./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7 --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 3012c2825f53c0db53d950c12df6540de859b34b2bef033c36a98846352dedd3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:48:57,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:48:57,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:48:57,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:48:57,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:48:57,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:48:57,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:48:57,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:48:57,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:48:57,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:48:57,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:48:57,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:48:57,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:48:57,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:48:57,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:48:57,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:48:57,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:48:57,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:48:57,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:48:57,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:48:57,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:48:57,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:48:57,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:48:57,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:48:57,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:48:57,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:48:57,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:48:57,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:48:57,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:48:57,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:48:57,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:48:57,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:48:57,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:48:57,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:48:57,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:48:57,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:48:57,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:48:57,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:48:57,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:48:57,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:48:57,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:48:57,178 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:48:57,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:48:57,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:48:57,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:48:57,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:48:57,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:48:57,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:48:57,208 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:48:57,208 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:48:57,208 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:48:57,208 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:48:57,209 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:48:57,209 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:48:57,209 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:48:57,209 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:48:57,209 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:48:57,210 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:48:57,210 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:48:57,210 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:48:57,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:48:57,211 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:48:57,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:48:57,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:48:57,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:48:57,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:48:57,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:48:57,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:48:57,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:48:57,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:48:57,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:48:57,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:48:57,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:48:57,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:48:57,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:48:57,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:48:57,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:48:57,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:48:57,215 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:48:57,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:48:57,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:48:57,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:48:57,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:48:57,216 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_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3012c2825f53c0db53d950c12df6540de859b34b2bef033c36a98846352dedd3 [2021-11-25 17:48:57,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:48:57,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:48:57,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:48:57,550 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:48:57,550 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:48:57,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i [2021-11-25 17:48:57,622 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/data/e7aa79935/7e0b49d11ddd42bda0883afe4b3119f4/FLAG1de9063cf [2021-11-25 17:48:58,233 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:48:58,234 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i [2021-11-25 17:48:58,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/data/e7aa79935/7e0b49d11ddd42bda0883afe4b3119f4/FLAG1de9063cf [2021-11-25 17:48:58,447 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/data/e7aa79935/7e0b49d11ddd42bda0883afe4b3119f4 [2021-11-25 17:48:58,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:48:58,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:48:58,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:48:58,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:48:58,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:48:58,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:48:58" (1/1) ... [2021-11-25 17:48:58,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15aff4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:58, skipping insertion in model container [2021-11-25 17:48:58,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:48:58" (1/1) ... [2021-11-25 17:48:58,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:48:58,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:48:59,168 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44118,44131] [2021-11-25 17:48:59,188 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44660,44673] [2021-11-25 17:48:59,341 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56247,56260] [2021-11-25 17:48:59,343 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56368,56381] [2021-11-25 17:48:59,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:48:59,367 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:48:59,417 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44118,44131] [2021-11-25 17:48:59,421 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44660,44673] [2021-11-25 17:48:59,505 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56247,56260] [2021-11-25 17:48:59,506 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56368,56381] [2021-11-25 17:48:59,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:48:59,592 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:48:59,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59 WrapperNode [2021-11-25 17:48:59,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:48:59,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:48:59,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:48:59,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:48:59,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (1/1) ... [2021-11-25 17:48:59,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (1/1) ... [2021-11-25 17:48:59,762 INFO L137 Inliner]: procedures = 282, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1040 [2021-11-25 17:48:59,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:48:59,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:48:59,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:48:59,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:48:59,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (1/1) ... [2021-11-25 17:48:59,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (1/1) ... [2021-11-25 17:48:59,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (1/1) ... [2021-11-25 17:48:59,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (1/1) ... [2021-11-25 17:48:59,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (1/1) ... [2021-11-25 17:48:59,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (1/1) ... [2021-11-25 17:48:59,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (1/1) ... [2021-11-25 17:48:59,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:48:59,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:48:59,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:48:59,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:48:59,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (1/1) ... [2021-11-25 17:48:59,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:48:59,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:48:59,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:49:00,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:49:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:49:00,047 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 17:49:00,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 17:49:00,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:49:00,047 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-25 17:49:00,048 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-25 17:49:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 17:49:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 17:49:00,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 17:49:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 17:49:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 17:49:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:49:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-25 17:49:00,049 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-25 17:49:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 17:49:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-25 17:49:00,049 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-25 17:49:00,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:49:00,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:49:00,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:49:00,244 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:49:00,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:49:01,231 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:49:01,556 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:49:01,557 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-25 17:49:01,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:49:01 BoogieIcfgContainer [2021-11-25 17:49:01,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:49:01,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:49:01,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:49:01,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:49:01,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:48:58" (1/3) ... [2021-11-25 17:49:01,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f79b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:49:01, skipping insertion in model container [2021-11-25 17:49:01,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:59" (2/3) ... [2021-11-25 17:49:01,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f79b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:49:01, skipping insertion in model container [2021-11-25 17:49:01,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:49:01" (3/3) ... [2021-11-25 17:49:01,575 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test6-1.i [2021-11-25 17:49:01,580 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:49:01,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 17:49:01,642 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:49:01,658 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 [2021-11-25 17:49:01,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 17:49:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 124 states have internal predecessors, (206), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 17:49:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 17:49:01,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:01,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:01,692 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:01,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:01,698 INFO L85 PathProgramCache]: Analyzing trace with hash 898140550, now seen corresponding path program 1 times [2021-11-25 17:49:01,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:01,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278882343] [2021-11-25 