02:25:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:25:45,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:45,747 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:45,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:45,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:45,949 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)] === [2021-11-07 02:25:45,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:45,952 INFO L85 PathProgramCache]: Analyzing trace with hash 863761490, now seen corresponding path program 1 times [2021-11-07 02:25:45,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:45,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955913401] [2021-11-07 02:25:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:45,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:45,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:45,954 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:46,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:25:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:46,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:25:46,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:47,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:47,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:47,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955913401] [2021-11-07 02:25:47,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955913401] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:47,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:47,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:25:47,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109743923] [2021-11-07 02:25:47,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:47,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:47,313 INFO L87 Difference]: Start difference. First operand 4910 states and 9193 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:48,107 INFO L93 Difference]: Finished difference Result 13324 states and 25050 transitions. [2021-11-07 02:25:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:25:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 02:25:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:48,120 INFO L225 Difference]: With dead ends: 13324 [2021-11-07 02:25:48,120 INFO L226 Difference]: Without dead ends: 10837 [2021-11-07 02:25:48,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10837 states. [2021-11-07 02:25:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 6516. [2021-11-07 02:25:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6516 states, 6511 states have (on average 1.87774535401628) internal successors, (12226), 6515 states have internal predecessors, (12226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6516 states to 6516 states and 12226 transitions. [2021-11-07 02:25:48,521 INFO L78 Accepts]: Start accepts. Automaton has 6516 states and 12226 transitions. Word has length 61 [2021-11-07 02:25:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:48,522 INFO L470 AbstractCegarLoop]: Abstraction has 6516 states and 12226 transitions. [2021-11-07 02:25:48,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 6516 states and 12226 transitions. [2021-11-07 02:25:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:25:48,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:48,533 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:48,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:48,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:48,734 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)] === [2021-11-07 02:25:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1295338191, now seen corresponding path program 1 times [2021-11-07 02:25:48,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:48,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389663227] [2021-11-07 02:25:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:48,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:48,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:48,737 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:48,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:25:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:49,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:25:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:49,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:49,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:49,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389663227] [2021-11-07 02:25:49,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389663227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:49,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:49,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:25:49,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211422465] [2021-11-07 02:25:49,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:25:49,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:25:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:25:49,820 INFO L87 Difference]: Start difference. First operand 6516 states and 12226 transitions. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:50,575 INFO L93 Difference]: Finished difference Result 12402 states and 23078 transitions. [2021-11-07 02:25:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:25:50,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 02:25:50,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:50,586 INFO L225 Difference]: With dead ends: 12402 [2021-11-07 02:25:50,587 INFO L226 Difference]: Without dead ends: 7121 [2021-11-07 02:25:50,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:25:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7121 states. [2021-11-07 02:25:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7121 to 4835. [2021-11-07 02:25:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4830 states have (on average 1.8691511387163562) internal successors, (9028), 4834 states have internal predecessors, (9028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 9028 transitions. [2021-11-07 02:25:50,942 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 9028 transitions. Word has length 80 [2021-11-07 02:25:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:50,943 INFO L470 AbstractCegarLoop]: Abstraction has 4835 states and 9028 transitions. [2021-11-07 02:25:50,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 9028 transitions. [2021-11-07 02:25:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:25:50,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:50,947 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:50,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:51,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:51,164 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)] === [2021-11-07 02:25:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash -361502351, now seen corresponding path program 1 times [2021-11-07 02:25:51,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:51,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909010442] [2021-11-07 02:25:51,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:51,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:51,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:51,166 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:51,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:25:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:25:51,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:52,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:52,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:52,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909010442] [2021-11-07 02:25:52,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909010442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:52,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:52,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:25:52,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362803880] [2021-11-07 02:25:52,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:52,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:52,423 INFO L87 Difference]: Start difference. First operand 4835 states and 9028 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:54,997 INFO L93 Difference]: Finished difference Result 17909 states and 33544 transitions. [2021-11-07 02:25:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:54,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 