./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:40:10,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:40:10,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:40:10,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:40:10,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:40:10,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:40:10,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:40:10,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:40:10,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:40:10,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:40:10,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:40:10,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:40:10,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:40:10,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:40:10,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:40:10,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:40:10,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:40:10,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:40:10,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:40:10,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:40:10,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:40:10,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:40:10,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:40:10,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:40:10,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:40:10,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:40:10,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:40:10,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:40:10,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:40:10,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:40:10,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:40:10,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:40:10,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:40:10,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:40:10,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:40:10,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:40:10,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:40:10,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:40:10,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:40:10,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:40:10,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:40:10,425 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:40:10,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:40:10,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:40:10,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:40:10,473 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:40:10,473 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:40:10,473 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:40:10,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:40:10,474 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:40:10,480 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:40:10,481 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:40:10,482 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:40:10,482 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:40:10,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:40:10,483 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:40:10,483 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:40:10,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:40:10,484 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:40:10,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:40:10,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:40:10,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:40:10,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:40:10,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:40:10,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:40:10,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:40:10,486 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:40:10,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:40:10,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:40:10,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:40:10,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:40:10,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:40:10,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:40:10,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:40:10,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:40:10,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:40:10,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:40:10,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:40:10,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:40:10,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:40:10,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:40:10,491 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_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2021-11-03 03:40:10,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:40:10,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:40:10,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:40:10,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:40:10,817 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:40:10,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-03 03:40:10,908 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/data/31f930b30/0480f387ff0c425d9ab451bb48caca3d/FLAG123f52ee2 [2021-11-03 03:40:11,625 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:40:11,626 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-03 03:40:11,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/data/31f930b30/0480f387ff0c425d9ab451bb48caca3d/FLAG123f52ee2 [2021-11-03 03:40:11,800 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/data/31f930b30/0480f387ff0c425d9ab451bb48caca3d [2021-11-03 03:40:11,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:40:11,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:40:11,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:11,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:40:11,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:40:11,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:11" (1/1) ... [2021-11-03 03:40:11,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157548a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:11, skipping insertion in model container [2021-11-03 03:40:11,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:11" (1/1) ... [2021-11-03 03:40:11,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:40:11,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:40:12,407 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_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-03 03:40:12,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:12,598 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 03:40:12,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@218e90dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:12, skipping insertion in model container [2021-11-03 03:40:12,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:12,602 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:40:12,618 INFO L168 Benchmark]: Toolchain (without parser) took 798.72 ms. Allocated memory is still 138.4 MB. Free memory was 102.2 MB in the beginning and 100.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 03:40:12,619 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory is still 48.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:40:12,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 794.25 ms. Allocated memory is still 138.4 MB. Free memory was 101.9 MB in the beginning and 100.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 03:40:12,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory is still 48.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 794.25 ms. Allocated memory is still 138.4 MB. Free memory was 101.9 MB in the beginning and 100.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2888]: 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_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:40:15,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:40:15,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:40:15,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:40:15,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:40:15,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:40:15,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:40:15,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:40:15,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:40:15,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:40:15,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:40:15,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:40:15,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:40:15,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:40:15,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:40:15,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:40:15,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:40:15,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:40:15,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:40:15,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:40:15,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:40:15,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:40:15,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:40:15,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:40:15,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:40:15,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:40:15,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:40:15,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:40:15,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:40:15,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:40:15,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:40:15,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:40:15,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:40:15,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:40:15,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:40:15,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:40:15,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:40:15,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:40:15,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:40:15,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:40:15,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:40:15,174 