./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl --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 60c415120e2678b24f3b884ebcebefc19905a98d476a557ead28c297441bd0dd --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:36:30,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:36:30,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:36:30,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:36:30,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:36:30,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:36:30,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:36:30,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:36:30,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:36:30,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:36:30,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:36:30,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:36:30,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:36:30,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:36:30,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:36:30,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:36:30,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:36:30,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:36:30,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:36:30,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:36:30,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:36:30,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:36:30,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:36:30,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:36:30,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:36:30,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:36:30,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:36:30,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:36:30,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:36:30,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:36:30,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:36:30,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:36:30,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:36:30,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:36:30,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:36:30,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:36:30,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:36:30,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:36:30,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:36:30,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:36:30,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:36:30,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:36:30,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:36:30,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:36:30,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:36:30,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:36:30,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:36:30,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:36:30,968 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:36:30,968 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:36:30,969 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:36:30,969 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:36:30,969 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:36:30,969 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:36:30,969 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:36:30,970 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:36:30,970 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:36:30,970 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:36:30,970 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:36:30,970 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:36:30,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:36:30,972 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:36:30,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:36:30,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:36:30,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:36:30,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:36:30,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:36:30,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:36:30,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:36:30,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:36:30,973 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:36:30,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:36:30,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:36:30,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:36:30,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:36:30,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:36:30,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:36:30,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:36:30,975 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:36:30,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:36:30,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:36:30,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:36:30,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:36:30,976 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_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60c415120e2678b24f3b884ebcebefc19905a98d476a557ead28c297441bd0dd [2021-11-23 17:36:31,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:36:31,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:36:31,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:36:31,357 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:36:31,357 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:36:31,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-23 17:36:31,469 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/data/e2db89e8b/df12e61da7d24db7b6eb668dbeced526/FLAG532390cc3 [2021-11-23 17:36:32,073 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:36:32,074 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-23 17:36:32,095 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/data/e2db89e8b/df12e61da7d24db7b6eb668dbeced526/FLAG532390cc3 [2021-11-23 17:36:32,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/data/e2db89e8b/df12e61da7d24db7b6eb668dbeced526 [2021-11-23 17:36:32,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:36:32,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:36:32,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:36:32,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:36:32,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:36:32,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:36:32" (1/1) ... [2021-11-23 17:36:32,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4107d5c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:32, skipping insertion in model container [2021-11-23 17:36:32,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:36:32" (1/1) ... [2021-11-23 17:36:32,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:36:32,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:36:32,787 WARN L230 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_2f05bd47-6946-40c9-bd6c-91c216ad77cd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2021-11-23 17:36:32,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:36:32,923 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:36:33,036 WARN L230 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_2f05bd47-6946-40c9-bd6c-91c216ad77cd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2021-11-23 17:36:33,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:36:33,115 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:36:33,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33 WrapperNode [2021-11-23 17:36:33,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:36:33,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:36:33,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:36:33,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:36:33,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33" (1/1) ... [2021-11-23 17:36:33,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33" (1/1) ... [2021-11-23 17:36:33,215 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1297 [2021-11-23 17:36:33,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:36:33,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:36:33,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:36:33,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:36:33,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33" (1/1) ... [2021-11-23 17:36:33,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33" (1/1) ... [2021-11-23 17:36:33,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33" (1/1) ... [2021-11-23 17:36:33,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33" (1/1) ... [2021-11-23 17:36:33,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33" (1/1) ... [2021-11-23 