02:25:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:55,018 INFO L225 Difference]: With dead ends: 17909 [2021-11-07 02:25:55,018 INFO L226 Difference]: Without dead ends: 13128 [2021-11-07 02:25:55,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:25:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13128 states. [2021-11-07 02:25:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13128 to 4835. [2021-11-07 02:25:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4830 states have (on average 1.8339544513457557) internal successors, (8858), 4834 states have internal predecessors, (8858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:55,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 8858 transitions. [2021-11-07 02:25:55,421 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 8858 transitions. Word has length 81 [2021-11-07 02:25:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:55,421 INFO L470 AbstractCegarLoop]: Abstraction has 4835 states and 8858 transitions. [2021-11-07 02:25:55,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 8858 transitions. [2021-11-07 02:25:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:25:55,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:55,424 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:55,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 02:25:55,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:55,625 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)] === [2021-11-07 02:25:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:55,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2110242851, now seen corresponding path program 1 times [2021-11-07 02:25:55,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:55,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422334168] [2021-11-07 02:25:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:55,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:55,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:55,627 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:55,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:25:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:25:56,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:56,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:56,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:56,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422334168] [2021-11-07 02:25:56,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422334168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:56,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:56,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:25:56,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753715977] [2021-11-07 02:25:56,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:56,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:56,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:56,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:56,870 INFO L87 Difference]: Start difference. First operand 4835 states and 8858 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:58,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:58,474 INFO L93 Difference]: Finished difference Result 13686 states and 25293 transitions. [2021-11-07 02:25:58,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:25:58,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 02:25:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:58,484 INFO L225 Difference]: With dead ends: 13686 [2021-11-07 02:25:58,484 INFO L226 Difference]: Without dead ends: 8923 [2021-11-07 02:25:58,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:25:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8923 states. [2021-11-07 02:25:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8923 to 4767. [2021-11-07 02:25:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4767 states, 4762 states have (on average 1.8341033179336412) internal successors, (8734), 4766 states have internal predecessors, (8734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4767 states to 4767 states and 8734 transitions. [2021-11-07 02:25:58,759 INFO L78 Accepts]: Start accepts. Automaton has 4767 states and 8734 transitions. Word has length 89 [2021-11-07 02:25:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:58,760 INFO L470 AbstractCegarLoop]: Abstraction has 4767 states and 8734 transitions. [2021-11-07 02:25:58,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4767 states and 8734 transitions. [2021-11-07 02:25:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:25:58,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:58,763 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:58,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:58,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:58,987 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)] === [2021-11-07 02:25:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:58,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1010708291, now seen corresponding path program 1 times [2021-11-07 02:25:58,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:58,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698492813] [2021-11-07 02:25:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:58,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:58,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:58,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:58,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:25:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:59,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:25:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:59,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:00,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:00,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698492813] [2021-11-07 02:26:00,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698492813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:00,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:00,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:26:00,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864607222] [2021-11-07 02:26:00,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:26:00,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:26:00,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:26:00,223 INFO L87 Difference]: Start difference. First operand 4767 states and 8734 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:02,886 INFO L93 Difference]: Finished difference Result 18870 states and 34786 transitions. [2021-11-07 02:26:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:26:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:26:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:02,907 INFO L225 Difference]: With dead ends: 18870 [2021-11-07 02:26:02,907 INFO L226 Difference]: Without dead ends: 14174 [2021-11-07 02:26:02,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:26:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14174 states. [2021-11-07 02:26:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14174 to 4775. [2021-11-07 02:26:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4775 states, 4770 states have (on average 1.8327044025157233) internal successors, (8742), 4774 states have internal predecessors, (8742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 8742 transitions. [2021-11-07 02:26:03,289 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 8742 transitions. Word has length 91 [2021-11-07 02:26:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:03,289 INFO L470 AbstractCegarLoop]: Abstraction has 4775 states and 8742 transitions. [2021-11-07 02:26:03,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 8742 transitions. [2021-11-07 02:26:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 02:26:03,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:03,292 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:03,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:03,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:03,510 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:26:03,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:03,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1259983970, now seen corresponding path program 1 times [2021-11-07 02:26:03,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:03,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609189200] [2021-11-07 