./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.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_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/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_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/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_148e0a9f-df00-4233-8f04-9a4a84fdb525/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 5661dd51a89476ec423182a94520e4ccb4afe3fa5cba3e5cadf7302b2a1362a5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:59:55,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:59:55,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:59:55,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:59:55,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:59:55,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:59:55,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:59:55,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:59:55,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:59:55,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:59:55,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:59:55,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:59:55,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:59:55,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:59:55,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:59:55,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:59:55,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:59:55,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:59:55,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:59:55,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:59:55,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:59:55,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:59:55,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:59:55,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:59:55,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:59:55,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:59:55,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:59:55,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:59:55,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:59:55,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:59:55,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:59:55,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:59:55,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:59:55,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:59:55,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:59:55,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:59:55,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:59:55,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:59:55,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:59:55,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:59:55,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:59:55,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:59:56,043 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:59:56,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:59:56,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:59:56,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:59:56,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:59:56,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:59:56,046 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:59:56,046 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:59:56,047 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:59:56,047 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:59:56,048 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:59:56,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:59:56,048 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:59:56,049 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:59:56,049 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:59:56,049 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:59:56,049 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:59:56,050 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:59:56,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:59:56,051 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:59:56,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:59:56,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:59:56,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:59:56,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:59:56,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:59:56,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:59:56,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:59:56,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:59:56,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:59:56,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:59:56,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:59:56,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:59:56,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:59:56,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:59:56,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:59:56,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:59:56,057 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:59:56,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:59:56,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:59:56,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:59:56,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:59:56,058 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_148e0a9f-df00-4233-8f04-9a4a84fdb525/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5661dd51a89476ec423182a94520e4ccb4afe3fa5cba3e5cadf7302b2a1362a5 [2021-11-23 16:59:56,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:59:56,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:59:56,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:59:56,387 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:59:56,388 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:59:56,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c [2021-11-23 16:59:56,478 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/data/fa72191c5/6c85e3e69b474a24b7a5000c66c5763f/FLAGbcc03ec2e [2021-11-23 16:59:57,322 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:59:57,323 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c [2021-11-23 16:59:57,361 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/data/fa72191c5/6c85e3e69b474a24b7a5000c66c5763f/FLAGbcc03ec2e [2021-11-23 16:59:57,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/data/fa72191c5/6c85e3e69b474a24b7a5000c66c5763f [2021-11-23 16:59:57,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:59:57,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:59:57,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:59:57,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:59:57,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:59:57,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:59:57" (1/1) ... [2021-11-23 16:59:57,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f50792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:57, skipping insertion in model container [2021-11-23 16:59:57,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:59:57" (1/1) ... [2021-11-23 16:59:57,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:59:57,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:59:58,516 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_148e0a9f-df00-4233-8f04-9a4a84fdb525/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c[15510,15523] [2021-11-23 16:59:58,569 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_148e0a9f-df00-4233-8f04-9a4a84fdb525/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c[19017,19030] [2021-11-23 16:59:59,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:59:59,669 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:59:59,741 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_148e0a9f-df00-4233-8f04-9a4a84fdb525/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c[15510,15523] [2021-11-23 16:59:59,749 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_148e0a9f-df00-4233-8f04-9a4a84fdb525/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c[19017,19030] [2021-11-23 17:00:00,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:00:00,363 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:00:00,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00 WrapperNode [2021-11-23 17:00:00,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:00:00,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:00:00,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:00:00,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:00:00,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00" (1/1) ... [2021-11-23 17:00:00,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00" (1/1) ... [2021-11-23 17:00:00,899 INFO L137 Inliner]: procedures = 38, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5147 [2021-11-23 17:00:00,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:00:00,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:00:00,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:00:00,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:00:00,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00" (1/1) ... [2021-11-23 17:00:00,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00" (1/1) ... [2021-11-23 17:00:01,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00" (1/1) ... [2021-11-23 17:00:01,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00" (1/1) ... [2021-11-23 17:00:01,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00" (1/1) ... [2021-11-23 17:00:01,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00" (1/1) ... [2021-11-23 17:00:01,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00" (1/1) ... [2021-11-23 17:00:01,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:00:01,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:00:01,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:00:01,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:00:01,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:00" (1/1) ... [2021-11-23 17:00:01,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:00:01,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:00:01,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:00:01,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:00:01,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:00:01,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:00:01,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:00:01,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:00:01,739 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:00:01,741 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:00:06,310 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:00:06,354 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 17:00:06,359 INFO L158 Benchmark]: Toolchain (without parser) took 8548.29ms. Allocated memory was 98.6MB in the beginning and 505.4MB in the end (delta: 406.8MB). Free memory was 49.9MB in the beginning and 314.0MB in the end (delta: -264.1MB). Peak memory consumption was 296.2MB. Max. memory is 16.1GB. [2021-11-23 17:00:06,360 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory was 53.5MB in the beginning and 53.4MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:00:06,361 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2552.96ms. Allocated memory was 98.6MB in the beginning and 169.9MB in the end (delta: 71.3MB). Free memory was 49.6MB in the beginning and 81.5MB in the end (delta: -31.9MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. [2021-11-23 17:00:06,362 INFO L158 Benchmark]: Boogie Procedure Inliner took 534.85ms. Allocated memory is still 169.9MB. Free memory was 81.5MB in the beginning and 70.7MB in the end (delta: 10.8MB). Peak memory consumption was 59.9MB. Max. memory is 16.1GB. [2021-11-23 17:00:06,362 INFO L158 Benchmark]: Boogie Preprocessor took 604.09ms. Allocated memory was 169.9MB in the beginning and 308.3MB in the end (delta: 138.4MB). Free memory was 70.7MB in the beginning and 181.7MB in the end (delta: -111.0MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2021-11-23 17:00:06,363 INFO L158 Benchmark]: RCFGBuilder took 4850.58ms. Allocated memory was 308.3MB in the beginning and 505.4MB in the end (delta: 197.1MB). Free memory was 181.7MB in the beginning and 314.0MB in the end (delta: -132.3MB). Peak memory consumption was 220.0MB. Max. memory is 16.1GB. [2021-11-23 17:00:06,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory was 53.5MB in the beginning and 53.4MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2552.96ms. Allocated memory was 98.6MB in the beginning and 169.9MB in the end (delta: 71.3MB). Free memory was 49.6MB in the beginning and 81.5MB in the end (delta: -31.9MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 534.85ms. Allocated memory is still 169.9MB. Free memory was 81.5MB in the beginning and 70.7MB in the end (delta: 10.8MB). Peak memory consumption was 59.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 604.09ms. Allocated memory was 169.9MB in the beginning and 308.3MB in the end (delta: 138.4MB). Free memory was 70.7MB in the beginning and 181.7MB in the end (delta: -111.0MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * RCFGBuilder took 4850.58ms. Allocated memory was 308.3MB in the beginning and 505.4MB in the end (delta: 197.1MB). Free memory was 181.7MB in the beginning and 314.0MB in the end (delta: -132.3MB). Peak memory consumption was 220.0MB. 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 17:00:06,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/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_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/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_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/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_148e0a9f-df00-4233-8f04-9a4a84fdb525/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 5661dd51a89476ec423182a94520e4ccb4afe3fa5cba3e5cadf7302b2a1362a5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:00:08,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:00:08,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:00:08,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:00:08,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:00:08,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:00:08,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:00:08,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:00:08,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:00:08,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:00:08,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:00:08,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:00:08,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:00:08,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:00:08,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:00:08,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:00:08,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:00:08,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:00:08,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:00:08,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:00:08,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:00:08,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:00:08,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:00:08,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:00:08,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:00:08,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:00:08,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:00:08,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:00:08,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:00:08,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:00:08,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:00:08,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:00:08,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:00:08,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:00:08,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:00:08,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:00:08,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:00:08,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:00:08,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:00:08,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:00:08,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:00:08,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:00:09,000 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:00:09,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:00:09,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:00:09,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:00:09,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:00:09,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:00:09,004 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:00:09,005 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:00:09,005 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:00:09,005 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:00:09,007 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:00:09,007 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:00:09,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:00:09,009 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:00:09,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:00:09,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:00:09,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:00:09,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:00:09,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:00:09,011 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:00:09,011 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:00:09,011 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:00:09,011 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:00:09,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:00:09,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:00:09,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:00:09,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:00:09,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:00:09,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:00:09,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:00:09,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:00:09,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:00:09,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:00:09,015 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:00:09,015 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:09,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:00:09,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:00:09,016 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:00:09,017 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_148e0a9f-df00-4233-8f04-9a4a84fdb525/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5661dd51a89476ec423182a94520e4ccb4afe3fa5cba3e5cadf7302b2a1362a5 [2021-11-23 17:00:09,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:00:09,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:00:09,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:00:09,445 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:00:09,446 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:00:09,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c [2021-11-23 17:00:09,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/data/e8c8d9a26/8d4f1f7334234dd59c88bc232065300f/FLAG872cb103a [2021-11-23 17:00:10,402 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:00:10,402 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c [2021-11-23 17:00:10,439 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/data/e8c8d9a26/8d4f1f7334234dd59c88bc232065300f/FLAG872cb103a [2021-11-23 17:00:10,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/data/e8c8d9a26/8d4f1f7334234dd59c88bc232065300f [2021-11-23 17:00:10,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:00:10,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:00:10,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:00:10,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:00:10,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:00:10,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:00:10" (1/1) ... [2021-11-23 17:00:10,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2c1b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:10, skipping insertion in model container [2021-11-23 17:00:10,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:00:10" (1/1) ... [2021-11-23 17:00:10,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:00:11,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:00:11,645 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_148e0a9f-df00-4233-8f04-9a4a84fdb525/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c[15510,15523] [2021-11-23 17:00:11,722 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_148e0a9f-df00-4233-8f04-9a4a84fdb525/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c[19017,19030] [2021-11-23 17:00:13,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:00:13,028 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:00:13,063 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_148e0a9f-df00-4233-8f04-9a4a84fdb525/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c[15510,15523] [2021-11-23 17:00:13,069 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_148e0a9f-df00-4233-8f04-9a4a84fdb525/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c[19017,19030] [2021-11-23 17:00:13,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:00:13,884 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:00:13,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13 WrapperNode [2021-11-23 17:00:13,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:00:13,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:00:13,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:00:13,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:00:13,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (1/1) ... [2021-11-23 17:00:13,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (1/1) ... [2021-11-23 17:00:14,293 INFO L137 Inliner]: procedures = 39, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5120 [2021-11-23 17:00:14,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:00:14,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:00:14,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:00:14,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:00:14,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (1/1) ... [2021-11-23 17:00:14,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (1/1) ... [2021-11-23 17:00:14,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (1/1) ... [2021-11-23 17:00:14,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (1/1) ... [2021-11-23 17:00:14,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (1/1) ... [2021-11-23 17:00:14,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (1/1) ... [2021-11-23 17:00:14,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (1/1) ... [2021-11-23 17:00:14,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:00:14,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:00:14,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:00:14,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:00:14,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (1/1) ... [2021-11-23 17:00:14,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:00:14,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:00:14,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:00:14,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:00:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:00:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:00:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:00:14,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:00:14,913 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:00:14,914 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:00:41,678 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:00:41,704 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:00:41,706 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 17:00:41,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:00:41 BoogieIcfgContainer [2021-11-23 17:00:41,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:00:41,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:00:41,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:00:41,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:00:41,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:00:10" (1/3) ... [2021-11-23 17:00:41,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfb3228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:00:41, skipping insertion in model container [2021-11-23 17:00:41,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:00:13" (2/3) ... [2021-11-23 17:00:41,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfb3228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:00:41, skipping insertion in model container [2021-11-23 17:00:41,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:00:41" (3/3) ... [2021-11-23 17:00:41,721 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label08.c [2021-11-23 17:00:41,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:00:41,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 17:00:41,797 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:00:41,804 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 17:00:41,804 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 17:00:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 17:00:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:00:41,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:41,850 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] [2021-11-23 17:00:41,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash -249379731, now seen corresponding path program 1 times [2021-11-23 17:00:41,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:41,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536756518] [2021-11-23 17:00:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:41,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:41,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:41,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:41,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:00:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:41,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:42,157 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 17:00:42,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:42,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:42,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536756518] [2021-11-23 17:00:42,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536756518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:42,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:42,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:00:42,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914316348] [2021-11-23 