17:49:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:01,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:01,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278882343] [2021-11-25 17:49:01,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278882343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:01,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:01,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:49:01,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934167872] [2021-11-25 17:49:01,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:01,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 17:49:01,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:01,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 17:49:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 17:49:01,904 INFO L87 Difference]: Start difference. First operand has 142 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 124 states have internal predecessors, (206), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:02,630 INFO L93 Difference]: Finished difference Result 281 states and 474 transitions. [2021-11-25 17:49:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 17:49:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-25 17:49:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:02,645 INFO L225 Difference]: With dead ends: 281 [2021-11-25 17:49:02,645 INFO L226 Difference]: Without dead ends: 138 [2021-11-25 17:49:02,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 17:49:02,652 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:02,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 144 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:49:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-25 17:49:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-11-25 17:49:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.188034188034188) internal successors, (139), 122 states have internal predecessors, (139), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 17:49:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 164 transitions. [2021-11-25 17:49:02,701 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 164 transitions. Word has length 7 [2021-11-25 17:49:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:02,701 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 164 transitions. [2021-11-25 17:49:02,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 164 transitions. [2021-11-25 17:49:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 17:49:02,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:02,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:02,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:49:02,703 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:02,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1458001887, now seen corresponding path program 1 times [2021-11-25 17:49:02,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:02,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918165731] [2021-11-25 17:49:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:02,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:02,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:02,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918165731] [2021-11-25 17:49:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918165731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:02,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:02,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:49:02,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915689800] [2021-11-25 17:49:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:02,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:49:02,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:02,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:49:02,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:49:02,778 INFO L87 Difference]: Start difference. First operand 138 states and 164 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:04,212 INFO L93 Difference]: Finished difference Result 276 states and 329 transitions. [2021-11-25 17:49:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:49:04,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-25 17:49:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:04,220 INFO L225 Difference]: With dead ends: 276 [2021-11-25 17:49:04,221 INFO L226 Difference]: Without dead ends: 203 [2021-11-25 17:49:04,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:04,223 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 66 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:04,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 392 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 17:49:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-25 17:49:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 140. [2021-11-25 17:49:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 119 states have (on average 1.184873949579832) internal successors, (141), 124 states have internal predecessors, (141), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 17:49:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2021-11-25 17:49:04,246 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 9 [2021-11-25 17:49:04,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:04,247 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2021-11-25 17:49:04,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:04,247 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2021-11-25 17:49:04,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 17:49:04,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:04,249 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] [2021-11-25 17:49:04,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:49:04,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:04,253 INFO L85 PathProgramCache]: Analyzing trace with hash 496803015, now seen corresponding path program 1 times [2021-11-25 17:49:04,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:04,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995583510] [2021-11-25 17:49:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:04,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:04,320 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:49:04,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193941288] [2021-11-25 17:49:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:04,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:04,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:04,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:04,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:49:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 17:49:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:04,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:04,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:04,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995583510] [2021-11-25 17:49:04,883 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:49:04,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193941288] [2021-11-25 17:49:04,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193941288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:04,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:04,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:49:04,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770557730] [2021-11-25 17:49:04,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:04,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:49:04,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:04,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:49:04,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:49:04,885 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:06,505 INFO L93 Difference]: Finished difference Result 151 states and 177 transitions. [2021-11-25 17:49:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:49:06,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 17:49:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:06,507 INFO L225 Difference]: With dead ends: 151 [2021-11-25 17:49:06,507 INFO L226 Difference]: Without dead ends: 149 [2021-11-25 17:49:06,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:49:06,509 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 11 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:06,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 688 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 17:49:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-25 17:49:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-25 17:49:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 125 states have (on average 1.184) internal successors, (148), 131 states have internal predecessors, (148), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 17:49:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2021-11-25 17:49:06,523 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 20 [2021-11-25 17:49:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:06,524 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2021-11-25 17:49:06,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2021-11-25 17:49:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 17:49:06,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:06,525 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] [2021-11-25 17:49:06,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 17:49:06,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:06,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:06,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash 785813656, now seen corresponding path program 1 times [2021-11-25 17:49:06,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:06,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081623929] [2021-11-25 17:49:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:06,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:06,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:49:06,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579062241] [2021-11-25 17:49:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:06,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:06,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:06,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:06,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:49:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:07,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:49:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:07,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:07,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:07,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081623929] [2021-11-25 17:49:07,647 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:49:07,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579062241] [2021-11-25 17:49:07,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579062241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:07,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:07,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:49:07,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801073310] [2021-11-25 17:49:07,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:07,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:49:07,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:07,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:49:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:49:07,651 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:08,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:08,874 INFO L93 Difference]: Finished difference Result 352 states and 415 transitions. [2021-11-25 17:49:08,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:49:08,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-25 17:49:08,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:08,878 INFO L225 Difference]: With dead ends: 352 [2021-11-25 17:49:08,878 INFO L226 Difference]: Without dead ends: 206 [2021-11-25 17:49:08,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:49:08,881 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 52 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:08,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 276 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 17:49:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-25 17:49:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 192. [2021-11-25 17:49:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 168 states have (on average 1.1726190476190477) internal successors, (197), 174 states have internal predecessors, (197), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 17:49:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 224 transitions. [2021-11-25 17:49:08,902 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 224 transitions. Word has length 28 [2021-11-25 17:49:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:08,903 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 224 transitions. [2021-11-25 17:49:08,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 224 transitions. [2021-11-25 17:49:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 17:49:08,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:08,904 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 17:49:08,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:09,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:09,127 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1058406850, now seen corresponding path program 1 times [2021-11-25 