17:36:33,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33" (1/1) ... [2021-11-23 17:36:33,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33" (1/1) ... [2021-11-23 17:36:33,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:36:33,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:36:33,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:36:33,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:36:33,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:33" (1/1) ... [2021-11-23 17:36:33,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:36:33,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:33,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:36:33,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:36:33,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:36:33,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:36:33,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:36:33,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:36:33,671 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:36:33,673 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:36:34,866 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:36:34,973 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:36:34,979 INFO L158 Benchmark]: Toolchain (without parser) took 2612.62ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 55.0MB in the beginning and 84.8MB in the end (delta: -29.7MB). Peak memory consumption was 58.0MB. Max. memory is 16.1GB. [2021-11-23 17:36:34,981 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 92.3MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 28.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:36:34,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 745.86ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 54.8MB in the beginning and 75.1MB in the end (delta: -20.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:36:34,983 INFO L158 Benchmark]: Boogie Procedure Inliner took 99.69ms. Allocated memory is still 117.4MB. Free memory was 75.1MB in the beginning and 69.8MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 17:36:34,984 INFO L158 Benchmark]: Boogie Preprocessor took 75.88ms. Allocated memory is still 117.4MB. Free memory was 69.8MB in the beginning and 66.1MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 17:36:34,985 INFO L158 Benchmark]: RCFGBuilder took 1683.05ms. Allocated memory is still 117.4MB. Free memory was 66.1MB in the beginning and 84.8MB in the end (delta: -18.6MB). Peak memory consumption was 45.6MB. Max. memory is 16.1GB. [2021-11-23 17:36:34,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 92.3MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 28.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 745.86ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 54.8MB in the beginning and 75.1MB in the end (delta: -20.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 99.69ms. Allocated memory is still 117.4MB. Free memory was 75.1MB in the beginning and 69.8MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 75.88ms. Allocated memory is still 117.4MB. Free memory was 69.8MB in the beginning and 66.1MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1683.05ms. Allocated memory is still 117.4MB. Free memory was 66.1MB in the beginning and 84.8MB in the end (delta: -18.6MB). Peak memory consumption was 45.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:36:35,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl --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 60c415120e2678b24f3b884ebcebefc19905a98d476a557ead28c297441bd0dd --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:36:37,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:36:37,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:36:37,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:36:37,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:36:37,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:36:37,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:36:37,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:36:37,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:36:37,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:36:37,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:36:37,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:36:37,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:36:37,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:36:37,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:36:37,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:36:37,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:36:37,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:36:37,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:36:37,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:36:37,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:36:37,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:36:37,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:36:37,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:36:37,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:36:37,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:36:37,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:36:37,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:36:37,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:36:37,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:36:37,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:36:37,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:36:37,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:36:37,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:36:37,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:36:37,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:36:37,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:36:37,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:36:37,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:36:37,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:36:37,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:36:37,785 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:36:37,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:36:37,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:36:37,832 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:36:37,832 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:36:37,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:36:37,833 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:36:37,834 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:36:37,834 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:36:37,834 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:36:37,834 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:36:37,835 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:36:37,836 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:36:37,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:36:37,838 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:36:37,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:36:37,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:36:37,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:36:37,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:36:37,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:36:37,839 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:36:37,840 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:36:37,840 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:36:37,840 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:36:37,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:36:37,841 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:36:37,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:36:37,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:36:37,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:36:37,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:36:37,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:36:37,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:36:37,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:36:37,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:36:37,843 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:36:37,843 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:37,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:36:37,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:36:37,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:36:37,844 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_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60c415120e2678b24f3b884ebcebefc19905a98d476a557ead28c297441bd0dd [2021-11-23 17:36:38,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:36:38,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:36:38,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:36:38,242 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:36:38,243 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:36:38,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-23 