17:00:42,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:42,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:42,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:42,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:42,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:42,198 INFO L87 Difference]: Start difference. First operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 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 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 17:01:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:17,056 INFO L93 Difference]: Finished difference Result 2563 states and 4924 transitions. [2021-11-23 17:01:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:17,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-11-23 17:01:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:17,085 INFO L225 Difference]: With dead ends: 2563 [2021-11-23 17:01:17,085 INFO L226 Difference]: Without dead ends: 1613 [2021-11-23 17:01:17,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 17:01:17,095 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 989 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:17,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 667 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 34.6s Time] [2021-11-23 17:01:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-11-23 17:01:17,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2021-11-23 17:01:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.6449410304158907) internal successors, (2650), 1612 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 17:01:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2650 transitions. [2021-11-23 17:01:17,230 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2650 transitions. Word has length 30 [2021-11-23 17:01:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:17,231 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 2650 transitions. [2021-11-23 17:01:17,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 17:01:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2650 transitions. [2021-11-23 17:01:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 17:01:17,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:17,234 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] [2021-11-23 17:01:17,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:17,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:17,459 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:17,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:17,460 INFO L85 PathProgramCache]: Analyzing trace with hash -46774319, now seen corresponding path program 1 times [2021-11-23 17:01:17,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:17,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119289857] [2021-11-23 17:01:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:17,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:17,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:17,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:17,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:01:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:17,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:01:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:17,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:17,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:17,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119289857] [2021-11-23 17:01:17,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119289857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:17,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:17,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:01:17,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121846604] [2021-11-23 17:01:17,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:17,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:01:17,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:17,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:01:17,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:17,709 INFO L87 Difference]: Start difference. First operand 1613 states and 2650 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 17:01:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:17,838 INFO L93 Difference]: Finished difference Result 1679 states and 2752 transitions. [2021-11-23 17:01:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:01:17,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-23 17:01:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:17,850 INFO L225 Difference]: With dead ends: 1679 [2021-11-23 17:01:17,850 INFO L226 Difference]: Without dead ends: 1613 [2021-11-23 17:01:17,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:01:17,853 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 3 mSDsluCounter, 4820 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:17,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6441 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:01:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-11-23 17:01:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2021-11-23 17:01:17,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.6201117318435754) internal successors, (2610), 1612 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states 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 17:01:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2610 transitions. [2021-11-23 17:01:17,905 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2610 transitions. Word has length 38 [2021-11-23 17:01:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:17,905 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 2610 transitions. [2021-11-23 17:01:17,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 17:01:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2610 transitions. [2021-11-23 17:01:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:01:17,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:17,909 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] [2021-11-23 17:01:17,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:18,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:18,122 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:18,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:18,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1531755293, now seen corresponding path program 1 times [2021-11-23 17:01:18,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:18,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742958490] [2021-11-23 17:01:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:18,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:18,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:18,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:01:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:18,571 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 17:01:18,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:18,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:18,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742958490] [2021-11-23 17:01:18,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742958490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:18,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:18,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:18,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186087911] [2021-11-23 17:01:18,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:18,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:18,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:18,574 INFO L87 Difference]: Start difference. First operand 1613 states and 2610 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:18,624 INFO L93 Difference]: Finished difference Result 1731 states and 2796 transitions. [2021-11-23 17:01:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 17:01:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:18,636 INFO L225 Difference]: With dead ends: 1731 [2021-11-23 17:01:18,636 INFO L226 Difference]: Without dead ends: 1669 [2021-11-23 17:01:18,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 17:01:18,641 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 1523 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1751 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 17:01:18,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1751 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-11-23 17:01:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1667. [2021-11-23 17:01:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1665 states have (on average 1.6192192192192192) internal successors, (2696), 1666 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states 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 17:01:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2696 transitions. [2021-11-23 17:01:18,704 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2696 transitions. Word has length 77 [2021-11-23 17:01:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:18,705 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2696 transitions. [2021-11-23 17:01:18,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2696 transitions. [2021-11-23 17:01:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:01:18,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:18,710 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] [2021-11-23 17:01:18,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:18,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:18,922 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash 786172563, now seen corresponding path program 1 times [2021-11-23 17:01:18,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:18,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715685505] [2021-11-23 17:01:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:18,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:18,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:18,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:18,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:01:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:19,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:19,296 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 17:01:19,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:19,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715685505] [2021-11-23 17:01:19,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715685505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:19,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:19,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:19,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837420837] [2021-11-23 17:01:19,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:19,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:19,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:19,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:19,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:19,299 INFO L87 Difference]: Start difference. First operand 1667 states and 2696 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:19,348 INFO L93 Difference]: Finished difference Result 1887 states and 3044 transitions. [2021-11-23 17:01:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 17:01:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:19,360 INFO L225 Difference]: With dead ends: 1887 [2021-11-23 17:01:19,361 INFO L226 Difference]: Without dead ends: 1771 [2021-11-23 17:01:19,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 17:01:19,363 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 1519 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1750 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 17:01:19,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 1750 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:19,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-11-23 17:01:19,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2021-11-23 17:01:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1767 states have (on average 1.6168647425014149) internal successors, (2857), 1768 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states 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 17:01:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2857 transitions. [2021-11-23 17:01:19,414 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2857 transitions. Word has length 77 [2021-11-23 17:01:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:19,415 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2857 transitions. [2021-11-23 17:01:19,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2857 transitions. [2021-11-23 17:01:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:01:19,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:19,417 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] [2021-11-23 17:01:19,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:19,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:19,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:19,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1153858295, now seen corresponding path program 1 times [2021-11-23 17:01:19,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:19,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891547995] [2021-11-23 17:01:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:19,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:19,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:19,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:19,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:01:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:19,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:19,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:20,012 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 17:01:20,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:20,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:20,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891547995] [2021-11-23 17:01:20,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891547995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:20,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:20,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:20,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621257745] [2021-11-23 17:01:20,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:20,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:20,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:20,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:20,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:20,015 INFO L87 Difference]: Start difference. First operand 1769 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:20,074 INFO L93 Difference]: Finished difference Result 2181 states and 3507 transitions. [2021-11-23 17:01:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:20,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 17:01:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:20,087 INFO L225 Difference]: With dead ends: 2181 [2021-11-23 17:01:20,087 INFO L226 Difference]: Without dead ends: 1963 [2021-11-23 17:01:20,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 17:01:20,090 INFO L933 BasicCegarLoop]: 1641 mSDtfsCounter, 1515 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 1749 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 17:01:20,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 1749 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-11-23 17:01:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1961. [2021-11-23 17:01:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1959 states have (on average 1.6115364982133742) internal successors, (3157), 1960 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states 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 17:01:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3157 transitions. [2021-11-23 17:01:20,150 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3157 transitions. Word has length 77 [2021-11-23 17:01:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:20,151 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3157 transitions. [2021-11-23 17:01:20,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3157 transitions. [2021-11-23 17:01:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:01:20,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:20,153 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] [2021-11-23 17:01:20,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:20,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:20,366 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:20,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:20,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1546824319, now seen corresponding path program 1 times [2021-11-23 17:01:20,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:20,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998689954] [2021-11-23 17:01:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:20,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:20,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:20,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:20,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:01:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:20,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:20,701 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 17:01:20,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:20,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:20,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998689954] [2021-11-23 17:01:20,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998689954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:20,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:20,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:20,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824485503] [2021-11-23 17:01:20,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:20,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:20,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:20,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:20,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:20,703 INFO L87 Difference]: Start difference. First operand 1961 states and 3157 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:20,775 INFO L93 Difference]: Finished difference Result 2733 states and 4367 transitions. [2021-11-23 17:01:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 17:01:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:20,791 INFO L225 Difference]: With dead ends: 2733 [2021-11-23 17:01:20,792 INFO L226 Difference]: Without dead ends: 2323 [2021-11-23 17:01:20,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 17:01:20,796 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 1511 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1748 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 17:01:20,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1748 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-11-23 17:01:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2321. [2021-11-23 17:01:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2319 states have (on average 1.6011211729193617) internal successors, (3713), 2320 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states 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 17:01:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3713 transitions. [2021-11-23 17:01:20,873 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3713 transitions. Word has length 77 [2021-11-23 17:01:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:20,874 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 3713 transitions. [2021-11-23 17:01:20,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3713 transitions. [2021-11-23 17:01:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:01:20,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:20,876 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] [2021-11-23 17:01:20,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:21,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:21,091 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1884617461, now seen corresponding path program 1 times [2021-11-23 17:01:21,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:21,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409566297] [2021-11-23 17:01:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:21,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:21,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:21,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:21,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:01:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:21,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:21,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:21,425 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 17:01:21,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:21,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:21,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409566297] [2021-11-23 17:01:21,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409566297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:21,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:21,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:21,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400555172] [2021-11-23 17:01:21,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:21,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:21,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:21,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:21,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:21,428 INFO L87 Difference]: Start difference. First operand 2321 states and 3713 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:21,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:21,548 INFO L93 Difference]: Finished difference Result 3765 states and 5955 transitions. [2021-11-23 17:01:21,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:21,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 17:01:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:21,568 INFO L225 Difference]: With dead ends: 3765 [2021-11-23 17:01:21,569 INFO L226 Difference]: Without dead ends: 2995 [2021-11-23 17:01:21,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 17:01:21,572 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 1507 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1747 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 17:01:21,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1747 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-11-23 17:01:21,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2993. [2021-11-23 17:01:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2991 states have (on average 1.583751253761284) internal successors, (4737), 2992 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states 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 17:01:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4737 transitions. [2021-11-23 17:01:21,678 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4737 transitions. Word has length 77 [2021-11-23 17:01:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:21,679 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 4737 transitions. [2021-11-23 17:01:21,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4737 transitions. [2021-11-23 17:01:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:01:21,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:21,685 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] [2021-11-23 17:01:21,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:21,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:21,901 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2001711063, now seen corresponding path program 1 times [2021-11-23 17:01:21,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:21,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245236289] [2021-11-23 17:01:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:21,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:21,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:21,903 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:21,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:01:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:22,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:01:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:23,135 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 17:01:23,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:23,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:23,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245236289] [2021-11-23 17:01:23,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245236289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:23,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:23,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:01:23,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239265244] [2021-11-23 17:01:23,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:23,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:01:23,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:23,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:01:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:01:23,138 INFO L87 Difference]: Start difference. First operand 2993 states and 4737 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:23,319 INFO L93 Difference]: Finished difference Result 4460 states and 6995 transitions. [2021-11-23 17:01:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:01:23,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 17:01:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:23,337 INFO L225 Difference]: With dead ends: 4460 [2021-11-23 17:01:23,338 INFO L226 Difference]: Without dead ends: 3018 [2021-11-23 17:01:23,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:01:23,341 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 2935 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2935 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:23,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2935 Valid, 3147 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2021-11-23 17:01:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-11-23 17:01:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2021-11-23 17:01:23,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3014 states have (on average 1.5812873258128732) internal successors, (4766), 3015 states have internal predecessors, (4766), 0 states have call successors, (0), 0 states 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 17:01:23,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 4766 transitions. [2021-11-23 17:01:23,455 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 4766 transitions. Word has length 77 [2021-11-23 