17:49:09,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:09,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758553978] [2021-11-25 17:49:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:09,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:09,227 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:49:09,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151857193] [2021-11-25 17:49:09,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:09,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:09,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:09,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:09,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 17:49:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:09,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:49:09,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:09,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:09,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:09,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758553978] [2021-11-25 17:49:09,809 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:49:09,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151857193] [2021-11-25 17:49:09,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151857193] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:09,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:49:09,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2021-11-25 17:49:09,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435325230] [2021-11-25 17:49:09,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:09,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:49:09,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:49:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:49:09,812 INFO L87 Difference]: Start difference. First operand 192 states and 224 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 17:49:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:11,431 INFO L93 Difference]: Finished difference Result 710 states and 839 transitions. [2021-11-25 17:49:11,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:49:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-11-25 17:49:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:11,437 INFO L225 Difference]: With dead ends: 710 [2021-11-25 17:49:11,437 INFO L226 Difference]: Without dead ends: 534 [2021-11-25 17:49:11,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:49:11,440 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 699 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:11,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 416 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 17:49:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-25 17:49:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 312. [2021-11-25 17:49:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 283 states have (on average 1.176678445229682) internal successors, (333), 289 states have internal predecessors, (333), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-25 17:49:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 365 transitions. [2021-11-25 17:49:11,471 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 365 transitions. Word has length 32 [2021-11-25 17:49:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:11,471 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 365 transitions. [2021-11-25 17:49:11,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 17:49:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 365 transitions. [2021-11-25 17:49:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 17:49:11,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:11,474 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 17:49:11,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:11,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:11,700 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:11,700 INFO L85 PathProgramCache]: Analyzing trace with hash 229369108, now seen corresponding path program 1 times [2021-11-25 17:49:11,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:11,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787295502] [2021-11-25 17:49:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:11,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:11,774 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:49:11,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585115261] [2021-11-25 17:49:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:11,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:11,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:11,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:11,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 17:49:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:12,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:49:12,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:49:12,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:12,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:12,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787295502] [2021-11-25 17:49:12,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:49:12,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585115261] [2021-11-25 17:49:12,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585115261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:12,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:12,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:49:12,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865331839] [2021-11-25 17:49:12,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:12,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:49:12,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:49:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:49:12,374 INFO L87 Difference]: Start difference. First operand 312 states and 365 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 17:49:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:14,125 INFO L93 Difference]: Finished difference Result 592 states and 694 transitions. [2021-11-25 17:49:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:49:14,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2021-11-25 17:49:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:14,131 INFO L225 Difference]: With dead ends: 592 [2021-11-25 17:49:14,131 INFO L226 Difference]: Without dead ends: 312 [2021-11-25 17:49:14,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:49:14,133 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 17 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:14,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 480 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-25 17:49:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-25 17:49:14,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-11-25 17:49:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 283 states have (on average 1.176678445229682) internal successors, (333), 289 states have internal predecessors, (333), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 17:49:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 364 transitions. [2021-11-25 17:49:14,153 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 364 transitions. Word has length 57 [2021-11-25 17:49:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:14,154 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 364 transitions. [2021-11-25 17:49:14,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 17:49:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 364 transitions. [2021-11-25 17:49:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 17:49:14,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:14,156 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 17:49:14,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:14,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:14,376 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 378165262, now seen corresponding path program 1 times [2021-11-25 17:49:14,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:14,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379357491] [2021-11-25 17:49:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:14,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:14,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:49:14,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412477815] [2021-11-25 17:49:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:14,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:14,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:14,429 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:14,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 17:49:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:14,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:49:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:15,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:49:15,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 17:49:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 17:49:15,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:15,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:15,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379357491] [2021-11-25 17:49:15,108 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:49:15,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412477815] [2021-11-25 17:49:15,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412477815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:15,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:15,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:15,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155719255] [2021-11-25 17:49:15,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:15,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:49:15,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:15,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:49:15,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:49:15,112 INFO L87 Difference]: Start difference. First operand 312 states and 364 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 17:49:17,654 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 17:49:19,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 17:49:19,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:19,308 INFO L93 Difference]: Finished difference Result 415 states and 494 transitions. [2021-11-25 17:49:19,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:49:19,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 62 [2021-11-25 17:49:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:19,314 INFO L225 Difference]: With dead ends: 415 [2021-11-25 17:49:19,314 INFO L226 Difference]: Without dead ends: 402 [2021-11-25 17:49:19,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:19,315 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 48 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:19,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 387 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 17:49:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-25 17:49:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 316. [2021-11-25 17:49:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 287 states have (on average 1.1742160278745644) internal successors, (337), 293 states have internal predecessors, (337), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 17:49:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 368 transitions. [2021-11-25 17:49:19,338 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 368 transitions. Word has length 62 [2021-11-25 17:49:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:19,339 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 368 transitions. [2021-11-25 17:49:19,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 17:49:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 368 transitions. [2021-11-25 17:49:19,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 17:49:19,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:19,345 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-25 17:49:19,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:19,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:19,567 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash -867645780, now seen corresponding path program 1 times [2021-11-25 17:49:19,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:19,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848216680] [2021-11-25 17:49:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:19,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:19,616 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:49:19,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758022398] [2021-11-25 17:49:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:19,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:19,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:19,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:19,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 17:49:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:20,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 17:49:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 17:49:20,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:20,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:20,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848216680] [2021-11-25 17:49:20,550 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:49:20,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758022398] [2021-11-25 17:49:20,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758022398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:20,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:20,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 