17:36:38,323 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/data/f5b9d1306/ec1360bf3320489b8ad93e77f1118def/FLAG96e431343 [2021-11-23 17:36:39,032 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:36:39,032 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-23 17:36:39,051 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/data/f5b9d1306/ec1360bf3320489b8ad93e77f1118def/FLAG96e431343 [2021-11-23 17:36:39,239 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/data/f5b9d1306/ec1360bf3320489b8ad93e77f1118def [2021-11-23 17:36:39,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:36:39,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:36:39,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:36:39,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:36:39,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:36:39,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:36:39" (1/1) ... [2021-11-23 17:36:39,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c89628c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:39, skipping insertion in model container [2021-11-23 17:36:39,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:36:39" (1/1) ... [2021-11-23 17:36:39,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:36:39,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:36:39,805 WARN L230 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_2f05bd47-6946-40c9-bd6c-91c216ad77cd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2021-11-23 17:36:39,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:36:39,965 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:36:40,096 WARN L230 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_2f05bd47-6946-40c9-bd6c-91c216ad77cd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2021-11-23 17:36:40,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:36:40,223 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:36:40,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40 WrapperNode [2021-11-23 17:36:40,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:36:40,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:36:40,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:36:40,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:36:40,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (1/1) ... [2021-11-23 17:36:40,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (1/1) ... [2021-11-23 17:36:40,374 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1277 [2021-11-23 17:36:40,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:36:40,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:36:40,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:36:40,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:36:40,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (1/1) ... [2021-11-23 17:36:40,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (1/1) ... [2021-11-23 17:36:40,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (1/1) ... [2021-11-23 17:36:40,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (1/1) ... [2021-11-23 17:36:40,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (1/1) ... [2021-11-23 17:36:40,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (1/1) ... [2021-11-23 17:36:40,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (1/1) ... [2021-11-23 17:36:40,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:36:40,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:36:40,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:36:40,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:36:40,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (1/1) ... [2021-11-23 17:36:40,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:36:40,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:40,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:36:40,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:36:40,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:36:40,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:36:40,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:36:40,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:36:40,835 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:36:40,837 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:36:41,772 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:36:41,785 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:36:41,785 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 17:36:41,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:36:41 BoogieIcfgContainer [2021-11-23 17:36:41,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:36:41,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:36:41,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:36:41,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:36:41,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:36:39" (1/3) ... [2021-11-23 17:36:41,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37effd0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:36:41, skipping insertion in model container [2021-11-23 17:36:41,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:40" (2/3) ... [2021-11-23 17:36:41,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37effd0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:36:41, skipping insertion in model container [2021-11-23 17:36:41,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:36:41" (3/3) ... [2021-11-23 17:36:41,796 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-23 17:36:41,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:36:41,802 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:36:41,856 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:36:41,879 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 [2021-11-23 17:36:41,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:36:41,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 326 states, 324 states have (on average 1.7962962962962963) internal successors, (582), 325 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 17:36:41,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:41,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:41,963 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash 430105228, now seen corresponding path program 1 times [2021-11-23 17:36:41,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:41,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532861272] [2021-11-23 17:36:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:41,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:41,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:41,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:41,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:36:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:42,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:36:42,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:42,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:42,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:42,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532861272] [2021-11-23 17:36:42,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532861272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:42,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:42,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:36:42,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968065478] [2021-11-23 17:36:42,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:42,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:36:42,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:42,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:36:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:42,732 INFO L87 Difference]: Start difference. First operand has 326 states, 324 states have (on average 1.7962962962962963) internal successors, (582), 325 states have internal predecessors, (582), 0 states have call successors, (0), 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 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:42,930 INFO L93 Difference]: Finished difference Result 589 states and 1021 transitions. [2021-11-23 17:36:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:36:42,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-23 17:36:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:42,963 INFO L225 Difference]: With dead ends: 589 [2021-11-23 17:36:42,963 INFO L226 Difference]: Without dead ends: 446 [2021-11-23 17:36:42,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:42,983 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 232 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:42,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1074 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:36:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-23 17:36:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 443. [2021-11-23 17:36:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.660633484162896) internal successors, (734), 442 