02:26:03,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:03,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:03,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:03,512 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:03,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:26:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:04,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:26:04,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:04,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:04,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:04,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609189200] [2021-11-07 02:26:04,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609189200] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:04,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:04,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:26:04,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448050526] [2021-11-07 02:26:04,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:26:04,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:04,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:26:04,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:26:04,767 INFO L87 Difference]: Start difference. First operand 4775 states and 8742 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:12,150 INFO L93 Difference]: Finished difference Result 12508 states and 22887 transitions. [2021-11-07 02:26:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:26:12,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 02:26:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:12,167 INFO L225 Difference]: With dead ends: 12508 [2021-11-07 02:26:12,167 INFO L226 Difference]: Without dead ends: 9133 [2021-11-07 02:26:12,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:26:12,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9133 states. [2021-11-07 02:26:12,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9133 to 8941. [2021-11-07 02:26:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8941 states, 8936 states have (on average 1.83952551477171) internal successors, (16438), 8940 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8941 states to 8941 states and 16438 transitions. [2021-11-07 02:26:12,804 INFO L78 Accepts]: Start accepts. Automaton has 8941 states and 16438 transitions. Word has length 92 [2021-11-07 02:26:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:12,804 INFO L470 AbstractCegarLoop]: Abstraction has 8941 states and 16438 transitions. [2021-11-07 02:26:12,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8941 states and 16438 transitions. [2021-11-07 02:26:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 02:26:12,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:12,810 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:12,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:13,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:13,023 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:26:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:13,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2023866076, now seen corresponding path program 1 times [2021-11-07 02:26:13,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:13,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458164820] [2021-11-07 02:26:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:13,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:13,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:13,025 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:13,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:26:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:13,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:26:13,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:14,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:14,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:14,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458164820] [2021-11-07 02:26:14,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458164820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:14,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:14,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:26:14,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468594225] [2021-11-07 02:26:14,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:26:14,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:14,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:26:14,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:26:14,439 INFO L87 Difference]: Start difference. First operand 8941 states and 16438 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:17,101 INFO L93 Difference]: Finished difference Result 16869 states and 30923 transitions. [2021-11-07 02:26:17,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:26:17,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 02:26:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:17,115 INFO L225 Difference]: With dead ends: 16869 [2021-11-07 02:26:17,115 INFO L226 Difference]: Without dead ends: 9331 [2021-11-07 02:26:17,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:26:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9331 states. [2021-11-07 02:26:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9331 to 8876. [2021-11-07 02:26:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8876 states, 8871 states have (on average 1.8282042610754143) internal successors, (16218), 8875 states have internal predecessors, (16218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8876 states to 8876 states and 16218 transitions. [2021-11-07 02:26:17,702 INFO L78 Accepts]: Start accepts. Automaton has 8876 states and 16218 transitions. Word has length 92 [2021-11-07 02:26:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:17,702 INFO L470 AbstractCegarLoop]: Abstraction has 8876 states and 16218 transitions. [2021-11-07 02:26:17,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 8876 states and 16218 transitions. [2021-11-07 02:26:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 02:26:17,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:17,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:17,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:17,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:17,919 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:26:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash -855404444, now seen corresponding path program 1 times [2021-11-07 02:26:17,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:17,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919005506] [2021-11-07 02:26:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:17,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:17,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:17,921 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:17,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:26:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:18,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:26:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:19,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:19,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:19,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919005506] [2021-11-07 02:26:19,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919005506] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:19,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:19,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:26:19,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613642830] [2021-11-07 02:26:19,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:26:19,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:26:19,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:26:19,371 INFO L87 Difference]: Start difference. First operand 8876 states and 16218 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:20,985 INFO L93 Difference]: Finished difference Result 18270 states and 33375 transitions. [2021-11-07 02:26:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:26:20,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 02:26:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:21,004 INFO L225 Difference]: With dead ends: 18270 [2021-11-07 02:26:21,004 INFO L226 Difference]: Without dead ends: 12088 [2021-11-07 02:26:21,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:26:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12088 states. [2021-11-07 02:26:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12088 