17:49:20,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111230054] [2021-11-25 17:49:20,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:20,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:49:20,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:20,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:49:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:49:20,554 INFO L87 Difference]: Start difference. First operand 316 states and 368 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 17:49:23,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 17:49:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:24,230 INFO L93 Difference]: Finished difference Result 604 states and 709 transitions. [2021-11-25 17:49:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 17:49:24,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-11-25 17:49:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:24,237 INFO L225 Difference]: With dead ends: 604 [2021-11-25 17:49:24,237 INFO L226 Difference]: Without dead ends: 319 [2021-11-25 17:49:24,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:49:24,239 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 14 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:24,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 889 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-25 17:49:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-25 17:49:24,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-11-25 17:49:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 289 states have (on average 1.1764705882352942) internal successors, (340), 296 states have internal predecessors, (340), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-25 17:49:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 372 transitions. [2021-11-25 17:49:24,288 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 372 transitions. Word has length 69 [2021-11-25 17:49:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:24,289 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 372 transitions. [2021-11-25 17:49:24,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 17:49:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 372 transitions. [2021-11-25 17:49:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 17:49:24,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:24,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-25 17:49:24,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:24,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:24,492 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:24,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1536874878, now seen corresponding path program 1 times [2021-11-25 17:49:24,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:24,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028415138] [2021-11-25 17:49:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:24,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:24,559 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:49:24,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050316653] [2021-11-25 17:49:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:24,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:24,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:24,562 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:24,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 17:49:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:27,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 17:49:27,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 17:49:27,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 17:49:27,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028415138] [2021-11-25 17:49:27,941 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:49:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050316653] [2021-11-25 17:49:27,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050316653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301016683] [2021-11-25 17:49:27,972 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2021-11-25 17:49:27,973 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:27,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:27,985 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:27,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:28,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:28,184 INFO L354 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2021-11-25 17:49:28,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 70 [2021-11-25 17:49:28,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 17:49:28,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-11-25 17:49:28,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-25 17:49:28,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 17:49:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,341 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 17:49:28,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 17:49:28,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 17:49:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 17:49:28,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 17:49:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 17:49:28,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,563 INFO L354 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2021-11-25 17:49:28,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 112 [2021-11-25 17:49:28,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:28,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 17:49:28,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 17:49:28,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:28,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:28,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 44 [2021-11-25 17:49:28,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,950 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 17:49:28,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2021-11-25 17:49:28,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:28,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-25 17:49:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:29,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 17:49:29,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:29,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:29,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:29,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-11-25 17:49:29,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:29,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-11-25 17:49:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:29,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:29,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 367 [2021-11-25 17:49:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 473 treesize of output 373 [2021-11-25 17:49:30,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 17:49:30,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 17:49:30,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 64 [2021-11-25 17:49:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 513 treesize of output 409 [2021-11-25 17:49:30,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 428 treesize of output 430 [2021-11-25 17:49:30,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:30,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:30,653 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:154) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:142) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:110) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:90) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) 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) [2021-11-25 17:49:30,657 INFO L158 Benchmark]: Toolchain (without parser) took 32206.59ms. Allocated memory was 113.2MB in the beginning and 237.0MB in the end (delta: 123.7MB). Free memory was 69.3MB in the beginning and 138.3MB in the end (delta: -69.0MB). Peak memory consumption was 54.8MB. Max. memory is 16.1GB. [2021-11-25 17:49:30,657 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 17:49:30,658 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1139.15ms. Allocated memory is still 113.2MB. Free memory was 69.2MB in the beginning and 53.9MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-25 17:49:30,658 INFO L158 Benchmark]: Boogie Procedure Inliner took 169.55ms. Allocated memory is still 113.2MB. Free memory was 53.9MB in the beginning and 46.9MB in the end (delta: 7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 17:49:30,658 INFO L158 Benchmark]: Boogie Preprocessor took 142.85ms. Allocated memory is still 113.2MB. Free memory was 46.9MB in the beginning and 83.8MB in the end (delta: -36.9MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2021-11-25 17:49:30,659 INFO L158 Benchmark]: RCFGBuilder took 1656.24ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 83.8MB in the beginning and 96.6MB in the end (delta: -12.8MB). Peak memory consumption was 64.5MB. Max. memory is 16.1GB. [2021-11-25 17:49:30,659 INFO L158 Benchmark]: TraceAbstraction took 29088.93ms. Allocated memory was 146.8MB in the beginning and 237.0MB in the end (delta: 90.2MB). Free memory was 96.6MB in the beginning and 138.3MB in the end (delta: -41.7MB). Peak memory consumption was 49.1MB. Max. memory is 16.1GB. [2021-11-25 17:49:30,661 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1139.15ms. Allocated memory is still 113.2MB. Free memory was 69.2MB in the beginning and 53.9MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 169.55ms. Allocated memory is still 113.2MB. Free memory was 53.9MB in the beginning and 46.9MB in the end (delta: 7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 142.85ms. Allocated memory is still 113.2MB. Free memory was 46.9MB in the beginning and 83.8MB in the end (delta: -36.9MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1656.24ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 83.8MB in the beginning and 96.6MB in the end (delta: -12.8MB). Peak memory consumption was 64.5MB. Max. memory is 16.1GB. * TraceAbstraction took 29088.93ms. Allocated memory was 146.8MB in the beginning and 237.0MB in the end (delta: 90.2MB). Free memory was 96.6MB in the beginning and 138.3MB in the end (delta: -41.7MB). Peak memory consumption was 49.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:108) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-25 17:49:30,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/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_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7 --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 3012c2825f53c0db53d950c12df6540de859b34b2bef033c36a98846352dedd3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:49:33,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:49:33,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:49:33,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:49:33,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:49:33,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:49:33,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:49:33,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:49:33,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:49:33,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:49:33,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:49:33,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:49:33,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:49:33,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:49:33,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:49:33,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:49:33,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:49:33,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:49:33,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:49:33,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:49:33,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:49:33,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:49:33,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:49:33,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:49:33,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:49:33,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:49:33,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:49:33,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:49:33,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:49:33,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:49:33,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:49:33,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:49:33,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:49:33,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:49:33,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:49:33,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:49:33,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:49:33,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:49:33,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:49:33,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:49:33,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:49:33,165 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 17:49:33,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:49:33,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:49:33,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:49:33,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:49:33,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:49:33,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:49:33,193 