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:43,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 734 transitions. [2021-11-23 17:36:43,147 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 734 transitions. Word has length 110 [2021-11-23 17:36:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:43,148 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 734 transitions. [2021-11-23 17:36:43,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 734 transitions. [2021-11-23 17:36:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 17:36:43,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:43,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:43,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:43,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:43,367 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1228540371, now seen corresponding path program 1 times [2021-11-23 17:36:43,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:43,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575554005] [2021-11-23 17:36:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:43,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:43,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:43,372 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:43,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:36:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:43,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:36:43,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:43,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:43,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:43,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575554005] [2021-11-23 17:36:43,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575554005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:43,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:43,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:36:43,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68265138] [2021-11-23 17:36:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:43,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:36:43,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:43,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:36:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:36:43,925 INFO L87 Difference]: Start difference. First operand 443 states and 734 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:44,103 INFO L93 Difference]: Finished difference Result 1299 states and 2151 transitions. [2021-11-23 17:36:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:36:44,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-11-23 17:36:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:44,121 INFO L225 Difference]: With dead ends: 1299 [2021-11-23 17:36:44,122 INFO L226 Difference]: Without dead ends: 867 [2021-11-23 17:36:44,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:36:44,130 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 1432 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:44,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 1052 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:36:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-11-23 17:36:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 865. [2021-11-23 17:36:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 1.6493055555555556) internal successors, (1425), 864 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1425 transitions. [2021-11-23 17:36:44,250 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1425 transitions. Word has length 113 [2021-11-23 17:36:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:44,253 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 1425 transitions. [2021-11-23 17:36:44,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1425 transitions. [2021-11-23 17:36:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 17:36:44,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:44,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:44,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:36:44,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:44,476 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1079104924, now seen corresponding path program 1 times [2021-11-23 17:36:44,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:44,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61686575] [2021-11-23 17:36:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:44,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:44,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:44,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:44,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:36:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:36:44,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:44,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:44,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61686575] [2021-11-23 17:36:44,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61686575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:44,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:44,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:36:44,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841307126] [2021-11-23 17:36:44,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:44,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:36:44,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:44,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:36:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:44,951 INFO L87 Difference]: Start difference. First operand 865 states and 1425 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:45,039 INFO L93 Difference]: Finished difference Result 1339 states and 2230 transitions. [2021-11-23 17:36:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:36:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-11-23 17:36:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:45,051 INFO L225 Difference]: With dead ends: 1339 [2021-11-23 17:36:45,051 INFO L226 Difference]: Without dead ends: 1076 [2021-11-23 17:36:45,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:45,056 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 205 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:45,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1204 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:36:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-11-23 17:36:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1074. [2021-11-23 17:36:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 1.6589002795899348) internal successors, (1780), 1073 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1780 transitions. [2021-11-23 17:36:45,131 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1780 transitions. Word has length 115 [2021-11-23 17:36:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:45,132 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1780 transitions. [2021-11-23 17:36:45,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1780 transitions. [2021-11-23 17:36:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 17:36:45,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:45,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:45,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:45,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:45,348 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:45,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1026029946, now seen corresponding path program 1 times [2021-11-23 17:36:45,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:45,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134636385] [2021-11-23 17:36:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:45,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:45,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:45,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:45,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:36:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:36:45,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:45,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:45,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:45,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134636385] [2021-11-23 17:36:45,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134636385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:45,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:45,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:36:45,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216907729] [2021-11-23 17:36:45,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:45,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:36:45,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:36:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:45,723 INFO L87 Difference]: Start difference. First operand 1074 states and 1780 