to 8863. [2021-11-07 02:26:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8858 states have (on average 1.8279521336644842) internal successors, (16192), 8862 states have internal predecessors, (16192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 16192 transitions. [2021-11-07 02:26:21,621 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 16192 transitions. Word has length 94 [2021-11-07 02:26:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:21,621 INFO L470 AbstractCegarLoop]: Abstraction has 8863 states and 16192 transitions. [2021-11-07 02:26:21,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 16192 transitions. [2021-11-07 02:26:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 02:26:21,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:21,625 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:21,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 02:26:21,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:21,839 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:26:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:21,839 INFO L85 PathProgramCache]: Analyzing trace with hash -328538838, now seen corresponding path program 1 times [2021-11-07 02:26:21,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:21,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610969544] [2021-11-07 02:26:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:21,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:21,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:21,841 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:21,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:26:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:22,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:26:22,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:23,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:23,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:23,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610969544] [2021-11-07 02:26:23,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610969544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:23,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:23,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:26:23,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682021601] [2021-11-07 02:26:23,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:26:23,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:26:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:26:23,394 INFO L87 Difference]: Start difference. First operand 8863 states and 16192 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:26,008 INFO L93 Difference]: Finished difference Result 41497 states and 76510 transitions. [2021-11-07 02:26:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:26:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 02:26:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:26,067 INFO L225 Difference]: With dead ends: 41497 [2021-11-07 02:26:26,067 INFO L226 Difference]: Without dead ends: 35325 [2021-11-07 02:26:26,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:26:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35325 states. [2021-11-07 02:26:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35325 to 14691. [2021-11-07 02:26:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14691 states, 14686 states have (on average 1.8309955059240093) internal successors, (26890), 14690 states have internal predecessors, (26890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14691 states to 14691 states and 26890 transitions. [2021-11-07 02:26:27,205 INFO L78 Accepts]: Start accepts. Automaton has 14691 states and 26890 transitions. Word has length 96 [2021-11-07 02:26:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:27,205 INFO L470 AbstractCegarLoop]: Abstraction has 14691 states and 26890 transitions. [2021-11-07 02:26:27,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 14691 states and 26890 transitions. [2021-11-07 02:26:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 02:26:27,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:27,209 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:27,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:27,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:27,417 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:26:27,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:27,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1862369278, now seen corresponding path program 1 times [2021-11-07 02:26:27,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:27,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107984348] [2021-11-07 02:26:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:27,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:27,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:27,420 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:27,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:26:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:28,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:26:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:28,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:28,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:28,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107984348] [2021-11-07 02:26:28,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107984348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:28,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:28,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:26:28,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459299125] [2021-11-07 02:26:28,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:26:28,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:28,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:26:28,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:26:28,973 INFO L87 Difference]: Start difference. First operand 14691 states and 26890 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:36,244 INFO L93 Difference]: Finished difference Result 90619 states and 167192 transitions. [2021-11-07 02:26:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:26:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 02:26:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:36,361 INFO L225 Difference]: With dead ends: 90619 [2021-11-07 02:26:36,361 INFO L226 Difference]: Without dead ends: 78619 [2021-11-07 02:26:36,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:26:36,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78619 states. [2021-11-07 02:26:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78619 to 25208. [2021-11-07 02:26:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25208 states, 25203 states have (on average 1.8395032337420147) internal successors, (46361), 25207 states have internal predecessors, (46361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25208 states to 25208 states and 46361 transitions. [2021-11-07 02:26:38,609 INFO L78 Accepts]: Start accepts. Automaton has 25208 states and 46361 transitions. Word has length 98 [2021-11-07 02:26:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:38,610 INFO L470 AbstractCegarLoop]: Abstraction has 25208 states and 46361 transitions. [2021-11-07 02:26:38,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 25208 states and 46361 transitions. [2021-11-07 02:26:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 02:26:38,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:38,612 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:38,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:38,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:38,813 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:26:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:38,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1839559937, now seen corresponding path program 1 times [2021-11-07 02:26:38,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:38,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59902956] [2021-11-07 02:26:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:38,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:38,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:38,817 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:38,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:26:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:39,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:26:39,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:40,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:40,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:40,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59902956] [2021-11-07 