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:49:33,193 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:49:33,193 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:49:33,193 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:49:33,194 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:49:33,194 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:49:33,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:49:33,195 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:49:33,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:49:33,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:49:33,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:49:33,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:49:33,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:49:33,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 17:49:33,199 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 17:49:33,199 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 17:49:33,199 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:49:33,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:49:33,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:49:33,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:49:33,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:49:33,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 17:49:33,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:49:33,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:49:33,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:49:33,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:49:33,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:49:33,203 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 17:49:33,203 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 17:49:33,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:49:33,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:49:33,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:49:33,205 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_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3012c2825f53c0db53d950c12df6540de859b34b2bef033c36a98846352dedd3 [2021-11-25 17:49:33,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:49:33,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:49:33,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:49:33,610 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:49:33,610 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:49:33,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i [2021-11-25 17:49:33,700 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/data/96b1d7d21/ef6dcce208cc43e1a336cbd7579cb239/FLAGa52f59eea [2021-11-25 17:49:34,424 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:49:34,425 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i [2021-11-25 17:49:34,447 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/data/96b1d7d21/ef6dcce208cc43e1a336cbd7579cb239/FLAGa52f59eea [2021-11-25 17:49:34,635 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/data/96b1d7d21/ef6dcce208cc43e1a336cbd7579cb239 [2021-11-25 17:49:34,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:49:34,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:49:34,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:49:34,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:49:34,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:49:34,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:49:34" (1/1) ... [2021-11-25 17:49:34,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73eda17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:34, skipping insertion in model container [2021-11-25 17:49:34,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:49:34" (1/1) ... [2021-11-25 17:49:34,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:49:34,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:49:35,563 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44118,44131] [2021-11-25 17:49:35,584 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44660,44673] [2021-11-25 17:49:35,744 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56247,56260] [2021-11-25 17:49:35,746 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56368,56381] [2021-11-25 17:49:35,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:49:35,764 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 17:49:35,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:49:35,814 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44118,44131] [2021-11-25 17:49:35,816 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44660,44673] [2021-11-25 17:49:35,915 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56247,56260] [2021-11-25 17:49:35,916 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56368,56381] [2021-11-25 17:49:35,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:49:35,943 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:49:35,988 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44118,44131] [2021-11-25 17:49:35,990 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44660,44673] [2021-11-25 17:49:36,063 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56247,56260] [2021-11-25 17:49:36,064 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_10d1992b-f282-4339-b9f5-7826137deb12/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56368,56381] [2021-11-25 17:49:36,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:49:36,178 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:49:36,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36 WrapperNode [2021-11-25 17:49:36,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:49:36,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:49:36,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:49:36,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:49:36,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,302 INFO L137 Inliner]: procedures = 285, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1039 [2021-11-25 17:49:36,310 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:49:36,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:49:36,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:49:36,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:49:36,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:49:36,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:49:36,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:49:36,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:49:36,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (1/1) ... [2021-11-25 17:49:36,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:49:36,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:36,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:49:36,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:49:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 17:49:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 17:49:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:49:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 17:49:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 17:49:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:49:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 17:49:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 17:49:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-25 17:49:36,641 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-25 17:49:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 17:49:36,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 17:49:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 17:49:36,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:49:36,642 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-25 17:49:36,643 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-25 17:49:36,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 17:49:36,644 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-25 17:49:36,644 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-25 17:49:36,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:49:36,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:49:37,011 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:49:37,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:49:42,359 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:49:42,372 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:49:42,372 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-25 17:49:42,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:49:42 BoogieIcfgContainer [2021-11-25 17:49:42,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:49:42,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:49:42,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:49:42,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:49:42,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:49:34" (1/3) ... [2021-11-25 17:49:42,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301bde16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:49:42, skipping insertion in model container [2021-11-25 17:49:42,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:36" (2/3) ... [2021-11-25 17:49:42,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301bde16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:49:42, skipping insertion in model container [2021-11-25 17:49:42,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:49:42" (3/3) ... [2021-11-25 17:49:42,382 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test6-1.i [2021-11-25 17:49:42,387 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:49:42,387 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 17:49:42,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:49:42,440 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 [2021-11-25 17:49:42,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 17:49:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 17:49:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 17:49:42,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:42,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:42,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-25 17:49:42,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:49:42,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819861152] [2021-11-25 17:49:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:42,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:49:42,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:49:42,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:49:42,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 17:49:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 17:49:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:42,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:42,875 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:49:42,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819861152] [2021-11-25 17:49:42,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819861152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:42,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:42,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:49:42,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008113641] [2021-11-25 17:49:42,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:42,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 17:49:42,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:49:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 17:49:42,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 17:49:42,942 INFO L87 Difference]: Start difference. First operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:42,993 INFO L93 Difference]: Finished difference Result 445 states and 724 transitions. [2021-11-25 17:49:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 17:49:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-25 17:49:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:43,020 INFO L225 Difference]: With dead ends: 445 [2021-11-25 17:49:43,021 INFO L226 Difference]: Without dead ends: 218 [2021-11-25 17:49:43,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 17:49:43,038 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:43,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:49:43,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-25 17:49:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-25 17:49:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 197 states have (on average 1.299492385786802) internal successors, (256), 202 states have internal predecessors, (256), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 17:49:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 281 transitions. [2021-11-25 17:49:43,131 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 281 transitions. Word has length 8 [2021-11-25 17:49:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:43,132 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 281 transitions. [2021-11-25 17:49:43,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 281 transitions. [2021-11-25 17:49:43,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 17:49:43,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:43,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:43,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:43,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:49:43,350 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-25 17:49:43,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:49:43,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240837080] [2021-11-25 