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 03:40:15,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:40:15,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:40:15,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:40:15,223 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:40:15,223 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:40:15,223 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:40:15,224 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:40:15,224 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:40:15,224 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:40:15,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:40:15,227 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:40:15,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:40:15,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:40:15,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:40:15,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:40:15,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:40:15,228 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:40:15,228 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:40:15,229 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:40:15,229 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:40:15,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:40:15,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:40:15,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:40:15,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:40:15,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:40:15,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:40:15,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:40:15,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:40:15,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:40:15,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:40:15,232 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:40:15,232 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:40:15,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:40:15,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:40:15,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:40:15,233 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_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2021-11-03 03:40:15,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:40:15,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:40:15,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:40:15,707 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:40:15,708 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:40:15,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-03 03:40:15,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/data/daac549ac/e1f95a8e7bcf4ea69a5c8d4a8e370bc9/FLAG5040f3653 [2021-11-03 03:40:16,628 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:40:16,629 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-03 03:40:16,667 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/data/daac549ac/e1f95a8e7bcf4ea69a5c8d4a8e370bc9/FLAG5040f3653 [2021-11-03 03:40:16,686 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/data/daac549ac/e1f95a8e7bcf4ea69a5c8d4a8e370bc9 [2021-11-03 03:40:16,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:40:16,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:40:16,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:16,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:40:16,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:40:16,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:16" (1/1) ... [2021-11-03 03:40:16,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd43eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:16, skipping insertion in model container [2021-11-03 03:40:16,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:16" (1/1) ... [2021-11-03 03:40:16,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:40:16,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:40:17,357 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_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-03 03:40:17,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:17,480 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:40:17,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:40:17,591 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_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-03 03:40:17,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:17,692 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:40:17,763 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_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-03 03:40:17,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:40:17,868 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:40:17,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17 WrapperNode [2021-11-03 03:40:17,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:40:17,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:40:17,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:40:17,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:40:17,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (1/1) ... [2021-11-03 03:40:17,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (1/1) ... [2021-11-03 03:40:18,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:40:18,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:40:18,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:40:18,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:40:18,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (1/1) ... [2021-11-03 03:40:18,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (1/1) ... [2021-11-03 03:40:18,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (1/1) ... [2021-11-03 03:40:18,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (1/1) ... [2021-11-03 03:40:18,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (1/1) ... [2021-11-03 03:40:18,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (1/1) ... [2021-11-03 03:40:18,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (1/1) ... [2021-11-03 03:40:18,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:40:18,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:40:18,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:40:18,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:40:18,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (1/1) ... [2021-11-03 03:40:18,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:40:18,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:40:18,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:40:18,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:40:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:40:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:40:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:40:19,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:40:33,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:40:33,004 INFO L299 CfgBuilder]: Removed 1245 assume(true) statements. [2021-11-03 03:40:33,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:33 BoogieIcfgContainer [2021-11-03 03:40:33,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:40:33,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:40:33,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:40:33,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:40:33,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:40:16" (1/3) ... [2021-11-03 03:40:33,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec40d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:40:33, skipping insertion in model container [2021-11-03 03:40:33,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:17" (2/3) ... [2021-11-03 03:40:33,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec40d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:40:33, skipping insertion in model container [2021-11-03 03:40:33,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:33" (3/3) ... [2021-11-03 03:40:33,023 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product28.cil.c [2021-11-03 03:40:33,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:40:33,028 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 03:40:33,119 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:40:33,127 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 03:40:33,128 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 03:40:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 5044 states, 5038 states have (on average 1.8858674077014688) internal successors, (9501), 5043 states have internal predecessors, (9501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:40:33,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:33,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:33,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:33,273 INFO L85 PathProgramCache]: Analyzing trace with hash -424075637, now seen corresponding path program 1 times [2021-11-03 