17:01:23,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:23,456 INFO L470 AbstractCegarLoop]: Abstraction has 3016 states and 4766 transitions. [2021-11-23 17:01:23,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:23,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 4766 transitions. [2021-11-23 17:01:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:01:23,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:23,457 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] [2021-11-23 17:01:23,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:23,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:23,677 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1192364437, now seen corresponding path program 1 times [2021-11-23 17:01:23,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:23,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188499680] [2021-11-23 17:01:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:23,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:23,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:23,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:23,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:01:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:01:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:25,793 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 17:01:25,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:25,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:25,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188499680] [2021-11-23 17:01:25,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188499680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:25,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:25,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:01:25,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611883161] [2021-11-23 17:01:25,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:25,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:01:25,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:25,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:01:25,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:01:25,798 INFO L87 Difference]: Start difference. First operand 3016 states and 4766 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:26,514 INFO L93 Difference]: Finished difference Result 13110 states and 20341 transitions. [2021-11-23 17:01:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:01:26,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 17:01:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:26,586 INFO L225 Difference]: With dead ends: 13110 [2021-11-23 17:01:26,586 INFO L226 Difference]: Without dead ends: 11668 [2021-11-23 17:01:26,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:01:26,593 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 5593 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5593 SdHoareTripleChecker+Valid, 2173 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:26,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5593 Valid, 2173 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:01:26,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11668 states. [2021-11-23 17:01:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11668 to 5896. [2021-11-23 17:01:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 5894 states have (on average 1.5469969460468274) internal successors, (9118), 5895 states have internal predecessors, (9118), 0 states have call successors, (0), 0 states 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 17:01:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 9118 transitions. [2021-11-23 17:01:26,934 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 9118 transitions. Word has length 77 [2021-11-23 17:01:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:26,935 INFO L470 AbstractCegarLoop]: Abstraction has 5896 states and 9118 transitions. [2021-11-23 17:01:26,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 17:01:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 9118 transitions. [2021-11-23 17:01:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:01:26,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:26,936 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] [2021-11-23 17:01:26,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:27,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:27,156 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash -521648581, now seen corresponding path program 1 times [2021-11-23 17:01:27,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:27,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322319999] [2021-11-23 17:01:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:27,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:27,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:27,157 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:27,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:01:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:27,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:27,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:27,544 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 17:01:27,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:27,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:27,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322319999] [2021-11-23 17:01:27,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322319999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:27,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:27,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:27,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319248823] [2021-11-23 17:01:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:27,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:27,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:27,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:27,546 INFO L87 Difference]: Start difference. First operand 5896 states and 9118 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 17:01:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:27,946 INFO L93 Difference]: Finished difference Result 14028 states and 21376 transitions. [2021-11-23 17:01:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:27,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 17:01:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:27,968 INFO L225 Difference]: With dead ends: 14028 [2021-11-23 17:01:27,968 INFO L226 Difference]: Without dead ends: 9706 [2021-11-23 17:01:27,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:01:27,977 INFO L933 BasicCegarLoop]: 1581 mSDtfsCounter, 1498 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:27,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1672 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9706 states. [2021-11-23 17:01:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9706 to 9608. [2021-11-23 17:01:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9608 states, 9606 states have (on average 1.5038517593170935) internal successors, (14446), 9607 states have internal predecessors, (14446), 0 states have call successors, (0), 0 states 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 17:01:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9608 states to 9608 states and 14446 transitions. [2021-11-23 17:01:28,452 INFO L78 Accepts]: Start accepts. Automaton has 9608 states and 14446 transitions. Word has length 79 [2021-11-23 17:01:28,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:28,453 INFO L470 AbstractCegarLoop]: Abstraction has 9608 states and 14446 transitions. [2021-11-23 17:01:28,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 17:01:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 9608 states and 14446 transitions. [2021-11-23 17:01:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 17:01:28,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:28,455 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] [2021-11-23 17:01:28,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:28,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:28,669 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1639628201, now seen corresponding path program 1 times [2021-11-23 17:01:28,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:28,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287118846] [2021-11-23 17:01:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:28,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:28,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:28,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:28,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:01:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:28,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:01:28,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:28,914 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 17:01:28,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:28,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:28,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287118846] [2021-11-23 17:01:28,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287118846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:28,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:28,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:01:28,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605678391] [2021-11-23 17:01:28,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:28,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:01:28,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:01:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:28,917 INFO L87 Difference]: Start difference. First operand 9608 states and 14446 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 17:01:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:29,697 INFO L93 Difference]: Finished difference Result 15924 states and 23614 transitions. [2021-11-23 17:01:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:01:29,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 17:01:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:29,732 INFO L225 Difference]: With dead ends: 15924 [2021-11-23 17:01:29,732 INFO L226 Difference]: Without dead ends: 15922 [2021-11-23 17:01:29,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:01:29,737 INFO L933 BasicCegarLoop]: 1633 mSDtfsCounter, 264 mSDsluCounter, 4751 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 6384 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:29,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 6384 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:01:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15922 states. [2021-11-23 17:01:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15922 to 9992. [2021-11-23 17:01:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9992 states, 9990 states have (on average 1.4812812812812812) internal successors, (14798), 9991 states have internal predecessors, (14798), 0 states have call successors, (0), 0 states 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 17:01:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9992 states to 9992 states and 14798 transitions. [2021-11-23 17:01:30,377 INFO L78 Accepts]: Start accepts. Automaton has 9992 states and 14798 transitions. Word has length 80 [2021-11-23 17:01:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:30,377 INFO L470 AbstractCegarLoop]: Abstraction has 9992 states and 14798 transitions. [2021-11-23 17:01:30,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 17:01:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states and 14798 transitions. [2021-11-23 17:01:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 17:01:30,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:30,379 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] [2021-11-23 17:01:30,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:30,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:30,592 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash -316606344, now seen corresponding path program 1 times [2021-11-23 17:01:30,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:30,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643307493] [2021-11-23 17:01:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:30,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:30,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:30,595 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:30,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:01:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:30,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:30,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:30,921 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 17:01:30,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:30,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643307493] [2021-11-23 17:01:30,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643307493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:30,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:30,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:30,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830265205] [2021-11-23 17:01:30,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:30,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:30,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:30,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:30,924 INFO L87 Difference]: Start difference. First operand 9992 states and 14798 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 17:01:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:31,569 INFO L93 Difference]: Finished difference Result 18445 states and 27281 transitions. [2021-11-23 17:01:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:31,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-23 17:01:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:31,601 INFO L225 Difference]: With dead ends: 18445 [2021-11-23 17:01:31,601 INFO L226 Difference]: Without dead ends: 13834 [2021-11-23 17:01:31,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 79 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 17:01:31,611 INFO L933 BasicCegarLoop]: 1660 mSDtfsCounter, 1524 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1756 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 17:01:31,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1756 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13834 states. [2021-11-23 17:01:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13834 to 13832. [2021-11-23 17:01:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13832 states, 13830 states have (on average 1.469052783803326) internal successors, (20317), 13831 states have internal predecessors, (20317), 0 states have call successors, (0), 0 states 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 17:01:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13832 states to 13832 states and 20317 transitions. [2021-11-23 17:01:32,368 INFO L78 Accepts]: Start accepts. Automaton has 13832 states and 20317 transitions. Word has length 81 [2021-11-23 17:01:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:32,368 INFO L470 AbstractCegarLoop]: Abstraction has 13832 states and 20317 transitions. [2021-11-23 17:01:32,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 17:01:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 13832 states and 20317 transitions. [2021-11-23 17:01:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:01:32,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:32,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:01:32,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:32,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:32,585 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:32,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:32,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1726645892, now seen corresponding path program 1 times [2021-11-23 17:01:32,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:32,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542515180] [2021-11-23 17:01:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:32,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:32,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:32,589 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:32,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:01:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:32,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:32,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:01:33,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:33,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:33,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542515180] [2021-11-23 17:01:33,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542515180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:33,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:33,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:01:33,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287670590] [2021-11-23 17:01:33,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:33,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:33,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:33,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:33,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:33,038 INFO L87 Difference]: Start difference. First operand 13832 states and 20317 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:06,394 INFO L93 Difference]: Finished difference Result 16838 states and 25244 transitions. [2021-11-23 17:02:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:06,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-23 17:02:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:06,425 INFO L225 Difference]: With dead ends: 16838 [2021-11-23 17:02:06,425 INFO L226 Difference]: Without dead ends: 15334 [2021-11-23 17:02:06,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 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 17:02:06,432 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 869 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:06,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 619 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 32.7s Time] [2021-11-23 17:02:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15334 states. [2021-11-23 17:02:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15334 to 15334. [2021-11-23 17:02:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15334 states, 15332 states have (on average 1.443842942864597) internal successors, (22137), 15333 states have internal predecessors, (22137), 0 states have call successors, (0), 0 states 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 17:02:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15334 states to 15334 states and 22137 transitions. [2021-11-23 17:02:07,267 INFO L78 Accepts]: Start accepts. Automaton has 15334 states and 22137 transitions. Word has length 101 [2021-11-23 17:02:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:07,268 INFO L470 AbstractCegarLoop]: Abstraction has 15334 states and 22137 transitions. [2021-11-23 17:02:07,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 15334 states and 22137 transitions. [2021-11-23 17:02:07,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 17:02:07,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:07,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:02:07,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:07,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:07,487 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1190900870, now seen corresponding path program 1 times [2021-11-23 17:02:07,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:07,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267217286] [2021-11-23 17:02:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:07,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:07,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:07,490 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:07,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:02:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:07,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:02:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:07,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:07,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:07,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267217286] [2021-11-23 17:02:07,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267217286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:07,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:07,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:02:07,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962114675] [2021-11-23 17:02:07,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:07,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:07,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:02:07,962 INFO L87 Difference]: Start difference. First operand 15334 states and 22137 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 17:02:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:49,648 INFO L93 Difference]: Finished difference Result 21346 states and 30705 transitions. [2021-11-23 17:02:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:49,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-23 17:02:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:49,683 INFO L225 Difference]: With dead ends: 21346 [2021-11-23 17:02:49,684 INFO L226 Difference]: Without dead ends: 18340 [2021-11-23 17:02:49,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 103 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 17:02:49,693 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 1059 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:49,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 727 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 41.1s Time] [2021-11-23 17:02:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18340 states. [2021-11-23 17:02:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18340 to 18338. [2021-11-23 17:02:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18338 states, 18336 states have (on average 1.4091404886561956) internal successors, (25838), 18337 states have internal predecessors, (25838), 0 states have call successors, (0), 0 states 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 17:02:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18338 states to 18338 states and 25838 transitions. [2021-11-23 17:02:50,532 INFO L78 Accepts]: Start accepts. Automaton has 18338 states and 25838 transitions. Word has length 105 [2021-11-23 17:02:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:50,532 INFO L470 AbstractCegarLoop]: Abstraction has 18338 states and 25838 transitions. [2021-11-23 17:02:50,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 17:02:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 18338 states and 25838 transitions. [2021-11-23 17:02:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:02:50,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:50,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:02:50,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:50,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:50,755 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1561529476, now seen corresponding path program 1 times [2021-11-23 17:02:50,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:50,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628603066] [2021-11-23 17:02:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:50,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:50,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:50,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:02:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:50,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:02:50,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:51,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:51,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:51,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628603066] [2021-11-23 17:02:51,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628603066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:51,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:51,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:02:51,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373333482] [2021-11-23 17:02:51,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:51,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:51,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:51,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:51,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:02:51,075 INFO L87 Difference]: Start difference. First operand 18338 states and 25838 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 17:02:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:51,477 INFO L93 Difference]: Finished difference Result 26823 states and 38263 transitions. [2021-11-23 17:02:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:51,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-11-23 17:02:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:51,499 INFO L225 Difference]: With dead ends: 26823 [2021-11-23 17:02:51,499 INFO L226 Difference]: Without dead ends: 14565 [2021-11-23 17:02:51,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 110 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 17:02:51,516 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 63 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 3198 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:51,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 3198 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:02:51,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14565 states. [2021-11-23 17:02:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14565 to 14563. [2021-11-23 17:02:52,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14563 states, 14561 states have (on average 1.4001785591648925) internal successors, (20388), 14562 states have internal predecessors, (20388), 0 states have call successors, (0), 0 states 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 17:02:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14563 states to 14563 states and 20388 transitions. [2021-11-23 17:02:52,121 INFO L78 Accepts]: Start accepts. Automaton has 14563 states and 20388 transitions. Word has length 112 [2021-11-23 17:02:52,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:52,121 INFO L470 AbstractCegarLoop]: Abstraction has 14563 states and 20388 transitions. [2021-11-23 17:02:52,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 17:02:52,121 INFO L276 IsEmpty]: Start isEmpty. Operand 14563 states and 20388 transitions. [2021-11-23 17:02:52,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 