17:49:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:43,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:49:43,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:49:43,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:49:43,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 17:49:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:43,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:49:43,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:43,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:43,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:49:43,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240837080] [2021-11-25 17:49:43,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240837080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:43,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:43,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:43,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263769019] [2021-11-25 17:49:43,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:43,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:49:43,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:49:43,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:49:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:49:43,740 INFO L87 Difference]: Start difference. First operand 218 states and 281 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:46,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:49:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:48,391 INFO L93 Difference]: Finished difference Result 551 states and 718 transitions. [2021-11-25 17:49:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:49:48,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-25 17:49:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:48,396 INFO L225 Difference]: With dead ends: 551 [2021-11-25 17:49:48,396 INFO L226 Difference]: Without dead ends: 335 [2021-11-25 17:49:48,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:48,398 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 147 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:48,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 751 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-25 17:49:48,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-25 17:49:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 325. [2021-11-25 17:49:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 304 states have (on average 1.3092105263157894) internal successors, (398), 309 states have internal predecessors, (398), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 17:49:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 423 transitions. [2021-11-25 17:49:48,425 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 423 transitions. Word has length 10 [2021-11-25 17:49:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:48,425 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 423 transitions. [2021-11-25 17:49:48,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:48,426 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 423 transitions. [2021-11-25 17:49:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 17:49:48,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:48,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:48,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:48,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:49:48,646 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:48,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1199048252, now seen corresponding path program 1 times [2021-11-25 17:49:48,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:49:48,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456671877] [2021-11-25 17:49:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:48,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:49:48,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:49:48,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:49:48,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 17:49:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:49:48,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:48,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:48,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:48,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:48,971 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-25 17:49:48,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 17:49:49,041 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 17:49:49,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-25 17:49:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:49,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:49,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:49:49,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456671877] [2021-11-25 17:49:49,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456671877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:49,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:49,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:49,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744423191] [2021-11-25 17:49:49,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:49,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:49:49,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:49:49,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:49:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:49:49,082 INFO L87 Difference]: Start difference. First operand 325 states and 423 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:51,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:49:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:54,152 INFO L93 Difference]: Finished difference Result 595 states and 779 transitions. [2021-11-25 17:49:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:49:54,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 17:49:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:54,157 INFO L225 Difference]: With dead ends: 595 [2021-11-25 17:49:54,157 INFO L226 Difference]: Without dead ends: 421 [2021-11-25 17:49:54,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:54,159 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 152 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:54,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 711 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-25 17:49:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-25 17:49:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 324. [2021-11-25 17:49:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 303 states have (on average 1.306930693069307) internal successors, (396), 308 states have internal predecessors, (396), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 17:49:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 421 transitions. [2021-11-25 17:49:54,192 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 421 transitions. Word has length 13 [2021-11-25 17:49:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:54,193 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 421 transitions. [2021-11-25 17:49:54,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 421 transitions. [2021-11-25 17:49:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 17:49:54,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:54,195 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] [2021-11-25 17:49:54,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:54,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:49:54,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:54,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:54,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1082818915, now seen corresponding path program 1 times [2021-11-25 17:49:54,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:49:54,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931955331] [2021-11-25 17:49:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:54,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:49:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:49:54,413 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:49:54,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 17:49:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 17:49:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:54,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:54,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:49:54,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931955331] [2021-11-25 17:49:54,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931955331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:54,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:54,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:54,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644821937] [2021-11-25 17:49:54,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:54,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:49:54,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:49:54,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:49:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:49:54,884 INFO L87 Difference]: Start difference. First operand 324 states and 421 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:55,014 INFO L93 Difference]: Finished difference Result 646 states and 846 transitions. [2021-11-25 17:49:55,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:49:55,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-25 17:49:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:55,023 INFO L225 Difference]: With dead ends: 646 [2021-11-25 17:49:55,025 INFO L226 Difference]: Without dead ends: 332 [2021-11-25 17:49:55,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:55,028 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 220 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:55,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 552 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:55,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-25 17:49:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2021-11-25 17:49:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 309 states have (on average 1.249190938511327) internal successors, (386), 314 states have internal predecessors, (386), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 17:49:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 411 transitions. [2021-11-25 17:49:55,060 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 411 transitions. Word has length 47 [2021-11-25 17:49:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:55,061 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 411 transitions. [2021-11-25 17:49:55,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 411 transitions. [2021-11-25 17:49:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 17:49:55,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:55,066 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] [2021-11-25 17:49:55,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:55,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:49:55,282 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:55,283 INFO L85 PathProgramCache]: Analyzing trace with hash 206381993, now seen corresponding path program 1 times [2021-11-25 17:49:55,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:49:55,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295135497] [2021-11-25 17:49:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:55,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:49:55,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:49:55,285 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:49:55,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 17:49:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:55,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:49:55,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:55,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:55,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:49:55,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295135497] [2021-11-25 17:49:55,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295135497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:55,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:55,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:49:55,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354893998] [2021-11-25 17:49:55,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:55,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:49:55,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:49:55,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:49:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:49:55,697 INFO L87 Difference]: Start difference. First operand 330 states and 411 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:55,802 INFO L93 Difference]: Finished difference Result 342 states and 423 transitions. [2021-11-25 17:49:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:49:55,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-25 17:49:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:55,805 INFO L225 Difference]: With dead ends: 342 [2021-11-25 17:49:55,805 INFO L226 Difference]: Without dead ends: 340 [2021-11-25 17:49:55,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:49:55,807 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 13 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:55,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1319 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-25 17:49:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2021-11-25 17:49:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 316 states have (on average 1.2468354430379747) internal successors, (394), 322 states