03:40:33,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:33,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512493012] [2021-11-03 03:40:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:33,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:33,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:33,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:33,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:40:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 03:40:33,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:33,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:33,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:33,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512493012] [2021-11-03 03:40:33,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512493012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:33,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:33,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:40:33,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090341033] [2021-11-03 03:40:33,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 03:40:33,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:33,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 03:40:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:40:33,856 INFO L87 Difference]: Start difference. First operand has 5044 states, 5038 states have (on average 1.8858674077014688) internal successors, (9501), 5043 states have internal predecessors, (9501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:34,001 INFO L93 Difference]: Finished difference Result 5063 states and 9524 transitions. [2021-11-03 03:40:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:40:34,003 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 03:40:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:34,051 INFO L225 Difference]: With dead ends: 5063 [2021-11-03 03:40:34,052 INFO L226 Difference]: Without dead ends: 5040 [2021-11-03 03:40:34,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:40:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2021-11-03 03:40:34,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 5040. [2021-11-03 03:40:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5040 states, 5035 states have (on average 1.8846077457795432) internal successors, (9489), 5039 states have internal predecessors, (9489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 9489 transitions. [2021-11-03 03:40:34,373 INFO L78 Accepts]: Start accepts. Automaton has 5040 states and 9489 transitions. Word has length 27 [2021-11-03 03:40:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:34,373 INFO L470 AbstractCegarLoop]: Abstraction has 5040 states and 9489 transitions. [2021-11-03 03:40:34,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 5040 states and 9489 transitions. [2021-11-03 03:40:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-03 03:40:34,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:34,383 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:34,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:34,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:34,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:34,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:34,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1910901455, now seen corresponding path program 1 times [2021-11-03 03:40:34,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:34,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96080982] [2021-11-03 03:40:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:34,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:34,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:34,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:34,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:40:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:34,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:40:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:35,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:35,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:35,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96080982] [2021-11-03 03:40:35,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96080982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:35,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:35,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:40:35,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876782996] [2021-11-03 03:40:35,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:35,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:35,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:35,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:35,166 INFO L87 Difference]: Start difference. First operand 5040 states and 9489 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:35,426 INFO L93 Difference]: Finished difference Result 10067 states and 18959 transitions. [2021-11-03 03:40:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:40:35,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-03 03:40:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:35,462 INFO L225 Difference]: With dead ends: 10067 [2021-11-03 03:40:35,463 INFO L226 Difference]: Without dead ends: 5040 [2021-11-03 03:40:35,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2021-11-03 03:40:35,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 5040. [2021-11-03 03:40:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5040 states, 5035 states have (on average 1.883416087388282) internal successors, (9483), 5039 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 9483 transitions. [2021-11-03 03:40:35,656 INFO L78 Accepts]: Start accepts. Automaton has 5040 states and 9483 transitions. Word has length 29 [2021-11-03 03:40:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:35,657 INFO L470 AbstractCegarLoop]: Abstraction has 5040 states and 9483 transitions. [2021-11-03 03:40:35,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5040 states and 9483 transitions. [2021-11-03 03:40:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 03:40:35,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:35,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:35,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:35,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:35,882 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1792455045, now seen corresponding path program 1 times [2021-11-03 03:40:35,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:35,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880771435] [2021-11-03 03:40:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:35,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:35,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:35,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:35,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:40:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:36,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:40:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:36,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:36,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:36,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880771435] [2021-11-03 03:40:36,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880771435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:36,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:36,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:40:36,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079174241] [2021-11-03 03:40:36,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:40:36,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:36,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:40:36,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:40:36,417 INFO L87 Difference]: Start difference. First operand 5040 states and 9483 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:36,844 INFO L93 Difference]: Finished difference Result 10031 states and 18882 transitions. [2021-11-03 03:40:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:36,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 03:40:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:36,876 INFO L225 Difference]: With dead ends: 10031 [2021-11-03 03:40:36,876 INFO L226 Difference]: Without dead ends: 5013 [2021-11-03 03:40:36,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:40:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-11-03 03:40:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 5013. [2021-11-03 03:40:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5008 states have (on average 1.882388178913738) internal successors, (9427), 5012 states have internal predecessors, (9427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 9427 transitions. [2021-11-03 03:40:37,080 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 9427 transitions. Word has length 34 [2021-11-03 03:40:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:37,081 INFO L470 AbstractCegarLoop]: Abstraction has 5013 states and 9427 transitions. [2021-11-03 03:40:37,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 9427 transitions. [2021-11-03 03:40:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 03:40:37,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:37,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:37,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:37,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:37,301 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:37,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:37,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1461689437, now seen corresponding path program 1 times [2021-11-03 03:40:37,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:37,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392564704] [2021-11-03 