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:45,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:45,852 INFO L93 Difference]: Finished difference Result 3185 states and 5277 transitions. [2021-11-23 17:36:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:36:45,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-11-23 17:36:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:45,866 INFO L225 Difference]: With dead ends: 3185 [2021-11-23 17:36:45,867 INFO L226 Difference]: Without dead ends: 2132 [2021-11-23 17:36:45,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:45,870 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 520 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:45,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1567 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:36:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-11-23 17:36:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1087. [2021-11-23 17:36:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 1.656537753222836) internal successors, (1799), 1086 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1799 transitions. [2021-11-23 17:36:45,966 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1799 transitions. Word has length 115 [2021-11-23 17:36:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:45,966 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1799 transitions. [2021-11-23 17:36:45,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1799 transitions. [2021-11-23 17:36:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 17:36:45,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:45,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:45,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:46,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:46,182 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1732658027, now seen corresponding path program 1 times [2021-11-23 17:36:46,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:46,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677821585] [2021-11-23 17:36:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:46,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:46,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:46,185 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:46,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:36:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:46,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:36:46,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:46,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:46,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:46,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677821585] [2021-11-23 17:36:46,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677821585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:46,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:46,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:36:46,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525355562] [2021-11-23 17:36:46,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:46,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:36:46,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:46,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:36:46,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:36:46,625 INFO L87 Difference]: Start difference. First operand 1087 states and 1799 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:46,857 INFO L93 Difference]: Finished difference Result 3170 states and 5248 transitions. [2021-11-23 17:36:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:36:46,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-11-23 17:36:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:46,874 INFO L225 Difference]: With dead ends: 3170 [2021-11-23 17:36:46,874 INFO L226 Difference]: Without dead ends: 2110 [2021-11-23 17:36:46,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:36:46,877 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 1240 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:46,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 1232 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:36:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-11-23 17:36:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 2108. [2021-11-23 17:36:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 1.6473659231134314) internal successors, (3471), 2107 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3471 transitions. [2021-11-23 17:36:47,103 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3471 transitions. Word has length 115 [2021-11-23 17:36:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:47,103 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 3471 transitions. [2021-11-23 17:36:47,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3471 transitions. [2021-11-23 17:36:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:36:47,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:47,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:47,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:47,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:47,320 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:47,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1532340708, now seen corresponding path program 1 times [2021-11-23 17:36:47,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:47,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667712309] [2021-11-23 17:36:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:47,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:47,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:47,323 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:47,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:36:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:47,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:36:47,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:47,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:47,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:47,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667712309] [2021-11-23 17:36:47,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667712309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:47,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:47,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:36:47,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193228169] [2021-11-23 17:36:47,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:47,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:36:47,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:47,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:36:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:47,643 INFO L87 Difference]: Start difference. First operand 2108 states and 3471 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:47,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:47,981 INFO L93 Difference]: Finished difference Result 6253 states and 10298 transitions. [2021-11-23 17:36:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:36:47,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-23 17:36:47,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:48,012 INFO L225 Difference]: With dead ends: 6253 [2021-11-23 17:36:48,013 INFO L226 Difference]: Without dead ends: 4188 [2021-11-23 17:36:48,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:48,018 INFO L933 BasicCegarLoop]: 1045 mSDtfsCounter, 514 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:48,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 1566 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:36:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-11-23 17:36:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 2122. [2021-11-23 17:36:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 1.644035832154644) internal successors, (3487), 2121 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3487 transitions. [2021-11-23 17:36:48,248 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3487 transitions. Word has length 117 [2021-11-23 17:36:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:48,248 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 3487 transitions. [2021-11-23 17:36:48,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3487 transitions. [2021-11-23 17:36:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:36:48,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:48,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:48,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:48,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:48,468 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash -560088205, now seen corresponding path program 1 times [2021-11-23 17:36:48,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:48,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767423719] [2021-11-23 