have internal predecessors, (394), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 17:49:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 421 transitions. [2021-11-25 17:49:55,825 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 421 transitions. Word has length 47 [2021-11-25 17:49:55,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:55,825 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 421 transitions. [2021-11-25 17:49:55,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 421 transitions. [2021-11-25 17:49:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 17:49:55,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:55,827 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 17:49:55,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-25 17:49:56,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:49:56,046 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:56,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1298801861, now seen corresponding path program 1 times [2021-11-25 17:49:56,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:49:56,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898515729] [2021-11-25 17:49:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:56,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:49:56,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:49:56,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:49:56,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 17:49:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:49:56,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:56,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:56,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:49:56,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898515729] [2021-11-25 17:49:56,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898515729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:56,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:56,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:49:56,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170747684] [2021-11-25 17:49:56,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:56,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:49:56,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:49:56,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:49:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:49:56,751 INFO L87 Difference]: Start difference. First operand 340 states and 421 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 17:49:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:57,007 INFO L93 Difference]: Finished difference Result 642 states and 803 transitions. [2021-11-25 17:49:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:49:57,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2021-11-25 17:49:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:57,012 INFO L225 Difference]: With dead ends: 642 [2021-11-25 17:49:57,012 INFO L226 Difference]: Without dead ends: 348 [2021-11-25 17:49:57,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:49:57,013 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 21 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:57,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1206 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:49:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-25 17:49:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2021-11-25 17:49:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 318 states have (on average 1.2452830188679245) internal successors, (396), 325 states have internal predecessors, (396), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-25 17:49:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 426 transitions. [2021-11-25 17:49:57,035 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 426 transitions. Word has length 62 [2021-11-25 17:49:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:57,037 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 426 transitions. [2021-11-25 17:49:57,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 17:49:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 426 transitions. [2021-11-25 17:49:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 17:49:57,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:57,042 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 17:49:57,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:57,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:49:57,262 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2017357497, now seen corresponding path program 1 times [2021-11-25 17:49:57,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:49:57,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974226241] [2021-11-25 17:49:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:57,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:49:57,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:49:57,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:49:57,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 17:49:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:57,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:49:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:57,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:57,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:49:57,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974226241] [2021-11-25 17:49:57,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974226241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:57,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:57,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:57,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706423853] [2021-11-25 17:49:57,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:57,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:49:57,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:49:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:49:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:49:57,886 INFO L87 Difference]: Start difference. First operand 344 states and 426 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 17:49:57,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:57,948 INFO L93 Difference]: Finished difference Result 645 states and 807 transitions. [2021-11-25 17:49:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:49:57,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2021-11-25 17:49:57,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:57,952 INFO L225 Difference]: With dead ends: 645 [2021-11-25 17:49:57,952 INFO L226 Difference]: Without dead ends: 348 [2021-11-25 17:49:57,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:57,954 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 3 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:57,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 794 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:49:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-25 17:49:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2021-11-25 17:49:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 321 states have (on average 1.2461059190031152) internal successors, (400), 329 states have internal predecessors, (400), 15 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-25 17:49:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 431 transitions. [2021-11-25 17:49:57,973 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 431 transitions. Word has length 67 [2021-11-25 17:49:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:57,973 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 431 transitions. [2021-11-25 17:49:57,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 17:49:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 431 transitions. [2021-11-25 17:49:57,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 17:49:57,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:57,975 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 17:49:57,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:58,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:49:58,192 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:49:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1833215856, now seen corresponding path program 1 times [2021-11-25 17:49:58,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:49:58,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247202742] [2021-11-25 17:49:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:58,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:49:58,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:49:58,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:49:58,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 17:49:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:58,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:49:58,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:58,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:59,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:49:59,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247202742] [2021-11-25 17:49:59,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247202742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:59,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1804715797] [2021-11-25 17:49:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:59,129 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:49:59,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:49:59,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:49:59,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-25 17:49:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:59,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:49:59,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:49:59,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:50:00,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1804715797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:00,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211963525] [2021-11-25 17:50:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:00,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:00,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:00,375 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:00,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 17:50:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:00,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:50:00,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:50:00,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:00,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211963525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:00,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-25 17:50:00,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 7, 7] total 18 [2021-11-25 17:50:00,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105510381] [2021-11-25 17:50:00,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:00,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:50:00,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:50:00,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:50:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-25 17:50:00,948 INFO L87 Difference]: Start difference. First operand 348 states and 431 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 17:50:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:01,208 INFO L93 Difference]: Finished difference Result 1212 states and 1532 transitions. [2021-11-25 17:50:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:50:01,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2021-11-25 17:50:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:01,216 INFO L225 Difference]: With dead ends: 1212 [2021-11-25 17:50:01,216 INFO L226 Difference]: Without dead ends: 911 [2021-11-25 17:50:01,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-25 17:50:01,218 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 489 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:01,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 1438 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:50:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-11-25 17:50:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 858. [2021-11-25 17:50:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 808 states have (on average 1.2648514851485149) internal successors, (1022), 819 states have internal predecessors, (1022), 29 states have call successors, (29), 12 states have call predecessors, (29), 17 states have return successors, (33), 26 states have call predecessors, (33), 27 states have call successors, (33) [2021-11-25 17:50:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1084 transitions. [2021-11-25 17:50:01,274 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1084 transitions. Word has length 68 [2021-11-25 17:50:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:01,274 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 1084 transitions. [2021-11-25 17:50:01,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 17:50:01,277 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1084 transitions. [2021-11-25 17:50:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:50:01,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:01,283 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 17:50:01,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:01,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:01,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:01,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:01,900 