17:02:52,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:52,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:02:52,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:52,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:52,340 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:52,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:52,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1473444159, now seen corresponding path program 1 times [2021-11-23 17:02:52,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:52,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185614428] [2021-11-23 17:02:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:52,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:52,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:52,342 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:52,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:02:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:02:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:53,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:55,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:55,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185614428] [2021-11-23 17:02:55,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185614428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:55,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [277412455] [2021-11-23 17:02:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:55,446 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:55,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:02:55,453 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:02:55,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:02:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:55,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:02:55,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:57,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:58,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [277412455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440725043] [2021-11-23 17:02:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:58,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:02:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:02:58,218 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:02:58,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:02:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:02:58,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:59,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:00,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440725043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:00,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:00,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:03:00,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658429929] [2021-11-23 17:03:00,720 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:00,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:03:00,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:03:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:03:00,722 INFO L87 Difference]: Start difference. First operand 14563 states and 20388 transitions. Second operand has 16 states, 16 states have (on average 12.4375) internal successors, (199), 15 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 17:03:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:01,481 INFO L93 Difference]: Finished difference Result 23028 states and 32693 transitions. [2021-11-23 17:03:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:03:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.4375) internal successors, (199), 15 states have internal predecessors, (199), 0 states have call successors, (0), 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 114 [2021-11-23 17:03:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:01,496 INFO L225 Difference]: With dead ends: 23028 [2021-11-23 17:03:01,496 INFO L226 Difference]: Without dead ends: 14578 [2021-11-23 17:03:01,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:03:01,503 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 5858 mSDsluCounter, 9587 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5858 SdHoareTripleChecker+Valid, 11146 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:01,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5858 Valid, 11146 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2021-11-23 17:03:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14578 states. [2021-11-23 17:03:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14578 to 14578. [2021-11-23 17:03:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14578 states, 14576 states have (on average 1.3997667398463227) internal successors, (20403), 14577 states have internal predecessors, (20403), 0 states have call successors, (0), 0 states 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 17:03:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 20403 transitions. [2021-11-23 17:03:01,921 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 20403 transitions. Word has length 114 [2021-11-23 17:03:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:01,921 INFO L470 AbstractCegarLoop]: Abstraction has 14578 states and 20403 transitions. [2021-11-23 17:03:01,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.4375) internal successors, (199), 15 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 17:03:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 20403 transitions. [2021-11-23 17:03:01,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 17:03:01,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:01,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:01,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:02,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:02,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 17:03:02,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:02,541 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:02,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1037894815, now seen corresponding path program 1 times [2021-11-23 17:03:02,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:02,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428669977] [2021-11-23 17:03:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:02,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:02,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:02,543 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:02,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:03:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:02,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:02,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:04,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:05,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:05,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428669977] [2021-11-23 17:03:05,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428669977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:05,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [121422778] [2021-11-23 17:03:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:05,414 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:05,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:05,421 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:05,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:03:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:05,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:05,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:07,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:08,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [121422778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:08,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132608866] [2021-11-23 17:03:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:08,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:08,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:08,129 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:08,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 17:03:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:08,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:10,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:11,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132608866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:11,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:11,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:03:11,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619044267] [2021-11-23 17:03:11,003 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:11,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:03:11,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:11,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:03:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:03:11,006 INFO L87 Difference]: Start difference. First operand 14578 states and 20403 transitions. Second operand has 16 states, 16 states have (on average 12.8125) internal successors, (205), 15 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 17:03:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:11,637 INFO L93 Difference]: Finished difference Result 23048 states and 32724 transitions. [2021-11-23 17:03:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:03:11,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.8125) internal successors, (205), 15 states have internal predecessors, (205), 0 states have call successors, (0), 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 114 [2021-11-23 17:03:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:11,660 INFO L225 Difference]: With dead ends: 23048 [2021-11-23 17:03:11,660 INFO L226 Difference]: Without dead ends: 14598 [2021-11-23 17:03:11,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:03:11,670 INFO L933 BasicCegarLoop]: 1566 mSDtfsCounter, 5906 mSDsluCounter, 10916 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5906 SdHoareTripleChecker+Valid, 12482 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:11,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5906 Valid, 12482 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2021-11-23 17:03:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14598 states. [2021-11-23 17:03:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14598 to 14588. [2021-11-23 17:03:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14588 states, 14586 states have (on average 1.3997668997668997) internal successors, (20417), 14587 states have internal predecessors, (20417), 0 states have call successors, (0), 0 states 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 17:03:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14588 states to 14588 states and 20417 transitions. [2021-11-23 17:03:12,172 INFO L78 Accepts]: Start accepts. Automaton has 14588 states and 20417 transitions. Word has length 114 [2021-11-23 17:03:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:12,172 INFO L470 AbstractCegarLoop]: Abstraction has 14588 states and 20417 transitions. [2021-11-23 17:03:12,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.8125) internal successors, (205), 15 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 17:03:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 14588 states and 20417 transitions. [2021-11-23 17:03:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 17:03:12,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:12,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:12,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:12,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:12,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:12,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:12,783 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:12,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:12,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1783477545, now seen corresponding path program 1 times [2021-11-23 17:03:12,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:12,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295279574] [2021-11-23 17:03:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:12,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:12,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:12,785 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:12,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:03:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:12,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:12,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:13,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:13,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:13,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295279574] [2021-11-23 17:03:13,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295279574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:13,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:13,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:13,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409573460] [2021-11-23 17:03:13,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:13,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:13,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:13,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:13,191 INFO L87 Difference]: Start difference. First operand 14588 states and 20417 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:13,397 INFO L93 Difference]: Finished difference Result 18816 states and 26563 transitions. [2021-11-23 17:03:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:13,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-23 17:03:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:13,407 INFO L225 Difference]: With dead ends: 18816 [2021-11-23 17:03:13,408 INFO L226 Difference]: Without dead ends: 10366 [2021-11-23 17:03:13,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 112 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 17:03:13,416 INFO L933 BasicCegarLoop]: 1624 mSDtfsCounter, 55 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 3183 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:13,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 3183 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:03:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10366 states. [2021-11-23 17:03:13,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10366 to 10364. [2021-11-23 17:03:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10364 states, 10362 states have (on average 1.372611464968153) internal successors, (14223), 10363 states have internal predecessors, (14223), 0 states have call successors, (0), 0 states 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 17:03:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10364 states to 10364 states and 14223 transitions. [2021-11-23 17:03:13,715 INFO L78 Accepts]: Start accepts. Automaton has 10364 states and 14223 transitions. Word has length 114 [2021-11-23 17:03:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:13,716 INFO L470 AbstractCegarLoop]: Abstraction has 10364 states and 14223 transitions. [2021-11-23 17:03:13,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 10364 states and 14223 transitions. [2021-11-23 17:03:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 17:03:13,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:13,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:13,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:13,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:13,932 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash -595476539, now seen corresponding path program 1 times [2021-11-23 17:03:13,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:13,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127188834] [2021-11-23 17:03:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:13,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:13,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:13,935 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:13,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:03:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:14,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:03:14,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:14,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127188834] [2021-11-23 17:03:14,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127188834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:14,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:14,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:03:14,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695555953] [2021-11-23 17:03:14,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:14,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:03:14,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:14,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:03:14,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:03:14,917 INFO L87 Difference]: Start difference. First operand 10364 states and 14223 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 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 17:03:15,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:15,162 INFO L93 Difference]: Finished difference Result 14607 states and 20338 transitions. [2021-11-23 17:03:15,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:03:15,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 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 114 [2021-11-23 17:03:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:15,177 INFO L225 Difference]: With dead ends: 14607 [2021-11-23 17:03:15,177 INFO L226 Difference]: Without dead ends: 10364 [2021-11-23 17:03:15,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:15,183 INFO L933 BasicCegarLoop]: 1566 mSDtfsCounter, 2929 mSDsluCounter, 3094 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2929 SdHoareTripleChecker+Valid, 4660 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:15,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2929 Valid, 4660 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2021-11-23 17:03:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10364 states. [2021-11-23 17:03:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10364 to 10364. [2021-11-23 17:03:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10364 states, 10362 states have (on average 1.3725149585022196) internal successors, (14222), 10363 states have internal predecessors, (14222), 0 states have call successors, (0), 0 states 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 17:03:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10364 states to 10364 states and 14222 transitions. [2021-11-23 17:03:15,405 INFO L78 Accepts]: Start accepts. Automaton has 10364 states and 14222 transitions. Word has length 114 [2021-11-23 17:03:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:15,405 INFO L470 AbstractCegarLoop]: Abstraction has 10364 states and 14222 transitions. [2021-11-23 17:03:15,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 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 17:03:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 10364 states and 14222 transitions. [2021-11-23 17:03:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 17:03:15,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:15,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:15,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:15,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:15,609 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash -136057147, now seen corresponding path program 1 times [2021-11-23 17:03:15,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:15,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893845043] [2021-11-23 17:03:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:15,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:15,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:15,611 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:15,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:03:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:15,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:15,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:03:16,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:16,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:16,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893845043] [2021-11-23 17:03:16,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893845043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:16,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:16,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:03:16,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473850516] [2021-11-23 17:03:16,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:16,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:03:16,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:16,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:03:16,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:03:16,590 INFO L87 Difference]: Start difference. First operand 10364 states and 14222 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 17:03:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:16,844 INFO L93 Difference]: Finished difference Result 14611 states and 20342 transitions. [2021-11-23 17:03:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:03:16,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 114 [2021-11-23 17:03:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:16,854 INFO L225 Difference]: With dead ends: 14611 [2021-11-23 17:03:16,854 INFO L226 Difference]: Without dead ends: 10364 [2021-11-23 17:03:16,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:16,859 INFO L933 BasicCegarLoop]: 1569 mSDtfsCounter, 2925 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2925 SdHoareTripleChecker+Valid, 3200 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:16,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2925 Valid, 3200 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 47 Unchecked, 0.0s Time] [2021-11-23 17:03:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10364 states. [2021-11-23 17:03:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10364 to 10364. [2021-11-23 17:03:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10364 states, 10362 states have (on average 1.3724184520362865) internal successors, (14221), 10363 states have internal predecessors, (14221), 0 states have call successors, (0), 0 states 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 17:03:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10364 states to 10364 states and 14221 transitions. [2021-11-23 17:03:17,086 INFO L78 Accepts]: Start accepts. Automaton has 10364 states and 14221 transitions. Word has length 114 [2021-11-23 17:03:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:17,087 INFO L470 AbstractCegarLoop]: Abstraction has 10364 states and 14221 transitions. [2021-11-23 17:03:17,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 17:03:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 10364 states and 14221 transitions. [2021-11-23 17:03:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 17:03:17,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:17,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:17,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:17,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:17,290 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:17,290 INFO L85 PathProgramCache]: Analyzing trace with hash 680959429, now seen corresponding path program 1 times [2021-11-23 17:03:17,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:17,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658981790] [2021-11-23 17:03:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:17,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:17,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:17,293 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:17,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:03:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:17,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:03:18,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:18,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:18,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658981790] [2021-11-23 17:03:18,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658981790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:18,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:18,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:03:18,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217266263] [2021-11-23 17:03:18,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:18,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:03:18,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:03:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:03:18,179 INFO L87 Difference]: Start difference. First operand 10364 states and 14221 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 17:03:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:18,507 INFO L93 Difference]: Finished difference Result 14615 states and 20346 transitions. [2021-11-23 17:03:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:03:18,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 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 114 [2021-11-23 17:03:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:18,517 INFO L225 Difference]: With dead ends: 14615 [2021-11-23 17:03:18,517 INFO L226 Difference]: Without dead ends: 10364 [2021-11-23 17:03:18,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:18,522 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 1477 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 3251 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:18,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 3251 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-11-23 17:03:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10364 states. [2021-11-23 17:03:18,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10364 to 10364. [2021-11-23 17:03:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10364 states, 10362 states have (on average 1.3723219455703533) internal successors, (14220), 10363 states have internal predecessors, (14220), 0 states have call successors, (0), 0 states 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 17:03:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10364 states to 10364 states and 14220 transitions. [2021-11-23 17:03:18,807 INFO L78 Accepts]: Start accepts. Automaton has 10364 states and 14220 transitions. Word has length 114 [2021-11-23 17:03:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:18,808 INFO L470 AbstractCegarLoop]: Abstraction has 10364 states and 14220 transitions. [2021-11-23 17:03:18,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 17:03:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 10364 states and 14220 transitions. [2021-11-23 17:03:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 