17:36:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:48,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:48,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:48,470 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:48,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:36:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:48,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:36:48,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:48,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:48,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:48,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767423719] [2021-11-23 17:36:48,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767423719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:48,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:48,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:36:48,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786821102] [2021-11-23 17:36:48,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:48,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:36:48,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:36:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:36:48,876 INFO L87 Difference]: Start difference. First operand 2122 states and 3487 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:49,309 INFO L93 Difference]: Finished difference Result 6233 states and 10258 transitions. [2021-11-23 17:36:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:36:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-11-23 17:36:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:49,335 INFO L225 Difference]: With dead ends: 6233 [2021-11-23 17:36:49,335 INFO L226 Difference]: Without dead ends: 4152 [2021-11-23 17:36:49,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:36:49,341 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 1232 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:49,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 1227 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:36:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4152 states. [2021-11-23 17:36:49,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4152 to 4150. [2021-11-23 17:36:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4150 states, 4149 states have (on average 1.636538925042179) internal successors, (6790), 4149 states have internal predecessors, (6790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4150 states to 4150 states and 6790 transitions. [2021-11-23 17:36:49,785 INFO L78 Accepts]: Start accepts. Automaton has 4150 states and 6790 transitions. Word has length 118 [2021-11-23 17:36:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:49,785 INFO L470 AbstractCegarLoop]: Abstraction has 4150 states and 6790 transitions. [2021-11-23 17:36:49,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4150 states and 6790 transitions. [2021-11-23 17:36:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:36:49,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:49,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:49,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:50,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:50,005 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:50,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:50,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1012940117, now seen corresponding path program 1 times [2021-11-23 17:36:50,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:50,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260786142] [2021-11-23 17:36:50,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:50,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:50,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:50,007 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:50,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:36:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:36:50,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:50,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:50,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:50,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260786142] [2021-11-23 17:36:50,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260786142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:50,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:50,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:36:50,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394190860] [2021-11-23 17:36:50,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:50,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:36:50,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:36:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:36:50,397 INFO L87 Difference]: Start difference. First operand 4150 states and 6790 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:51,439 INFO L93 Difference]: Finished difference Result 14505 states and 23598 transitions. [2021-11-23 17:36:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:36:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-23 17:36:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:51,519 INFO L225 Difference]: With dead ends: 14505 [2021-11-23 17:36:51,520 INFO L226 Difference]: Without dead ends: 10899 [2021-11-23 17:36:51,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:36:51,528 INFO L933 BasicCegarLoop]: 1221 mSDtfsCounter, 1206 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:51,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 2646 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:36:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10899 states. [2021-11-23 17:36:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10899 to 4611. [2021-11-23 17:36:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 1.640997830802603) internal successors, (7565), 4610 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 7565 transitions. [2021-11-23 17:36:52,149 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 7565 transitions. Word has length 119 [2021-11-23 17:36:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 4611 states and 7565 transitions. [2021-11-23 17:36:52,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 7565 transitions. [2021-11-23 17:36:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 17:36:52,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:52,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:52,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:52,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:52,372 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:52,372 INFO L85 PathProgramCache]: Analyzing trace with hash -974027627, now seen corresponding path program 1 times [2021-11-23 17:36:52,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:52,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505360134] [2021-11-23 17:36:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:52,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:52,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:52,374 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:52,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:36:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:36:52,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:52,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:52,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:52,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505360134] [2021-11-23 17:36:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505360134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:52,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:52,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:36:52,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950773196] [2021-11-23 17:36:52,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:52,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:36:52,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:36:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:52,748 INFO L87 Difference]: Start difference. First operand 4611 states and 7565 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:53,449 INFO L93 Difference]: Finished difference Result 9843 states and 16275 transitions. [2021-11-23 17:36:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:36:53,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-23 17:36:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:53,469 INFO L225 Difference]: With dead ends: 9843 [2021-11-23 17:36:53,469 INFO L226 Difference]: Without dead ends: 7125 [2021-11-23 17:36:53,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:53,477 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 197 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:53,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1029 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:36:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7125 states. [2021-11-23 