03:40:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:37,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:37,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:37,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:37,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:40:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:40:37,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:37,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:37,878 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:37,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392564704] [2021-11-03 03:40:37,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392564704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:37,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:37,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:40:37,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100624194] [2021-11-03 03:40:37,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:37,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:37,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:37,882 INFO L87 Difference]: Start difference. First operand 5013 states and 9427 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:38,203 INFO L93 Difference]: Finished difference Result 10004 states and 18826 transitions. [2021-11-03 03:40:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:40:38,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-03 03:40:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:38,237 INFO L225 Difference]: With dead ends: 10004 [2021-11-03 03:40:38,237 INFO L226 Difference]: Without dead ends: 5013 [2021-11-03 03:40:38,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-11-03 03:40:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 5013. [2021-11-03 03:40:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5008 states have (on average 1.8811900958466454) internal successors, (9421), 5012 states have internal predecessors, (9421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 9421 transitions. [2021-11-03 03:40:38,478 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 9421 transitions. Word has length 35 [2021-11-03 03:40:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:38,479 INFO L470 AbstractCegarLoop]: Abstraction has 5013 states and 9421 transitions. [2021-11-03 03:40:38,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 9421 transitions. [2021-11-03 03:40:38,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 03:40:38,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:38,481 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:38,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:38,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:38,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:38,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:38,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1646874510, now seen corresponding path program 1 times [2021-11-03 03:40:38,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:38,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780169698] [2021-11-03 03:40:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:38,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:38,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:38,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:38,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:40:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 03:40:39,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:39,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:39,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:39,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780169698] [2021-11-03 03:40:39,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780169698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:39,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:39,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 03:40:39,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031269553] [2021-11-03 03:40:39,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:40:39,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:39,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:40:39,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:40:39,397 INFO L87 Difference]: Start difference. First operand 5013 states and 9421 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:39,818 INFO L93 Difference]: Finished difference Result 9998 states and 18809 transitions. [2021-11-03 03:40:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:40:39,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 03:40:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:39,859 INFO L225 Difference]: With dead ends: 9998 [2021-11-03 03:40:39,860 INFO L226 Difference]: Without dead ends: 5010 [2021-11-03 03:40:39,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:40:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2021-11-03 03:40:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 5010. [2021-11-03 03:40:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5010 states, 5005 states have (on average 1.8807192807192807) internal successors, (9413), 5009 states have internal predecessors, (9413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 9413 transitions. [2021-11-03 03:40:40,096 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 9413 transitions. Word has length 40 [2021-11-03 03:40:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:40,097 INFO L470 AbstractCegarLoop]: Abstraction has 5010 states and 9413 transitions. [2021-11-03 03:40:40,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:40,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 9413 transitions. [2021-11-03 03:40:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 03:40:40,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:40,098 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:40,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:40,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:40,312 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1034170530, now seen corresponding path program 1 times [2021-11-03 03:40:40,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:40,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680125049] [2021-11-03 03:40:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:40,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:40,315 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:40,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:40:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:40,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:40:40,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:40,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:41,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:41,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680125049] [2021-11-03 03:40:41,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680125049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:41,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:41,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:40:41,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747870150] [2021-11-03 03:40:41,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:41,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:41,140 INFO L87 Difference]: Start difference. First operand 5010 states and 9413 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:41,759 INFO L93 Difference]: Finished difference Result 13664 states and 25750 transitions. [2021-11-03 03:40:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:40:41,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 03:40:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:41,793 INFO L225 Difference]: With dead ends: 13664 [2021-11-03 03:40:41,793 INFO L226 Difference]: Without dead ends: 11117 [2021-11-03 03:40:41,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11117 states. [2021-11-03 03:40:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11117 to 6616. [2021-11-03 03:40:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6616 states, 6611 states have (on average 1.882619875964302) internal successors, (12446), 6615 states have internal predecessors, (12446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6616 states to 6616 states and 12446 transitions. [2021-11-03 03:40:42,175 INFO L78 Accepts]: Start accepts. Automaton has 6616 states and 12446 transitions. Word has length 41 [2021-11-03 03:40:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:42,175 INFO L470 AbstractCegarLoop]: Abstraction has 6616 states and 12446 transitions. [2021-11-03 03:40:42,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 6616 states and 12446 transitions. [2021-11-03 03:40:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 03:40:42,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:42,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:40:42,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:42,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:42,395 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:42,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1794145083, now seen corresponding path program 1 times [2021-11-03 03:40:42,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:42,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596183074] [2021-11-03 03:40:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:42,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:42,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:42,398 