02:26:40,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59902956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:40,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:40,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:26:40,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483567944] [2021-11-07 02:26:40,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:26:40,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:40,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:26:40,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:26:40,393 INFO L87 Difference]: Start difference. First operand 25208 states and 46361 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:42,468 INFO L93 Difference]: Finished difference Result 47818 states and 87922 transitions. [2021-11-07 02:26:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:26:42,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-07 02:26:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:42,511 INFO L225 Difference]: With dead ends: 47818 [2021-11-07 02:26:42,511 INFO L226 Difference]: Without dead ends: 25223 [2021-11-07 02:26:42,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:26:42,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25223 states. [2021-11-07 02:26:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25223 to 25208. [2021-11-07 02:26:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25208 states, 25203 states have (on average 1.834186406380193) internal successors, (46227), 25207 states have internal predecessors, (46227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25208 states to 25208 states and 46227 transitions. [2021-11-07 02:26:44,621 INFO L78 Accepts]: Start accepts. Automaton has 25208 states and 46227 transitions. Word has length 105 [2021-11-07 02:26:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:44,621 INFO L470 AbstractCegarLoop]: Abstraction has 25208 states and 46227 transitions. [2021-11-07 02:26:44,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 25208 states and 46227 transitions. [2021-11-07 02:26:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 02:26:44,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:44,624 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:44,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:44,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:44,825 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:26:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash 305566211, now seen corresponding path program 1 times [2021-11-07 02:26:44,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:44,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640020493] [2021-11-07 02:26:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:44,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:44,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:44,827 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:44,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:26:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:45,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:26:45,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:46,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:46,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:46,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640020493] [2021-11-07 02:26:46,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640020493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:46,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:46,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:26:46,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518655012] [2021-11-07 02:26:46,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:26:46,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:26:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:26:46,727 INFO L87 Difference]: Start difference. First operand 25208 states and 46227 transitions. Second operand has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:53,533 INFO L93 Difference]: Finished difference Result 76362 states and 140034 transitions. [2021-11-07 02:26:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:26:53,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 02:26:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:53,617 INFO L225 Difference]: With dead ends: 76362 [2021-11-07 02:26:53,617 INFO L226 Difference]: Without dead ends: 53998 [2021-11-07 02:26:53,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:26:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53998 states. [2021-11-07 02:26:56,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53998 to 20351. [2021-11-07 02:26:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20351 states, 20346 states have (on average 1.8254202300206428) internal successors, (37140), 20350 states have internal predecessors, (37140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20351 states to 20351 states and 37140 transitions. [2021-11-07 02:26:56,067 INFO L78 Accepts]: Start accepts. Automaton has 20351 states and 37140 transitions. Word has length 106 [2021-11-07 02:26:56,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:56,078 INFO L470 AbstractCegarLoop]: Abstraction has 20351 states and 37140 transitions. [2021-11-07 02:26:56,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 20351 states and 37140 transitions. [2021-11-07 02:26:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 02:26:56,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:56,083 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:56,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:56,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:56,303 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:26:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:56,304 INFO L85 PathProgramCache]: Analyzing trace with hash -118745025, now seen corresponding path program 1 times [2021-11-07 02:26:56,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:56,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005057696] [2021-11-07 02:26:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:56,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:56,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:56,305 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:56,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4bf71d-068f-40a1-ab45-bbbb0cc0e86d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:26:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:57,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:26:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:57,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:58,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:58,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005057696] [2021-11-07 02:26:58,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005057696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:58,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:58,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:26:58,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22098922] [2021-11-07 02:26:58,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:26:58,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:58,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:26:58,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:26:58,354 INFO L87 Difference]: Start difference. First operand 20351 states and 37140 transitions. Second operand has 10 states, 10 states have (on average 20.3) internal successors, (203), 9 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:27:18,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:27:18,655 INFO L93 Difference]: Finished difference Result 144400 states and 262804 transitions. [2021-11-07 02:27:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 02:27:18,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 9 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 02:27:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:27:18,897 INFO L225 Difference]: With dead ends: 144400 [2021-11-07 02:27:18,897 INFO L226 Difference]: Without dead ends: 125399 [2021-11-07 02:27:18,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:27:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125399 states.