17:03:18,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:18,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:18,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:19,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:19,014 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:19,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1381616837, now seen corresponding path program 1 times [2021-11-23 17:03:19,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:19,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811356243] [2021-11-23 17:03:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:19,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:19,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:19,016 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:19,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 17:03:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:19,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:19,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:03:19,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:19,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811356243] [2021-11-23 17:03:19,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811356243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:19,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:19,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:03:19,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571779718] [2021-11-23 17:03:19,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:19,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:03:19,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:19,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:03:19,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:03:19,954 INFO L87 Difference]: Start difference. First operand 10364 states and 14220 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 17:03:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:20,236 INFO L93 Difference]: Finished difference Result 14619 states and 20350 transitions. [2021-11-23 17:03:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:03:20,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 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 114 [2021-11-23 17:03:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:20,250 INFO L225 Difference]: With dead ends: 14619 [2021-11-23 17:03:20,250 INFO L226 Difference]: Without dead ends: 10364 [2021-11-23 17:03:20,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:20,255 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 2938 mSDsluCounter, 3067 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2938 SdHoareTripleChecker+Valid, 4642 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:20,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2938 Valid, 4642 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2021-11-23 17:03:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10364 states. [2021-11-23 17:03:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10364 to 10364. [2021-11-23 17:03:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10364 states, 10362 states have (on average 1.37222543910442) internal successors, (14219), 10363 states have internal predecessors, (14219), 0 states have call successors, (0), 0 states 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 17:03:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10364 states to 10364 states and 14219 transitions. [2021-11-23 17:03:20,550 INFO L78 Accepts]: Start accepts. Automaton has 10364 states and 14219 transitions. Word has length 114 [2021-11-23 17:03:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:20,551 INFO L470 AbstractCegarLoop]: Abstraction has 10364 states and 14219 transitions. [2021-11-23 17:03:20,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 17:03:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 10364 states and 14219 transitions. [2021-11-23 17:03:20,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 17:03:20,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:20,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:20,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:20,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:20,757 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:20,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:20,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2028829637, now seen corresponding path program 1 times [2021-11-23 17:03:20,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:20,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037004905] [2021-11-23 17:03:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:20,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:20,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:20,759 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:20,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:03:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:20,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:03:21,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:21,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:21,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037004905] [2021-11-23 17:03:21,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037004905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:21,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:21,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:03:21,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742933417] [2021-11-23 17:03:21,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:21,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:03:21,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:21,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:03:21,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:03:21,582 INFO L87 Difference]: Start difference. First operand 10364 states and 14219 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 17:03:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:21,878 INFO L93 Difference]: Finished difference Result 14590 states and 20316 transitions. [2021-11-23 17:03:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:03:21,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 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 114 [2021-11-23 17:03:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:21,888 INFO L225 Difference]: With dead ends: 14590 [2021-11-23 17:03:21,888 INFO L226 Difference]: Without dead ends: 10331 [2021-11-23 17:03:21,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:21,893 INFO L933 BasicCegarLoop]: 1578 mSDtfsCounter, 1481 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 4750 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:21,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 4750 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2021-11-23 17:03:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-11-23 17:03:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 10331. [2021-11-23 17:03:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10331 states, 10329 states have (on average 1.3728337689999033) internal successors, (14180), 10330 states have internal predecessors, (14180), 0 states have call successors, (0), 0 states 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 17:03:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10331 states to 10331 states and 14180 transitions. [2021-11-23 17:03:22,114 INFO L78 Accepts]: Start accepts. Automaton has 10331 states and 14180 transitions. Word has length 114 [2021-11-23 17:03:22,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:22,115 INFO L470 AbstractCegarLoop]: Abstraction has 10331 states and 14180 transitions. [2021-11-23 17:03:22,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 17:03:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 10331 states and 14180 transitions. [2021-11-23 17:03:22,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 17:03:22,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:22,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:22,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:22,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:22,317 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:22,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:22,318 INFO L85 PathProgramCache]: Analyzing trace with hash -941510808, now seen corresponding path program 1 times [2021-11-23 17:03:22,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:22,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65028731] [2021-11-23 17:03:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:22,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:22,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:22,320 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:22,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:03:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:22,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:22,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:24,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:25,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:25,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65028731] [2021-11-23 17:03:25,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65028731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:25,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1792417670] [2021-11-23 17:03:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:25,400 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:25,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:25,403 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:25,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-23 17:03:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:25,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:25,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:27,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:28,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1792417670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612048855] [2021-11-23 17:03:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:28,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:28,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:28,516 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:28,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 17:03:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:28,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:28,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:31,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:31,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612048855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:31,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:31,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:03:31,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920327931] [2021-11-23 17:03:31,686 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:31,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:03:31,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:03:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:03:31,688 INFO L87 Difference]: Start difference. First operand 10331 states and 14180 transitions. Second operand has 16 states, 16 states have (on average 13.1875) internal successors, (211), 15 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 17:03:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:32,227 INFO L93 Difference]: Finished difference Result 14571 states and 20301 transitions. [2021-11-23 17:03:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:03:32,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.1875) internal successors, (211), 15 states have internal predecessors, (211), 0 states have call successors, (0), 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 17:03:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:32,237 INFO L225 Difference]: With dead ends: 14571 [2021-11-23 17:03:32,237 INFO L226 Difference]: Without dead ends: 10345 [2021-11-23 17:03:32,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:03:32,242 INFO L933 BasicCegarLoop]: 1560 mSDtfsCounter, 4459 mSDsluCounter, 12416 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4459 SdHoareTripleChecker+Valid, 13976 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:32,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4459 Valid, 13976 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2021-11-23 17:03:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10345 states. [2021-11-23 17:03:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10345 to 10343. [2021-11-23 17:03:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10341 states have (on average 1.3729813364278116) internal successors, (14198), 10342 states have internal predecessors, (14198), 0 states have call successors, (0), 0 states 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 17:03:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 14198 transitions. [2021-11-23 17:03:32,462 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 14198 transitions. Word has length 115 [2021-11-23 17:03:32,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:32,462 INFO L470 AbstractCegarLoop]: Abstraction has 10343 states and 14198 transitions. [2021-11-23 17:03:32,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.1875) internal successors, (211), 15 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 17:03:32,462 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 14198 transitions. [2021-11-23 17:03:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 17:03:32,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:32,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:32,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:32,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-23 17:03:32,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:33,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:33,065 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:33,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1413425630, now seen corresponding path program 1 times [2021-11-23 17:03:33,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:33,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341890065] [2021-11-23 17:03:33,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:33,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:33,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:33,067 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:33,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:03:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:33,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:33,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:33,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:33,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:33,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341890065] [2021-11-23 17:03:33,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341890065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:33,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:33,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:33,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574698437] [2021-11-23 17:03:33,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:33,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:33,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:33,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:33,395 INFO L87 Difference]: Start difference. First operand 10343 states and 14198 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 17:03:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:33,561 INFO L93 Difference]: Finished difference Result 12459 states and 17248 transitions. [2021-11-23 17:03:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:33,561 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 17:03:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:33,569 INFO L225 Difference]: With dead ends: 12459 [2021-11-23 17:03:33,569 INFO L226 Difference]: Without dead ends: 8233 [2021-11-23 17:03:33,573 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 17:03:33,574 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 50 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:33,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 3171 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:03:33,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2021-11-23 17:03:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 8231. [2021-11-23 17:03:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8231 states, 8229 states have (on average 1.3518045935107545) internal successors, (11124), 8230 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states 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 17:03:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8231 states to 8231 states and 11124 transitions. [2021-11-23 17:03:33,728 INFO L78 Accepts]: Start accepts. Automaton has 8231 states and 11124 transitions. Word has length 115 [2021-11-23 17:03:33,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:33,728 INFO L470 AbstractCegarLoop]: Abstraction has 8231 states and 11124 transitions. [2021-11-23 17:03:33,728 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 17:03:33,728 INFO L276 IsEmpty]: Start isEmpty. Operand 8231 states and 11124 transitions. [2021-11-23 17:03:33,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 17:03:33,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:33,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:33,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:33,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:33,930 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:33,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:33,931 INFO L85 PathProgramCache]: Analyzing trace with hash 750804472, now seen corresponding path program 1 times [2021-11-23 17:03:33,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:33,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335581368] [2021-11-23 17:03:33,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:33,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:33,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:33,932 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:33,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:03:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:34,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:34,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:36,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:36,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:36,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335581368] [2021-11-23 17:03:36,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335581368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:36,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1165723342] [2021-11-23 17:03:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:36,988 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:36,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:36,989 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:36,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 17:03:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:37,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:37,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:39,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:40,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1165723342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:40,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534507441] [2021-11-23 17:03:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:40,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:40,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:40,241 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:40,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 17:03:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:40,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:40,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:42,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:43,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534507441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:43,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:43,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:03:43,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011799778] [2021-11-23 17:03:43,387 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:43,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:03:43,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:43,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:03:43,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:03:43,389 INFO L87 Difference]: Start difference. First operand 8231 states and 11124 transitions. Second operand has 16 states, 16 states have (on average 13.5625) internal successors, (217), 15 states have internal predecessors, (217), 0 states have call successors, (0), 0 states 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 17:03:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:43,797 INFO L93 Difference]: Finished difference Result 10359 states and 14173 transitions. [2021-11-23 17:03:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:03:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.5625) internal successors, (217), 15 states have internal predecessors, (217), 0 states have call successors, (0), 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 116 [2021-11-23 17:03:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:43,806 INFO L225 Difference]: With dead ends: 10359 [2021-11-23 17:03:43,806 INFO L226 Difference]: Without dead ends: 8245 [2021-11-23 17:03:43,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:03:43,810 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 5885 mSDsluCounter, 10954 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5885 SdHoareTripleChecker+Valid, 12512 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:43,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5885 Valid, 12512 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2021-11-23 17:03:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8245 states. [2021-11-23 17:03:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8245 to 8243. [2021-11-23 17:03:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8243 states, 8241 states have (on average 1.3520203858755004) internal successors, (11142), 8242 states have internal predecessors, (11142), 0 states have call successors, (0), 0 states 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 17:03:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 11142 transitions. [2021-11-23 17:03:43,965 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 11142 transitions. Word has length 116 [2021-11-23 17:03:43,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:43,965 INFO L470 AbstractCegarLoop]: Abstraction has 8243 states and 11142 transitions. [2021-11-23 17:03:43,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.5625) internal successors, (217), 15 states have internal predecessors, (217), 0 states have call successors, (0), 0 states 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 17:03:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 11142 transitions. [2021-11-23 17:03:43,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 17:03:43,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:43,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:43,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:44,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:44,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:44,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:44,568 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash -843480210, now seen corresponding path program 1 times [2021-11-23 17:03:44,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:44,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182579054] [2021-11-23 17:03:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:44,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:44,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:44,569 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:44,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 17:03:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:44,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:44,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:44,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:44,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182579054] [2021-11-23 17:03:44,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182579054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:44,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:44,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:44,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664901001] [2021-11-23 17:03:44,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:44,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:44,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:44,928 INFO L87 Difference]: Start difference. First operand 8243 states and 11142 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:03:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:45,018 INFO L93 Difference]: Finished difference Result 9303 states and 12656 transitions. [2021-11-23 17:03:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:45,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-11-23 17:03:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:45,026 INFO L225 Difference]: With dead ends: 9303 [2021-11-23 17:03:45,026 INFO L226 Difference]: Without dead ends: 7189 [2021-11-23 17:03:45,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 114 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 17:03:45,029 INFO L933 BasicCegarLoop]: 1612 mSDtfsCounter, 45 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3155 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:45,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 3155 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:03:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7189 states. [2021-11-23 17:03:45,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7189 to 7187. [2021-11-23 17:03:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7187 states, 7185 states have (on average 1.3383437717466946) internal successors, (9616), 7186 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states 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 17:03:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7187 states to 7187 states and 9616 transitions. [2021-11-23 17:03:45,148 INFO L78 Accepts]: Start accepts. Automaton has 7187 states and 9616 transitions. Word has length 116 [2021-11-23 17:03:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:45,148 INFO L470 AbstractCegarLoop]: Abstraction has 7187 states and 9616 transitions. [2021-11-23 17:03:45,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:03:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7187 states and 9616 transitions. [2021-11-23 