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:42,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:40:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:42,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:40:42,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:43,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:43,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:43,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596183074] [2021-11-03 03:40:43,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596183074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:43,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:43,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 03:40:43,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964859814] [2021-11-03 03:40:43,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:40:43,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:43,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:40:43,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:40:43,216 INFO L87 Difference]: Start difference. First operand 6616 states and 12446 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:44,040 INFO L93 Difference]: Finished difference Result 12592 states and 23478 transitions. [2021-11-03 03:40:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 03:40:44,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 03:40:44,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:44,060 INFO L225 Difference]: With dead ends: 12592 [2021-11-03 03:40:44,060 INFO L226 Difference]: Without dead ends: 7221 [2021-11-03 03:40:44,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:40:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2021-11-03 03:40:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 4905. [2021-11-03 03:40:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4900 states have (on average 1.8751020408163266) internal successors, (9188), 4904 states have internal predecessors, (9188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 9188 transitions. [2021-11-03 03:40:44,290 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 9188 transitions. Word has length 60 [2021-11-03 03:40:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:44,290 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 9188 transitions. [2021-11-03 03:40:44,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 9188 transitions. [2021-11-03 03:40:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 03:40:44,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:44,293 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, 1, 1, 1, 1, 1] [2021-11-03 03:40:44,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:44,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:44,517 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:44,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1044394081, now seen corresponding path program 1 times [2021-11-03 03:40:44,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:44,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951744784] [2021-11-03 03:40:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:44,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:44,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:44,520 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:44,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:40:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:40:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:45,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:45,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:45,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951744784] [2021-11-03 03:40:45,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951744784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:45,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:45,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:40:45,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754746691] [2021-11-03 03:40:45,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:40:45,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:45,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:40:45,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:40:45,307 INFO L87 Difference]: Start difference. First operand 4905 states and 9188 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:47,516 INFO L93 Difference]: Finished difference Result 18249 states and 34244 transitions. [2021-11-03 03:40:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:40:47,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 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 61 [2021-11-03 03:40:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:47,557 INFO L225 Difference]: With dead ends: 18249 [2021-11-03 03:40:47,558 INFO L226 Difference]: Without dead ends: 13378 [2021-11-03 03:40:47,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:40:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13378 states. [2021-11-03 03:40:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13378 to 4905. [2021-11-03 03:40:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4900 states have (on average 1.8404081632653062) internal successors, (9018), 4904 states have internal predecessors, (9018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 9018 transitions. [2021-11-03 03:40:47,924 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 9018 transitions. Word has length 61 [2021-11-03 03:40:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:47,924 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 9018 transitions. [2021-11-03 03:40:47,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 9018 transitions. [2021-11-03 03:40:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 03:40:47,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:47,930 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] [2021-11-03 03:40:47,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:48,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:48,144 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1730476365, now seen corresponding path program 1 times [2021-11-03 03:40:48,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:48,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087060925] [2021-11-03 03:40:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:48,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:48,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:48,146 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:48,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:40:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:48,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:40:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:48,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:48,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:48,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087060925] [2021-11-03 03:40:48,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087060925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:48,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:48,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:40:48,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810035166] [2021-11-03 03:40:48,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:40:48,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:48,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:40:48,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:40:48,995 INFO L87 Difference]: Start difference. First operand 4905 states and 9018 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:50,468 INFO L93 Difference]: Finished difference Result 13936 states and 25813 transitions. [2021-11-03 03:40:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:40:50,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 03:40:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:50,491 INFO L225 Difference]: With dead ends: 13936 [2021-11-03 03:40:50,491 INFO L226 Difference]: Without dead ends: 9083 [2021-11-03 03:40:50,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-03 03:40:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-11-03 03:40:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 4837. [2021-11-03 03:40:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4837 states, 4832 states have (on average 1.8406456953642385) internal successors, (8894), 4836 states have internal predecessors, (8894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4837 states to 4837 states and 8894 transitions. [2021-11-03 03:40:50,768 INFO L78 Accepts]: Start accepts. Automaton has 4837 states and 8894 transitions. Word has length 69 [2021-11-03 03:40:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:50,769 INFO L470 AbstractCegarLoop]: Abstraction has 4837 states and 8894 transitions. [2021-11-03 03:40:50,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4837 states and 8894 transitions. [2021-11-03 03:40:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 03:40:50,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:50,772 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] [2021-11-03 03:40:50,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:50,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:50,988 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:50,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1890046189, now seen corresponding path program 1 times [2021-11-03 03:40:50,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:50,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907598585] [2021-11-03 03:40:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:50,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:50,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:50,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:50,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 