17:36:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7125 to 7099. [2021-11-23 17:36:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 1.6428571428571428) internal successors, (11661), 7098 states have internal predecessors, (11661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 11661 transitions. [2021-11-23 17:36:54,111 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 11661 transitions. Word has length 120 [2021-11-23 17:36:54,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:54,111 INFO L470 AbstractCegarLoop]: Abstraction has 7099 states and 11661 transitions. [2021-11-23 17:36:54,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 11661 transitions. [2021-11-23 17:36:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 17:36:54,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:54,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:54,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:54,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:54,335 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:54,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1084139762, now seen corresponding path program 1 times [2021-11-23 17:36:54,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:54,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803376092] [2021-11-23 17:36:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:54,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:54,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:54,338 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:54,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:36:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:54,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:36:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:54,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:54,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:54,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803376092] [2021-11-23 17:36:54,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803376092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:54,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:54,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:36:54,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278464633] [2021-11-23 17:36:54,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:54,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:36:54,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:54,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:36:54,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:36:54,733 INFO L87 Difference]: Start difference. First operand 7099 states and 11661 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:56,062 INFO L93 Difference]: Finished difference Result 20603 states and 33875 transitions. [2021-11-23 17:36:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:36:56,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-23 17:36:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:56,105 INFO L225 Difference]: With dead ends: 20603 [2021-11-23 17:36:56,105 INFO L226 Difference]: Without dead ends: 13739 [2021-11-23 17:36:56,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:36:56,118 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 1219 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:56,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 1184 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:36:56,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2021-11-23 17:36:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 13737. [2021-11-23 17:36:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 1.634391380314502) internal successors, (22450), 13736 states have internal predecessors, (22450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 22450 transitions. [2021-11-23 17:36:57,459 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 22450 transitions. Word has length 123 [2021-11-23 17:36:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:57,459 INFO L470 AbstractCegarLoop]: Abstraction has 13737 states and 22450 transitions. [2021-11-23 17:36:57,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:57,460 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 22450 transitions. [2021-11-23 17:36:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 17:36:57,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:57,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:57,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:57,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:57,688 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:57,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:57,689 INFO L85 PathProgramCache]: Analyzing trace with hash -195495729, now seen corresponding path program 1 times [2021-11-23 17:36:57,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:57,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646355425] [2021-11-23 17:36:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:57,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:57,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:57,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:57,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:36:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:57,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:36:57,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:58,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:58,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:58,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646355425] [2021-11-23 17:36:58,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646355425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:58,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:58,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:36:58,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941143599] [2021-11-23 17:36:58,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:58,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:36:58,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:58,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:36:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:58,073 INFO L87 Difference]: Start difference. First operand 13737 states and 22450 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:59,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:59,649 INFO L93 Difference]: Finished difference Result 37921 states and 61772 transitions. [2021-11-23 17:36:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:36:59,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-11-23 17:36:59,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:59,715 INFO L225 Difference]: With dead ends: 37921 [2021-11-23 17:36:59,716 INFO L226 Difference]: Without dead ends: 26011 [2021-11-23 17:36:59,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:59,737 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 395 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:59,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 1369 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:36:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26011 states. [2021-11-23 17:37:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26011 to 26009. [2021-11-23 17:37:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 1.6226545678252846) internal successors, (42202), 26008 states have internal predecessors, (42202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 42202 transitions. [2021-11-23 17:37:02,306 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 42202 transitions. Word has length 125 [2021-11-23 17:37:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:02,306 INFO L470 AbstractCegarLoop]: Abstraction has 26009 states and 42202 transitions. [2021-11-23 17:37:02,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 42202 transitions. [2021-11-23 17:37:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-23 17:37:02,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:02,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:02,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:02,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:37:02,543 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:02,543 INFO L85 PathProgramCache]: Analyzing trace with hash -545986246, now seen corresponding path program 1 times [2021-11-23 17:37:02,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:02,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131945546] [2021-11-23 17:37:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:02,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:02,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:02,545 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:02,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:37:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:37:02,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:02,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:37:02,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:02,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131945546] [2021-11-23 