17:03:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:03:45,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:45,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:45,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:45,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:45,353 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:45,353 INFO L85 PathProgramCache]: Analyzing trace with hash 782882463, now seen corresponding path program 1 times [2021-11-23 17:03:45,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:45,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632773319] [2021-11-23 17:03:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:45,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:45,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:45,355 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:45,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 17:03:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:45,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:47,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:48,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:48,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632773319] [2021-11-23 17:03:48,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632773319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:48,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [221734967] [2021-11-23 17:03:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:48,469 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:48,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:48,470 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:48,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 17:03:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:48,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:50,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:51,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [221734967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:51,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273314994] [2021-11-23 17:03:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:51,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:51,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:51,590 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:51,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 17:03:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:54,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:55,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273314994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:55,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:55,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:03:55,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695737707] [2021-11-23 17:03:55,072 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:55,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:03:55,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:55,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:03:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:03:55,074 INFO L87 Difference]: Start difference. First operand 7187 states and 9616 transitions. Second operand has 16 states, 16 states have (on average 13.9375) internal successors, (223), 15 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 17:03:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:55,455 INFO L93 Difference]: Finished difference Result 8259 states and 11141 transitions. [2021-11-23 17:03:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:03:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.9375) internal successors, (223), 15 states have internal predecessors, (223), 0 states have call successors, (0), 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 17:03:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:55,463 INFO L225 Difference]: With dead ends: 8259 [2021-11-23 17:03:55,463 INFO L226 Difference]: Without dead ends: 7201 [2021-11-23 17:03:55,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:03:55,466 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 5895 mSDsluCounter, 9650 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5895 SdHoareTripleChecker+Valid, 11206 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:55,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5895 Valid, 11206 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2021-11-23 17:03:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2021-11-23 17:03:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 7199. [2021-11-23 17:03:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7199 states, 7197 states have (on average 1.338613311101848) internal successors, (9634), 7198 states have internal predecessors, (9634), 0 states have call successors, (0), 0 states 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 17:03:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 9634 transitions. [2021-11-23 17:03:55,584 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 9634 transitions. Word has length 117 [2021-11-23 17:03:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:55,584 INFO L470 AbstractCegarLoop]: Abstraction has 7199 states and 9634 transitions. [2021-11-23 17:03:55,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.9375) internal successors, (223), 15 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 17:03:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 9634 transitions. [2021-11-23 17:03:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:03:55,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:55,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:55,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:55,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:56,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:56,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:56,188 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:56,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1120675605, now seen corresponding path program 1 times [2021-11-23 17:03:56,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:56,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360667340] [2021-11-23 17:03:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:56,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:56,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:56,189 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:56,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 17:03:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:56,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:56,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:56,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360667340] [2021-11-23 17:03:56,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360667340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:56,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:56,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:56,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013110323] [2021-11-23 17:03:56,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:56,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:56,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:56,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:56,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:56,500 INFO L87 Difference]: Start difference. First operand 7199 states and 9634 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 17:03:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:56,564 INFO L93 Difference]: Finished difference Result 7731 states and 10386 transitions. [2021-11-23 17:03:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:56,565 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 17:03:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:56,572 INFO L225 Difference]: With dead ends: 7731 [2021-11-23 17:03:56,572 INFO L226 Difference]: Without dead ends: 6673 [2021-11-23 17:03:56,574 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 17:03:56,575 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 40 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:56,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3139 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:03:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2021-11-23 17:03:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 6671. [2021-11-23 17:03:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6669 states have (on average 1.3309341730394362) internal successors, (8876), 6670 states have internal predecessors, (8876), 0 states have call successors, (0), 0 states 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 17:03:56,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 8876 transitions. [2021-11-23 17:03:56,676 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 8876 transitions. Word has length 117 [2021-11-23 17:03:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:56,676 INFO L470 AbstractCegarLoop]: Abstraction has 6671 states and 8876 transitions. [2021-11-23 17:03:56,676 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 17:03:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 8876 transitions. [2021-11-23 17:03:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:03:56,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:56,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:56,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:56,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:56,878 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:56,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1473444751, now seen corresponding path program 1 times [2021-11-23 17:03:56,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:56,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450458597] [2021-11-23 17:03:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:56,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:56,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:56,880 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:56,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 17:03:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:56,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:59,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:00,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450458597] [2021-11-23 17:04:00,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450458597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:00,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [333321036] [2021-11-23 17:04:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:00,139 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:00,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:04:00,140 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:04:00,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-23 17:04:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:00,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:04:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:02,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:03,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [333321036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:03,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114379842] [2021-11-23 17:04:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:03,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:04:03,172 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:04:03,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 17:04:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:03,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:04:03,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:05,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:06,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114379842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:06,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:04:06,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:04:06,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865550706] [2021-11-23 17:04:06,527 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:04:06,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:04:06,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:04:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:04:06,529 INFO L87 Difference]: Start difference. First operand 6671 states and 8876 transitions. Second operand has 16 states, 16 states have (on average 14.3125) internal successors, (229), 15 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 17:04:06,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:06,963 INFO L93 Difference]: Finished difference Result 7372 states and 9855 transitions. [2021-11-23 17:04:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:04:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.3125) internal successors, (229), 15 states have internal predecessors, (229), 0 states have call successors, (0), 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 17:04:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:06,970 INFO L225 Difference]: With dead ends: 7372 [2021-11-23 17:04:06,970 INFO L226 Difference]: Without dead ends: 6842 [2021-11-23 17:04:06,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:04:06,973 INFO L933 BasicCegarLoop]: 1586 mSDtfsCounter, 4586 mSDsluCounter, 12896 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4586 SdHoareTripleChecker+Valid, 14482 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:06,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4586 Valid, 14482 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 222 Unchecked, 0.2s Time] [2021-11-23 17:04:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2021-11-23 17:04:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 6683. [2021-11-23 17:04:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6683 states, 6681 states have (on average 1.3312378386469093) internal successors, (8894), 6682 states have internal predecessors, (8894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:07,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6683 states to 6683 states and 8894 transitions. [2021-11-23 17:04:07,127 INFO L78 Accepts]: Start accepts. Automaton has 6683 states and 8894 transitions. Word has length 118 [2021-11-23 17:04:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:07,128 INFO L470 AbstractCegarLoop]: Abstraction has 6683 states and 8894 transitions. [2021-11-23 17:04:07,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.3125) internal successors, (229), 15 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 17:04:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 6683 states and 8894 transitions. [2021-11-23 17:04:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:04:07,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:07,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:07,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:07,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:07,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:07,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:07,730 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:07,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1882083523, now seen corresponding path program 1 times [2021-11-23 17:04:07,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:07,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120136013] [2021-11-23 17:04:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:07,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:07,732 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:07,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 17:04:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:07,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:04:07,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:08,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:08,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:08,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120136013] [2021-11-23 17:04:08,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120136013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:08,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:04:08,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:04:08,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938524224] [2021-11-23 17:04:08,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:08,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:04:08,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:08,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:04:08,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:04:08,055 INFO L87 Difference]: Start difference. First operand 6683 states and 8894 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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 17:04:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:08,117 INFO L93 Difference]: Finished difference Result 6951 states and 9268 transitions. [2021-11-23 17:04:08,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:04:08,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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 17:04:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:08,124 INFO L225 Difference]: With dead ends: 6951 [2021-11-23 17:04:08,124 INFO L226 Difference]: Without dead ends: 6421 [2021-11-23 17:04:08,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 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 17:04:08,126 INFO L933 BasicCegarLoop]: 1596 mSDtfsCounter, 35 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3123 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:08,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 3123 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:04:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-11-23 17:04:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 6419. [2021-11-23 17:04:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6419 states, 6417 states have (on average 1.327255726975222) internal successors, (8517), 6418 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states 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 17:04:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6419 states to 6419 states and 8517 transitions. [2021-11-23 17:04:08,216 INFO L78 Accepts]: Start accepts. Automaton has 6419 states and 8517 transitions. Word has length 118 [2021-11-23 17:04:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:08,216 INFO L470 AbstractCegarLoop]: Abstraction has 6419 states and 8517 transitions. [2021-11-23 17:04:08,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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 17:04:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 6419 states and 8517 transitions. [2021-11-23 17:04:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:04:08,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:08,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:08,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:08,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:08,421 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:08,421 INFO L85 PathProgramCache]: Analyzing trace with hash 944304342, now seen corresponding path program 1 times [2021-11-23 17:04:08,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:08,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248368360] [2021-11-23 17:04:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:08,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:08,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:08,423 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:08,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 17:04:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:04:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:04:10,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:10,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:10,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248368360] [2021-11-23 17:04:10,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248368360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:10,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:04:10,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:04:10,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38600541] [2021-11-23 17:04:10,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:10,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:04:10,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:04:10,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:10,875 INFO L87 Difference]: Start difference. First operand 6419 states and 8517 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 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 17:04:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:11,227 INFO L93 Difference]: Finished difference Result 7101 states and 9457 transitions. [2021-11-23 17:04:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:04:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 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 119 [2021-11-23 17:04:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:11,233 INFO L225 Difference]: With dead ends: 7101 [2021-11-23 17:04:11,234 INFO L226 Difference]: Without dead ends: 6835 [2021-11-23 17:04:11,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:11,236 INFO L933 BasicCegarLoop]: 1684 mSDtfsCounter, 4008 mSDsluCounter, 2077 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4008 SdHoareTripleChecker+Valid, 3761 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:11,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4008 Valid, 3761 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:04:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6835 states. [2021-11-23 17:04:11,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6835 to 6419. [2021-11-23 17:04:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6419 states, 6417 states have (on average 1.3263207106124357) internal successors, (8511), 6418 states have internal predecessors, (8511), 0 states have call successors, (0), 0 states 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 17:04:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6419 states to 6419 states and 8511 transitions. [2021-11-23 17:04:11,329 INFO L78 Accepts]: Start accepts. Automaton has 6419 states and 8511 transitions. Word has length 119 [2021-11-23 17:04:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:11,329 INFO L470 AbstractCegarLoop]: Abstraction has 6419 states and 8511 transitions. [2021-11-23 17:04:11,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 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 17:04:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6419 states and 8511 transitions. [2021-11-23 17:04:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:04:11,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:11,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:11,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:11,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:11,531 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1848303847, now seen corresponding path program 1 times [2021-11-23 17:04:11,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:11,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915079938] [2021-11-23 17:04:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:11,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:11,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:11,533 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:11,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 17:04:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:11,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:04:11,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:04:14,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:14,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:14,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915079938] [2021-11-23 17:04:14,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915079938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:14,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:04:14,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:04:14,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831846631] [2021-11-23 17:04:14,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:14,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:04:14,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:04:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:14,409 INFO L87 Difference]: Start difference. First operand 6419 states and 8511 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:14,777 INFO L93 Difference]: Finished difference Result 7013 states and 9332 transitions. [2021-11-23 17:04:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:04:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-23 17:04:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:14,784 INFO L225 Difference]: With dead ends: 7013 [2021-11-23 17:04:14,784 INFO L226 Difference]: Without dead ends: 6923 [2021-11-23 17:04:14,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:14,786 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 5314 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5314 SdHoareTripleChecker+Valid, 3796 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:14,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5314 Valid, 3796 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:04:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6923 states. [2021-11-23 17:04:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6923 to 6511. [2021-11-23 17:04:14,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6511 states, 6509 states have (on average 1.3264710400983255) internal successors, (8634), 6510 states have internal predecessors, (8634), 0 states have call successors, (0), 0 states 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 17:04:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 8634 transitions. [2021-11-23 17:04:14,878 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 8634 transitions. Word has length 119 [2021-11-23 17:04:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:14,878 INFO L470 AbstractCegarLoop]: Abstraction has 6511 states and 8634 transitions. [2021-11-23 17:04:14,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 8634 transitions. [2021-11-23 17:04:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:04:14,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:14,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:14,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:15,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:15,080 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:15,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1091199670, now seen corresponding path program 1 times [2021-11-23 17:04:15,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:15,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082524416] [2021-11-23 17:04:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:15,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:15,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:15,082 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:15,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 17:04:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:15,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:04:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:04:17,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:17,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:17,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082524416] [2021-11-23 17:04:17,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082524416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:17,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:04:17,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:04:17,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107572881] [2021-11-23 17:04:17,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:17,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:04:17,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:04:17,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:17,610 INFO L87 Difference]: Start difference. First operand 6511 states and 8634 transitions. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 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 17:04:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:17,962 INFO L93 Difference]: Finished difference Result 7105 states and 9455 transitions. [2021-11-23 17:04:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:04:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 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 119 [2021-11-23 17:04:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:17,970 INFO L225 Difference]: With dead ends: 7105 [2021-11-23 17:04:17,970 INFO L226 Difference]: Without dead ends: 7015 [2021-11-23 17:04:17,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:17,972 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 5168 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5168 SdHoareTripleChecker+Valid, 3808 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:17,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5168 Valid, 3808 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:04:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7015 states. [2021-11-23 17:04:18,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7015 to 6609. [2021-11-23 17:04:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6609 states, 6607 states have (on average 1.3266232783411533) internal successors, (8765), 6608 states have internal predecessors, (8765), 0 states have call successors, (0), 0 states 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 17:04:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6609 states to 6609 states and 8765 transitions. [2021-11-23 17:04:18,073 INFO L78 Accepts]: Start accepts. Automaton has 6609 states and 8765 transitions. Word has length 119 [2021-11-23 17:04:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:18,074 INFO L470 AbstractCegarLoop]: Abstraction has 6609 states and 8765 transitions. [2021-11-23 17:04:18,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 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 17:04:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 6609 states and 8765 transitions. [2021-11-23 17:04:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:04:18,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:18,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:18,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:18,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:18,281 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:18,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:18,281 INFO L85 PathProgramCache]: Analyzing trace with hash 730847545, now seen corresponding path program 1 times [2021-11-23 17:04:18,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:18,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722036717] [2021-11-23 17:04:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:18,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:18,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:18,283 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:18,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 17:04:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:18,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:04:18,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:04:21,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:21,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:21,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722036717] [2021-11-23 17:04:21,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722036717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:21,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:04:21,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:04:21,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550769728] [2021-11-23 17:04:21,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:21,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:04:21,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:04:21,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:21,127 INFO L87 Difference]: Start difference. First operand 6609 states and 8765 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:04:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:21,450 INFO L93 Difference]: Finished difference Result 7203 states and 9586 transitions. [2021-11-23 17:04:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:04:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 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 17:04:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:21,457 INFO L225 Difference]: With dead ends: 7203 [2021-11-23 17:04:21,457 INFO L226 Difference]: Without dead ends: 7113 [2021-11-23 17:04:21,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:21,460 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 5054 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5054 SdHoareTripleChecker+Valid, 3799 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:21,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5054 Valid, 3799 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:04:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2021-11-23 17:04:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 6713. [2021-11-23 17:04:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6713 states, 6711 states have (on average 1.326776933392937) internal successors, (8904), 6712 states have internal predecessors, (8904), 0 states have call successors, (0), 0 states 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 17:04:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6713 states to 6713 states and 8904 transitions. [2021-11-23 17:04:21,609 INFO L78 Accepts]: Start accepts. Automaton has 6713 states and 8904 transitions. Word has length 119 [2021-11-23 17:04:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:21,609 INFO L470 AbstractCegarLoop]: Abstraction has 6713 states and 8904 transitions. [2021-11-23 17:04:21,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:04:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 6713 states and 8904 transitions. [2021-11-23 17:04:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:04:21,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:21,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:21,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:21,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:21,811 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1200553110, now seen corresponding path program 1 times [2021-11-23 17:04:21,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:21,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653935666] [2021-11-23 17:04:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:21,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:21,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:21,813 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:21,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 17:04:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:21,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:04:21,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:04:24,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:24,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:24,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653935666] [2021-11-23 17:04:24,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653935666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:24,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:04:24,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:04:24,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108310176] [2021-11-23 17:04:24,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:24,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:04:24,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:04:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:24,298 INFO L87 Difference]: Start difference. First operand 6713 states and 8904 transitions. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 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 17:04:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:24,663 INFO L93 Difference]: Finished difference Result 7307 states and 9725 transitions. [2021-11-23 17:04:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:04:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 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 119 [2021-11-23 17:04:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:24,671 INFO L225 Difference]: With dead ends: 7307 [2021-11-23 17:04:24,671 INFO L226 Difference]: Without dead ends: 7217 [2021-11-23 17:04:24,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:24,674 INFO L933 BasicCegarLoop]: 1703 mSDtfsCounter, 3749 mSDsluCounter, 2205 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3749 SdHoareTripleChecker+Valid, 3908 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:24,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3749 Valid, 3908 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:04:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7217 states. [2021-11-23 17:04:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7217 to 6823. [2021-11-23 17:04:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6823 states, 6821 states have (on average 1.3269315349655475) internal successors, (9051), 6822 states have internal predecessors, (9051), 0 states have call successors, (0), 0 states 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 17:04:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6823 states to 6823 states and 9051 transitions. [2021-11-23 17:04:24,797 INFO L78 Accepts]: Start accepts. Automaton has 6823 states and 9051 transitions. Word has length 119 [2021-11-23 17:04:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:24,798 INFO L470 AbstractCegarLoop]: Abstraction has 6823 states and 9051 transitions. [2021-11-23 17:04:24,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 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 17:04:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 6823 states and 9051 transitions. [2021-11-23 17:04:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:04:24,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:24,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:24,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:25,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:25,001 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:25,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash 725642073, now seen corresponding path program 1 times [2021-11-23 17:04:25,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:25,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231952159] [2021-11-23 17:04:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:25,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:25,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:25,002 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:25,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-23 17:04:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:25,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:04:25,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:04:27,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:27,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:27,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231952159] [2021-11-23 17:04:27,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231952159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:27,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:04:27,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:04:27,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031486570] [2021-11-23 17:04:27,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:27,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:04:27,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:04:27,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:27,856 INFO L87 Difference]: Start difference. First operand 6823 states and 9051 transitions. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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 17:04:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:28,152 INFO L93 Difference]: Finished difference Result 7417 states and 9872 transitions. [2021-11-23 17:04:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:04:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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 119 [2021-11-23 17:04:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:28,192 INFO L225 Difference]: With dead ends: 7417 [2021-11-23 17:04:28,192 INFO L226 Difference]: Without dead ends: 7327 [2021-11-23 17:04:28,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:28,193 INFO L933 BasicCegarLoop]: 1687 mSDtfsCounter, 3766 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3766 SdHoareTripleChecker+Valid, 3741 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:28,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3766 Valid, 3741 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:04:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2021-11-23 17:04:28,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 6933. [2021-11-23 17:04:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6933 states, 6931 states have (on average 1.327081229259847) internal successors, (9198), 6932 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states 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 17:04:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6933 states to 6933 states and 9198 transitions. [2021-11-23 17:04:28,332 INFO L78 Accepts]: Start accepts. Automaton has 6933 states and 9198 transitions. Word has length 119 [2021-11-23 17:04:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:28,333 INFO L470 AbstractCegarLoop]: Abstraction has 6933 states and 9198 transitions. [2021-11-23 17:04:28,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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 17:04:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 6933 states and 9198 transitions. [2021-11-23 17:04:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 17:04:28,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:28,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:28,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:28,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:28,537 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1333775929, now seen corresponding path program 1 times [2021-11-23 17:04:28,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:28,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839569537] [2021-11-23 17:04:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:28,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:28,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:28,539 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:28,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 17:04:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:28,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 17:04:28,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:54,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:07,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:07,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839569537] [2021-11-23 17:05:07,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839569537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:07,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [66112195] [2021-11-23 17:05:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:07,883 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:07,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:05:07,886 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:05:07,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-23 17:05:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:05:08,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:16,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:19,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [66112195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:19,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006695688] [2021-11-23 17:05:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:19,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:05:19,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:05:19,773 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:05:19,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-23 17:05:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 17:05:19,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:06:12,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:07:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:07:34,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006695688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:07:34,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:07:34,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 15, 15, 36, 35] total 131 [2021-11-23 17:07:34,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998093891] [2021-11-23 17:07:34,783 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:07:34,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-23 17:07:34,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:34,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-23 17:07:34,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=15519, Unknown=15, NotChecked=0, Total=17030 [2021-11-23 17:07:34,792 INFO L87 Difference]: Start difference. First operand 6933 states and 9198 transitions. Second operand has 131 states, 131 states have (on average 4.0534351145038165) internal successors, (531), 131 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 17:07:41,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:07:41,806 INFO L93 Difference]: Finished difference Result 7448 states and 9851 transitions. [2021-11-23 17:07:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 17:07:41,807 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 4.0534351145038165) internal successors, (531), 131 states have internal predecessors, (531), 0 states have call successors, (0), 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 17:07:41,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:07:41,818 INFO L225 Difference]: With dead ends: 7448 [2021-11-23 17:07:41,818 INFO L226 Difference]: Without dead ends: 7266 [2021-11-23 17:07:41,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8327 ImplicationChecksByTransitivity, 149.7s TimeCoverageRelationStatistics Valid=1679, Invalid=16396, Unknown=15, NotChecked=0, Total=18090 [2021-11-23 17:07:41,828 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 25019 mSDsluCounter, 63937 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25019 SdHoareTripleChecker+Valid, 65505 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 947 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:07:41,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25019 Valid, 65505 Invalid, 2049 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [29 Valid, 1073 Invalid, 0 Unknown, 947 Unchecked, 2.6s Time] [2021-11-23 17:07:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7266 states. [2021-11-23 17:07:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7266 to 6954. [2021-11-23 17:07:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6954 states, 6952 states have (on average 1.326668584579977) internal successors, (9223), 6953 states have internal predecessors, (9223), 0 states have call successors, (0), 0 states 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 17:07:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6954 states to 6954 states and 9223 transitions. [2021-11-23 17:07:42,040 INFO L78 Accepts]: Start accepts. Automaton has 6954 states and 9223 transitions. Word has length 120 [2021-11-23 17:07:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:07:42,040 INFO L470 AbstractCegarLoop]: Abstraction has 6954 states and 9223 transitions. [2021-11-23 17:07:42,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 4.0534351145038165) internal successors, (531), 131 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 17:07:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6954 states and 9223 transitions. [2021-11-23 17:07:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 17:07:42,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:42,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:07:42,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-23 17:07:42,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-11-23 17:07:42,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-23 17:07:42,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:07:42,643 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:07:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2030895556, now seen corresponding path program 1 times [2021-11-23 17:07:42,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:42,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500589183] [2021-11-23 17:07:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:42,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:42,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:42,645 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:42,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 17:07:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:07:42,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:08:00,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:08:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:08:11,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:11,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500589183] [2021-11-23 17:08:11,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500589183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:08:11,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149440160] [2021-11-23 17:08:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:11,926 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:08:11,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:08:11,931 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:08:11,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-23 17:08:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:12,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:08:12,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:08:17,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:08:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:08:18,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149440160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:08:18,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539971561] [2021-11-23 17:08:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:18,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:08:18,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:08:18,724 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:08:18,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-23 17:08:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:18,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 17:08:18,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:08:45,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:08:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:08:55,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539971561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:08:55,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:08:55,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 33, 11, 9, 36, 35] total 115 [2021-11-23 17:08:55,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020275934] [2021-11-23 17:08:55,143 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:08:55,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-23 17:08:55,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-23 17:08:55,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1466, Invalid=11644, Unknown=0, NotChecked=0, Total=13110 [2021-11-23 17:08:55,150 INFO L87 Difference]: Start difference. First operand 6954 states and 9223 transitions. Second operand has 115 states, 115 states have (on average 4.469565217391304) internal successors, (514), 115 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 17:09:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:09:09,911 INFO L93 Difference]: Finished difference Result 7210 states and 9549 transitions. [2021-11-23 17:09:09,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 17:09:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 4.469565217391304) internal successors, (514), 115 states have internal predecessors, (514), 0 states have call successors, (0), 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 17:09:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:09:09,919 INFO L225 Difference]: With dead ends: 7210 [2021-11-23 17:09:09,919 INFO L226 Difference]: Without dead ends: 7018 [2021-11-23 17:09:09,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6886 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=2103, Invalid=16803, Unknown=0, NotChecked=0, Total=18906 [2021-11-23 17:09:09,926 INFO L933 BasicCegarLoop]: 1536 mSDtfsCounter, 14870 mSDsluCounter, 46071 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14870 SdHoareTripleChecker+Valid, 47607 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:09:09,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14870 Valid, 47607 Invalid, 1553 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 1164 Invalid, 0 Unknown, 364 Unchecked, 2.9s Time] [2021-11-23 17:09:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7018 states. [2021-11-23 17:09:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7018 to 6955. [2021-11-23 17:09:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6955 states, 6953 states have (on average 1.3266216021861068) internal successors, (9224), 6954 states have internal predecessors, (9224), 0 states have