03:40:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:51,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:40:51,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:51,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:51,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:51,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907598585] [2021-11-03 03:40:51,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907598585] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:51,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:51,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:40:51,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965410920] [2021-11-03 03:40:51,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:40:51,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:51,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:40:51,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:40:51,874 INFO L87 Difference]: Start difference. First operand 4837 states and 8894 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:53,971 INFO L93 Difference]: Finished difference Result 19210 states and 35486 transitions. [2021-11-03 03:40:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:40:53,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 03:40:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:54,008 INFO L225 Difference]: With dead ends: 19210 [2021-11-03 03:40:54,008 INFO L226 Difference]: Without dead ends: 14424 [2021-11-03 03:40:54,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:40:54,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14424 states. [2021-11-03 03:40:54,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14424 to 4845. [2021-11-03 03:40:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4840 states have (on average 1.8392561983471074) internal successors, (8902), 4844 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 8902 transitions. [2021-11-03 03:40:54,450 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 8902 transitions. Word has length 71 [2021-11-03 03:40:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:54,451 INFO L470 AbstractCegarLoop]: Abstraction has 4845 states and 8902 transitions. [2021-11-03 03:40:54,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:54,451 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 8902 transitions. [2021-11-03 03:40:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 03:40:54,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:54,454 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] [2021-11-03 03:40:54,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:54,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:54,669 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash 792871044, now seen corresponding path program 1 times [2021-11-03 03:40:54,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:54,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981021062] [2021-11-03 03:40:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:54,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:54,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:54,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:54,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 03:40:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:40:55,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:55,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:55,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:55,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981021062] [2021-11-03 03:40:55,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981021062] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:55,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:55,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:40:55,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603326949] [2021-11-03 03:40:55,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:40:55,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:55,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:40:55,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:40:55,625 INFO L87 Difference]: Start difference. First operand 4845 states and 8902 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:57,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:40:57,587 INFO L93 Difference]: Finished difference Result 13857 states and 25562 transitions. [2021-11-03 03:40:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:40:57,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-03 03:40:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:40:57,605 INFO L225 Difference]: With dead ends: 13857 [2021-11-03 03:40:57,605 INFO L226 Difference]: Without dead ends: 9050 [2021-11-03 03:40:57,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:40:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2021-11-03 03:40:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 6214. [2021-11-03 03:40:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6209 states have (on average 1.8247704944435497) internal successors, (11330), 6213 states have internal predecessors, (11330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 11330 transitions. [2021-11-03 03:40:58,006 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 11330 transitions. Word has length 72 [2021-11-03 03:40:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:40:58,007 INFO L470 AbstractCegarLoop]: Abstraction has 6214 states and 11330 transitions. [2021-11-03 03:40:58,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:40:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 11330 transitions. [2021-11-03 03:40:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 03:40:58,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:40:58,010 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] [2021-11-03 03:40:58,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:40:58,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:40:58,231 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:40:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:40:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1620010700, now seen corresponding path program 1 times [2021-11-03 03:40:58,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:40:58,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130722094] [2021-11-03 03:40:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:40:58,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:40:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:40:58,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:40:58,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:40:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:40:58,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:40:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:40:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:59,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:40:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:40:59,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:40:59,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130722094] [2021-11-03 03:40:59,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130722094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:40:59,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:40:59,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:40:59,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513811699] [2021-11-03 03:40:59,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:40:59,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:40:59,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:40:59,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:40:59,300 INFO L87 Difference]: Start difference. First operand 6214 states and 11330 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:01,221 INFO L93 Difference]: Finished difference Result 46777 states and 85612 transitions. [2021-11-03 03:41:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:41:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 03:41:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:01,285 INFO L225 Difference]: With dead ends: 46777 [2021-11-03 03:41:01,286 INFO L226 Difference]: Without dead ends: 40610 [2021-11-03 03:41:01,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:41:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2021-11-03 03:41:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 11441. [2021-11-03 03:41:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11441 states, 11436 states have (on average 1.830097936341378) internal successors, (20929), 11440 states have internal predecessors, (20929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11441 states to 11441 states and 20929 transitions. [2021-11-03 03:41:02,140 INFO L78 Accepts]: Start accepts. Automaton has 11441 states and 20929 transitions. Word has length 74 [2021-11-03 03:41:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:02,140 INFO L470 AbstractCegarLoop]: Abstraction has 11441 states and 20929 transitions. [2021-11-03 03:41:02,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:02,141 INFO L276 IsEmpty]: Start isEmpty. Operand 11441 states and 20929 transitions. [2021-11-03 03:41:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 03:41:02,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:02,143 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] [2021-11-03 03:41:02,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:02,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:02,348 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:41:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:02,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1894770314, now seen corresponding path program 1 times [2021-11-03 03:41:02,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:02,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359424731] [2021-11-03 