17:37:02,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131945546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:37:02,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:37:02,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:37:02,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906702349] [2021-11-23 17:37:02,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:37:02,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:37:02,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:37:02,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:37:02,939 INFO L87 Difference]: Start difference. First operand 26009 states and 42202 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:04,967 INFO L93 Difference]: Finished difference Result 45005 states and 73692 transitions. [2021-11-23 17:37:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:37:04,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-23 17:37:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:05,035 INFO L225 Difference]: With dead ends: 45005 [2021-11-23 17:37:05,035 INFO L226 Difference]: Without dead ends: 34555 [2021-11-23 17:37:05,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:37:05,055 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 196 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:05,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1186 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:37:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34555 states. [2021-11-23 17:37:07,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34555 to 34553. [2021-11-23 17:37:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34553 states, 34552 states have (on average 1.6275179439685112) internal successors, (56234), 34552 states have internal predecessors, (56234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:07,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34553 states to 34553 states and 56234 transitions. [2021-11-23 17:37:07,864 INFO L78 Accepts]: Start accepts. Automaton has 34553 states and 56234 transitions. Word has length 126 [2021-11-23 17:37:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:07,864 INFO L470 AbstractCegarLoop]: Abstraction has 34553 states and 56234 transitions. [2021-11-23 17:37:07,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 34553 states and 56234 transitions. [2021-11-23 17:37:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-23 17:37:07,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:07,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:07,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:08,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:37:08,108 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:08,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash 998483907, now seen corresponding path program 1 times [2021-11-23 17:37:08,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:08,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201538765] [2021-11-23 17:37:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:08,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:08,110 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:08,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:37:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:37:08,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:08,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:37:08,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:08,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201538765] [2021-11-23 17:37:08,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201538765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:37:08,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:37:08,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:37:08,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146192019] [2021-11-23 17:37:08,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:37:08,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:37:08,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:37:08,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:37:08,476 INFO L87 Difference]: Start difference. First operand 34553 states and 56234 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:11,056 INFO L93 Difference]: Finished difference Result 72130 states and 117148 transitions. [2021-11-23 17:37:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:37:11,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-23 17:37:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:11,140 INFO L225 Difference]: With dead ends: 72130 [2021-11-23 17:37:11,140 INFO L226 Difference]: Without dead ends: 37858 [2021-11-23 17:37:11,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:37:11,182 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 1340 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:11,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 1077 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:37:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37858 states. [2021-11-23 17:37:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37858 to 35256. [2021-11-23 17:37:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35256 states, 35255 states have (on average 1.6281094880158842) internal successors, (57399), 35255 states have internal predecessors, (57399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35256 states to 35256 states and 57399 transitions. [2021-11-23 17:37:14,072 INFO L78 Accepts]: Start accepts. Automaton has 35256 states and 57399 transitions. Word has length 126 [2021-11-23 17:37:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:14,073 INFO L470 AbstractCegarLoop]: Abstraction has 35256 states and 57399 transitions. [2021-11-23 17:37:14,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 35256 states and 57399 transitions. [2021-11-23 17:37:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 17:37:14,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:14,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:14,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:14,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:37:14,309 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash 360039680, now seen corresponding path program 1 times [2021-11-23 17:37:14,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:14,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338513331] [2021-11-23 17:37:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:14,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:14,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:14,311 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:14,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f05bd47-6946-40c9-bd6c-91c216ad77cd/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:37:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:14,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:37:14,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:14,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:37:14,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:14,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338513331] [2021-11-23 17:37:14,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338513331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:37:14,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:37:14,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:37:14,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278127055] [2021-11-23 17:37:14,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:37:14,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:37:14,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:14,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:37:14,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:37:14,733 INFO L87 Difference]: Start difference. First operand 35256 states and 57399 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:19,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:19,293 INFO L93 Difference]: Finished difference Result 100614 states and 163585 transitions. [2021-11-23 17:37:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:37:19,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-23 17:37:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:19,417 INFO L225 Difference]: With dead ends: 100614 [2021-11-23 17:37:19,417 INFO L226 Difference]: Without dead ends: 68336 [2021-11-23 17:37:19,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:37:19,450 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 388 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:19,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 1508 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:37:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68336 states.