call successors, (0), 0 states 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 17:09:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6955 states to 6955 states and 9224 transitions. [2021-11-23 17:09:10,089 INFO L78 Accepts]: Start accepts. Automaton has 6955 states and 9224 transitions. Word has length 120 [2021-11-23 17:09:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:09:10,090 INFO L470 AbstractCegarLoop]: Abstraction has 6955 states and 9224 transitions. [2021-11-23 17:09:10,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 4.469565217391304) internal successors, (514), 115 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 17:09:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6955 states and 9224 transitions. [2021-11-23 17:09:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 17:09:10,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:09:10,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:09:10,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-23 17:09:10,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-23 17:09:10,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2021-11-23 17:09:10,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:09:10,693 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:09:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:09:10,693 INFO L85 PathProgramCache]: Analyzing trace with hash -316909543, now seen corresponding path program 1 times [2021-11-23 17:09:10,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:09:10,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829973750] [2021-11-23 17:09:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:10,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:09:10,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:09:10,695 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:09:10,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 17:09:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:10,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:09:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:09:13,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:09:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:09:14,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:09:14,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829973750] [2021-11-23 17:09:14,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829973750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:09:14,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [273231138] [2021-11-23 17:09:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:14,052 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:09:14,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:09:14,053 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:09:14,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-23 17:09:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:14,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:09:14,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:09:17,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:09:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:09:18,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [273231138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:09:18,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045348810] [2021-11-23 17:09:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:18,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:09:18,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:09:18,330 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:09:18,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-23 17:09:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 17:09:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:09:33,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:09:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:09:49,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045348810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:09:49,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:09:49,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11, 9, 32, 35] total 94 [2021-11-23 17:09:49,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019168719] [2021-11-23 17:09:49,227 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:09:49,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-23 17:09:49,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:09:49,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-23 17:09:49,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=7931, Unknown=0, NotChecked=0, Total=8742 [2021-11-23 17:09:49,230 INFO L87 Difference]: Start difference. First operand 6955 states and 9224 transitions. Second operand has 94 states, 94 states have (on average 6.329787234042553) internal successors, (595), 94 states have internal predecessors, (595), 0 states have call successors, (0), 0 states 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 17:10:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:10:00,268 INFO L93 Difference]: Finished difference Result 7535 states and 9944 transitions. [2021-11-23 17:10:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 17:10:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 6.329787234042553) internal successors, (595), 94 states have internal predecessors, (595), 0 states have call successors, (0), 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 17:10:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:10:00,280 INFO L225 Difference]: With dead ends: 7535 [2021-11-23 17:10:00,280 INFO L226 Difference]: Without dead ends: 7331 [2021-11-23 17:10:00,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3999 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=1437, Invalid=12135, Unknown=0, NotChecked=0, Total=13572 [2021-11-23 17:10:00,285 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 42381 mSDsluCounter, 37715 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42381 SdHoareTripleChecker+Valid, 39289 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:10:00,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42381 Valid, 39289 Invalid, 1848 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [40 Valid, 1294 Invalid, 0 Unknown, 514 Unchecked, 3.1s Time] [2021-11-23 17:10:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7331 states. [2021-11-23 17:10:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7331 to 6956. [2021-11-23 17:10:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6956 states, 6954 states have (on average 1.326574633304573) internal successors, (9225), 6955 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states 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 17:10:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6956 states to 6956 states and 9225 transitions. [2021-11-23 17:10:00,510 INFO L78 Accepts]: Start accepts. Automaton has 6956 states and 9225 transitions. Word has length 120 [2021-11-23 17:10:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:10:00,511 INFO L470 AbstractCegarLoop]: Abstraction has 6956 states and 9225 transitions. [2021-11-23 17:10:00,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 6.329787234042553) internal successors, (595), 94 states have internal predecessors, (595), 0 states have call successors, (0), 0 states 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 17:10:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6956 states and 9225 transitions. [2021-11-23 17:10:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 17:10:00,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:10:00,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:10:00,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:00,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:00,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:01,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:01,117 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:10:01,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:10:01,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1359061084, now seen corresponding path program 1 times [2021-11-23 17:10:01,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:10:01,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632113927] [2021-11-23 17:10:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:01,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:10:01,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:10:01,119 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:10:01,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-23 17:10:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:10:01,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:03,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:04,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:10:04,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632113927] [2021-11-23 17:10:04,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632113927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:04,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [22308488] [2021-11-23 17:10:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:04,438 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:04,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:10:04,439 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:10:04,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-23 17:10:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:04,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:10:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:07,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:08,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [22308488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:08,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371834270] [2021-11-23 17:10:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:08,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:10:08,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:10:08,725 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:10:08,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-23 17:10:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:08,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 17:10:08,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:22,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:55,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371834270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:55,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:10:55,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11, 9, 32, 39] total 95 [2021-11-23 17:10:55,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710766677] [2021-11-23 17:10:55,675 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:10:55,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-23 17:10:55,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:10:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-23 17:10:55,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=8068, Unknown=0, NotChecked=0, Total=8930 [2021-11-23 17:10:55,678 INFO L87 Difference]: Start difference. First operand 6956 states and 9225 transitions. Second operand has 95 states, 95 states have (on average 6.221052631578948) internal successors, (591), 95 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 17:11:07,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:11:07,415 INFO L93 Difference]: Finished difference Result 7578 states and 9991 transitions. [2021-11-23 17:11:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 17:11:07,415 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 6.221052631578948) internal successors, (591), 95 states have internal predecessors, (591), 0 states have call successors, (0), 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 17:11:07,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:11:07,422 INFO L225 Difference]: With dead ends: 7578 [2021-11-23 17:11:07,422 INFO L226 Difference]: Without dead ends: 7362 [2021-11-23 17:11:07,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4111 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=1535, Invalid=12271, Unknown=0, NotChecked=0, Total=13806 [2021-11-23 17:11:07,425 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 32170 mSDsluCounter, 28769 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32170 SdHoareTripleChecker+Valid, 30346 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:11:07,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32170 Valid, 30346 Invalid, 1911 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 1480 Invalid, 0 Unknown, 392 Unchecked, 3.6s Time] [2021-11-23 17:11:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2021-11-23 17:11:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 6957. [2021-11-23 17:11:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6957 states, 6955 states have (on average 1.3265276779295472) internal successors, (9226), 6956 states have internal predecessors, (9226), 0 states have call successors, (0), 0 states 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 17:11:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 9226 transitions. [2021-11-23 17:11:07,601 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 9226 transitions. Word has length 120 [2021-11-23 17:11:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:11:07,601 INFO L470 AbstractCegarLoop]: Abstraction has 6957 states and 9226 transitions. [2021-11-23 17:11:07,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 6.221052631578948) internal successors, (591), 95 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 17:11:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 9226 transitions. [2021-11-23 17:11:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 17:11:07,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:07,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:11:07,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:07,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:08,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:08,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:11:08,204 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash -478279175, now seen corresponding path program 1 times [2021-11-23 17:11:08,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:08,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222552431] [2021-11-23 17:11:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:08,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:08,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:08,206 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:08,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-23 17:11:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:08,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:11:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:12,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:13,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:11:13,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222552431] [2021-11-23 17:11:13,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222552431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:11:13,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [323973204] [2021-11-23 17:11:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:13,426 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:11:13,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:11:13,427 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:11:13,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-11-23 17:11:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:11:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:17,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:17,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [323973204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:11:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421849117] [2021-11-23 17:11:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:17,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:11:17,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:11:17,986 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:11:17,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-23 17:11:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:18,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 17:11:18,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:29,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:38,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421849117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:11:38,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:11:38,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 11, 9, 29, 28] total 92 [2021-11-23 17:11:38,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276507220] [2021-11-23 17:11:38,815 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:11:38,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-23 17:11:38,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:38,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-23 17:11:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=7424, Unknown=0, NotChecked=0, Total=8372 [2021-11-23 17:11:38,818 INFO L87 Difference]: Start difference. First operand 6957 states and 9226 transitions. Second operand has 92 states, 92 states have (on average 5.967391304347826) internal successors, (549), 92 states have internal predecessors, (549), 0 states have call successors, (0), 0 states 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 17:11:47,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:11:47,987 INFO L93 Difference]: Finished difference Result 7565 states and 9971 transitions. [2021-11-23 17:11:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 17:11:47,988 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 5.967391304347826) internal successors, (549), 92 states have internal predecessors, (549), 0 states have call successors, (0), 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 17:11:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:11:47,995 INFO L225 Difference]: With dead ends: 7565 [2021-11-23 17:11:47,995 INFO L226 Difference]: Without dead ends: 7337 [2021-11-23 17:11:47,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 628 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4722 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=1535, Invalid=10455, Unknown=0, NotChecked=0, Total=11990 [2021-11-23 17:11:47,998 INFO L933 BasicCegarLoop]: 1578 mSDtfsCounter, 23459 mSDsluCounter, 46335 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23459 SdHoareTripleChecker+Valid, 47913 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:11:47,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23459 Valid, 47913 Invalid, 1709 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [35 Valid, 1374 Invalid, 0 Unknown, 300 Unchecked, 3.4s Time] [2021-11-23 17:11:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7337 states. [2021-11-23 17:11:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7337 to 6923. [2021-11-23 17:11:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6923 states, 6921 states have (on average 1.3265424071665943) internal successors, (9181), 6922 states have internal predecessors, (9181), 0 states have call successors, (0), 0 states 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 17:11:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 9181 transitions. [2021-11-23 17:11:48,167 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 9181 transitions. Word has length 120 [2021-11-23 17:11:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:11:48,167 INFO L470 AbstractCegarLoop]: Abstraction has 6923 states and 9181 transitions. [2021-11-23 17:11:48,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 5.967391304347826) internal successors, (549), 92 states have internal predecessors, (549), 0 states have call successors, (0), 0 states 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 17:11:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 9181 transitions. [2021-11-23 17:11:48,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 17:11:48,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:48,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:11:48,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:48,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:48,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:48,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:11:48,771 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:48,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1448764421, now seen corresponding path program 1 times [2021-11-23 17:11:48,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:48,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375500059] [2021-11-23 17:11:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:48,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:48,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:48,773 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:48,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-23 17:11:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:48,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:11:48,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:11:49,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:11:49,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:11:49,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375500059] [2021-11-23 17:11:49,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375500059] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:11:49,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1482454554] [2021-11-23 17:11:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:49,841 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:11:49,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:11:49,847 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:11:49,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2021-11-23 17:11:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:50,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:11:50,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:11:50,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:11:51,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1482454554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:11:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632021524] [2021-11-23 17:11:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:51,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:11:51,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:11:51,057 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:11:51,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-23 17:11:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:51,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:11:51,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:11:51,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:11:52,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632021524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:11:52,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:11:52,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 7 [2021-11-23 17:11:52,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256437909] [2021-11-23 17:11:52,615 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:11:52,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:11:52,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:52,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:11:52,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:11:52,617 INFO L87 Difference]: Start difference. First operand 6923 states and 9181 transitions. Second operand has 7 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 17:11:52,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:11:52,980 INFO L93 Difference]: Finished difference Result 8981 states and 11907 transitions. [2021-11-23 17:11:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:11:52,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 0 states have call successors, (0), 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 121 [2021-11-23 17:11:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:11:52,989 INFO L225 Difference]: With dead ends: 8981 [2021-11-23 17:11:52,989 INFO L226 Difference]: Without dead ends: 8275 [2021-11-23 17:11:52,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 712 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:11:52,993 INFO L933 BasicCegarLoop]: 1616 mSDtfsCounter, 6126 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6126 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:11:52,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6126 Valid, 3479 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-11-23 17:11:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8275 states. [2021-11-23 17:11:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8275 to 8147. [2021-11-23 17:11:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8147 states, 8145 states have (on average 1.321792510742787) internal successors, (10766), 8146 states have internal predecessors, (10766), 0 states have call successors, (0), 0 states 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 17:11:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8147 states to 8147 states and 10766 transitions. [2021-11-23 17:11:53,259 INFO L78 Accepts]: Start accepts. Automaton has 8147 states and 10766 transitions. Word has length 121 [2021-11-23 17:11:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:11:53,259 INFO L470 AbstractCegarLoop]: Abstraction has 8147 states and 10766 transitions. [2021-11-23 17:11:53,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 17:11:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 8147 states and 10766 transitions. [2021-11-23 17:11:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 17:11:53,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:53,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:11:53,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:53,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:53,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:53,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:11:53,863 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:53,863 INFO L85 PathProgramCache]: Analyzing trace with hash -110825938, now seen corresponding path program 1 times [2021-11-23 17:11:53,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:53,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296357450] [2021-11-23 17:11:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:53,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:53,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:53,865 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:53,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_148e0a9f-df00-4233-8f04-9a4a84fdb525/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-23 17:11:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:53,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:11:53,980 INFO L286 TraceCheckSpWp]: Computing forward predicates...