03:41:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:02,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:02,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:02,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:02,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 03:41:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:02,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:41:02,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:03,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:03,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:03,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359424731] [2021-11-03 03:41:03,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359424731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:03,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:03,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:41:03,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952094557] [2021-11-03 03:41:03,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:41:03,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:03,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:41:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:41:03,347 INFO L87 Difference]: Start difference. First operand 11441 states and 20929 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:04,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:04,821 INFO L93 Difference]: Finished difference Result 24150 states and 44207 transitions. [2021-11-03 03:41:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 03:41:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 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 74 [2021-11-03 03:41:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:04,847 INFO L225 Difference]: With dead ends: 24150 [2021-11-03 03:41:04,848 INFO L226 Difference]: Without dead ends: 17400 [2021-11-03 03:41:04,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:41:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17400 states. [2021-11-03 03:41:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17400 to 11425. [2021-11-03 03:41:05,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11425 states, 11420 states have (on average 1.8298598949211908) internal successors, (20897), 11424 states have internal predecessors, (20897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11425 states to 11425 states and 20897 transitions. [2021-11-03 03:41:05,671 INFO L78 Accepts]: Start accepts. Automaton has 11425 states and 20897 transitions. Word has length 74 [2021-11-03 03:41:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:05,671 INFO L470 AbstractCegarLoop]: Abstraction has 11425 states and 20897 transitions. [2021-11-03 03:41:05,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 11425 states and 20897 transitions. [2021-11-03 03:41:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 03:41:05,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:05,675 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] [2021-11-03 03:41:05,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:05,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:05,890 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:41:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:05,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1064271952, now seen corresponding path program 1 times [2021-11-03 03:41:05,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:05,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521070606] [2021-11-03 03:41:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:05,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:05,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:05,892 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:05,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 03:41:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:06,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:41:06,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:06,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:06,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:06,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521070606] [2021-11-03 03:41:06,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521070606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:06,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:06,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:41:06,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305269001] [2021-11-03 03:41:06,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:41:06,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:41:06,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:41:06,956 INFO L87 Difference]: Start difference. First operand 11425 states and 20897 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:08,980 INFO L93 Difference]: Finished difference Result 45677 states and 84009 transitions. [2021-11-03 03:41:08,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 03:41:08,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-03 03:41:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:09,033 INFO L225 Difference]: With dead ends: 45677 [2021-11-03 03:41:09,033 INFO L226 Difference]: Without dead ends: 38939 [2021-11-03 03:41:09,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:41:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38939 states. [2021-11-03 03:41:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38939 to 17614. [2021-11-03 03:41:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17614 states, 17609 states have (on average 1.82866715883923) internal successors, (32201), 17613 states have internal predecessors, (32201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17614 states to 17614 states and 32201 transitions. [2021-11-03 03:41:10,132 INFO L78 Accepts]: Start accepts. Automaton has 17614 states and 32201 transitions. Word has length 76 [2021-11-03 03:41:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:10,132 INFO L470 AbstractCegarLoop]: Abstraction has 17614 states and 32201 transitions. [2021-11-03 03:41:10,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 17614 states and 32201 transitions. [2021-11-03 03:41:10,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 03:41:10,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:10,135 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] [2021-11-03 03:41:10,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:10,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:10,350 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:41:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:10,351 INFO L85 PathProgramCache]: Analyzing trace with hash 203497508, now seen corresponding path program 1 times [2021-11-03 03:41:10,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:10,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612218936] [2021-11-03 03:41:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:10,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:10,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:10,353 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:10,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:41:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:41:11,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:11,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:11,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:11,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612218936] [2021-11-03 03:41:11,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612218936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:11,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:11,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:41:11,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780524717] [2021-11-03 03:41:11,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:41:11,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:11,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:41:11,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:41:11,516 INFO L87 Difference]: Start difference. First operand 17614 states and 32201 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:18,051 INFO L93 Difference]: Finished difference Result 97579 states and 179519 transitions. [2021-11-03 03:41:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:41:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 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 78 [2021-11-03 03:41:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:18,178 INFO L225 Difference]: With dead ends: 97579 [2021-11-03 03:41:18,178 INFO L226 Difference]: Without dead ends: 84652 [2021-11-03 03:41:18,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:41:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84652 states. [2021-11-03 03:41:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84652 to 28564. [2021-11-03 03:41:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28564 states, 28559 states have (on average 1.8365138835393395) internal successors, (52449), 28563 states have internal predecessors, (52449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28564 states to 28564 states and 52449 transitions. [2021-11-03 03:41:20,431 INFO L78 Accepts]: Start accepts. Automaton has 28564 states and 52449 transitions. Word has length 78 [2021-11-03 03:41:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:20,431 INFO L470 AbstractCegarLoop]: Abstraction has 28564 states and 52449 transitions. [2021-11-03 03:41:20,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 28564 states and 52449 transitions. [2021-11-03 03:41:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 03:41:20,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:20,434 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] [2021-11-03 03:41:20,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:20,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:20,635 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:41:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1034283597, now seen corresponding path program 1 times [2021-11-03 03:41:20,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:20,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689450834] [2021-11-03 03:41:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:20,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:20,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:20,638 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:20,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 03:41:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:41:21,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:21,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:21,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:21,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689450834] [2021-11-03 03:41:21,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689450834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:21,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:21,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:41:21,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935172702] [2021-11-03 03:41:21,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:41:21,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:21,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:41:21,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:41:21,798 INFO L87 Difference]: Start difference. First operand 28564 states and 52449 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:23,467 INFO L93 Difference]: Finished difference Result 52573 states and 96410 transitions. [2021-11-03 03:41:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:41:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 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 85 [2021-11-03 03:41:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:23,499 INFO L225 Difference]: With dead ends: 52573 [2021-11-03 03:41:23,499 INFO L226 Difference]: Without dead ends: 28579 [2021-11-03 03:41:23,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:41:23,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28579 states. [2021-11-03 03:41:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28579 to 28564. [2021-11-03 03:41:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28564 states, 28559 states have (on average 1.8296508981406912) internal successors, (52253), 28563 states have internal predecessors, (52253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28564 states to 28564 states and 52253 transitions. [2021-11-03 03:41:25,271 INFO L78 Accepts]: Start accepts. Automaton has 28564 states and 52253 transitions. Word has length 85 [2021-11-03 03:41:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:25,271 INFO L470 AbstractCegarLoop]: Abstraction has 28564 states and 52253 transitions. [2021-11-03 03:41:25,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 28564 states and 52253 transitions. [2021-11-03 03:41:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 03:41:25,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:25,274 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] [2021-11-03 03:41:25,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-03 03:41:25,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:25,478 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:41:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash -937572823, now seen corresponding path program 1 times [2021-11-03 03:41:25,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:25,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303116234] [2021-11-03 03:41:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:25,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:25,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:25,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:25,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 03:41:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:26,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:41:26,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:26,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:26,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:26,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303116234] [2021-11-03 03:41:26,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303116234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:26,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:26,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:41:26,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592156317] [2021-11-03 03:41:26,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:41:26,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:41:26,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:41:26,769 INFO L87 Difference]: Start difference. First operand 28564 states and 52253 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:32,365 INFO L93 Difference]: Finished difference Result 83105 states and 151825 transitions. [2021-11-03 03:41:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:41:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 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 86 [2021-11-03 03:41:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:32,443 INFO L225 Difference]: With dead ends: 83105 [2021-11-03 03:41:32,443 INFO L226 Difference]: Without dead ends: 59449 [2021-11-03 03:41:32,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:41:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59449 states. [2021-11-03 03:41:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59449 to 23780. [2021-11-03 03:41:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23780 states, 23775 states have (on average 1.8201051524710832) internal successors, (43273), 23779 states have internal predecessors, (43273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23780 states to 23780 states and 43273 transitions. [2021-11-03 03:41:34,066 INFO L78 Accepts]: Start accepts. Automaton has 23780 states and 43273 transitions. Word has length 86 [2021-11-03 03:41:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:41:34,066 INFO L470 AbstractCegarLoop]: Abstraction has 23780 states and 43273 transitions. [2021-11-03 03:41:34,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 23780 states and 43273 transitions. [2021-11-03 03:41:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 03:41:34,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:41:34,069 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] [2021-11-03 03:41:34,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 03:41:34,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:41:34,271 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:41:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:41:34,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1948690073, now seen corresponding path program 1 times [2021-11-03 03:41:34,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:41:34,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788349009] [2021-11-03 03:41:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:41:34,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:41:34,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:41:34,273 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:41:34,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5f6518-13ed-4e3a-a6bd-2c78b68a9692/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 03:41:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:41:35,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:41:35,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:41:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:35,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:41:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:41:35,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:41:35,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788349009] [2021-11-03 03:41:35,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788349009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:41:35,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:41:35,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 03:41:35,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716941998] [2021-11-03 03:41:35,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:41:35,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:41:35,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:41:35,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:41:35,579 INFO L87 Difference]: Start difference. First operand 23780 states and 43273 transitions. Second operand has 10 states, 10 states have (on average 16.3) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:41:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:41:54,076 INFO L93 Difference]: Finished difference Result 164655 states and 297669 transitions. [2021-11-03 03:41:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 03:41:54,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.3) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 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 86 [2021-11-03 03:41:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:41:54,498 INFO L225 Difference]: With dead ends: 164655 [2021-11-03 03:41:54,498 INFO L226 Difference]: Without dead ends: 142876 [2021-11-03 03:41:54,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 03:41:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142876 states.