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:50:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2100618219, now seen corresponding path program 1 times [2021-11-25 17:50:01,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:50:01,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051105055] [2021-11-25 17:50:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:01,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:50:01,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:50:01,904 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:50:01,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 17:50:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:02,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:50:02,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:50:02,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 17:50:03,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:50:03,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051105055] [2021-11-25 17:50:03,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051105055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:03,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1939988322] [2021-11-25 17:50:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:03,189 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:50:03,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:50:03,200 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:50:03,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-25 17:50:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:03,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:50:03,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 17:50:04,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:04,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1939988322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:04,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 17:50:04,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2021-11-25 17:50:04,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591476669] [2021-11-25 17:50:04,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:04,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:04,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:50:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:50:04,055 INFO L87 Difference]: Start difference. First operand 858 states and 1084 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 17:50:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:04,116 INFO L93 Difference]: Finished difference Result 1672 states and 2122 transitions. [2021-11-25 17:50:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:04,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 95 [2021-11-25 17:50:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:04,122 INFO L225 Difference]: With dead ends: 1672 [2021-11-25 17:50:04,123 INFO L226 Difference]: Without dead ends: 861 [2021-11-25 17:50:04,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:50:04,125 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 0 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 533 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 [2021-11-25 17:50:04,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 533 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:50:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-11-25 17:50:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2021-11-25 17:50:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 811 states have (on average 1.2638717632552405) internal successors, (1025), 822 states have internal predecessors, (1025), 29 states have call successors, (29), 12 states have call predecessors, (29), 17 states have return successors, (33), 26 states have call predecessors, (33), 27 states have call successors, (33) [2021-11-25 17:50:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1087 transitions. [2021-11-25 17:50:04,165 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1087 transitions. Word has length 95 [2021-11-25 17:50:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:04,166 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1087 transitions. [2021-11-25 17:50:04,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 17:50:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1087 transitions. [2021-11-25 17:50:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:50:04,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:04,168 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 17:50:04,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:04,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:04,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:50:04,573 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:50:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:04,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1707591209, now seen corresponding path program 1 times [2021-11-25 17:50:04,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:50:04,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139820344] [2021-11-25 17:50:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:04,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:50:04,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:50:04,580 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:50:04,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 17:50:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:05,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:50:05,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:50:05,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 17:50:05,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:50:05,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139820344] [2021-11-25 17:50:05,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139820344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:05,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [12150226] [2021-11-25 17:50:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:05,735 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:50:05,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:50:05,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:50:05,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-25 17:50:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:06,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 17:50:06,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 17:50:06,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 17:50:07,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [12150226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:07,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035945741] [2021-11-25 17:50:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:07,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:07,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:07,480 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:07,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 17:50:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:08,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 17:50:08,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 17:50:08,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 17:50:08,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035945741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:08,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:50:08,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 10, 8, 7] total 23 [2021-11-25 17:50:08,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034734888] [2021-11-25 17:50:08,699 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:08,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 17:50:08,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:50:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 17:50:08,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-11-25 17:50:08,701 INFO L87 Difference]: Start difference. First operand 861 states and 1087 transitions. Second operand has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 20 states have internal predecessors, (243), 11 states have call successors, (23), 8 states have call predecessors, (23), 11 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-25 17:50:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:16,101 INFO L93 Difference]: Finished difference Result 5146 states and 6619 transitions. [2021-11-25 17:50:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-25 17:50:16,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 20 states have internal predecessors, (243), 11 states have call successors, (23), 8 states have call predecessors, (23), 11 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) Word has length 95 [2021-11-25 17:50:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:16,127 INFO L225 Difference]: With dead ends: 5146 [2021-11-25 17:50:16,127 INFO L226 Difference]: Without dead ends: 4332 [2021-11-25 17:50:16,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2724, Invalid=10158, Unknown=0, NotChecked=0, Total=12882 [2021-11-25 17:50:16,136 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 7111 mSDsluCounter, 11739 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 880 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7145 SdHoareTripleChecker+Valid, 12723 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 880 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:16,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7145 Valid, 12723 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [880 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 17:50:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-11-25 17:50:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 2796. [2021-11-25 17:50:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2673 states have (on average 1.2772166105499438) internal successors, (3414), 2691 states have internal predecessors, (3414), 72 states have call successors, (72), 42 states have call predecessors, (72), 47 states have return successors, (80), 62 states have call predecessors, (80), 70 states have call successors, (80) [2021-11-25 17:50:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 3566 transitions. [2021-11-25 17:50:16,304 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 3566 transitions. Word has length 95 [2021-11-25 17:50:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:16,305 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 3566 transitions. [2021-11-25 17:50:16,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 20 states have internal predecessors, (243), 11 states have call successors, (23), 8 states have call predecessors, (23), 11 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-25 17:50:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 3566 transitions. [2021-11-25 17:50:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-25 17:50:16,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:16,309 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-25 17:50:16,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:16,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:16,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-25 17:50:16,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:16,928 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:50:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash 197394771, now seen corresponding path program 1 times [2021-11-25 17:50:16,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:50:16,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653700505] [2021-11-25 17:50:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:16,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:50:16,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:50:16,930 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:50:16,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 17:50:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:17,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:50:17,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:50:17,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 17:50:18,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:50:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653700505] [2021-11-25 17:50:18,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653700505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1781760857] [2021-11-25 17:50:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:18,460 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:50:18,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:50:18,461 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:50:18,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 17:50:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:19,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:50:19,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:50:19,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 17:50:20,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1781760857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:20,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517788683] [2021-11-25 17:50:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:20,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:20,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:20,092 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:20,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 17:50:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:20,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:50:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:20,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:20,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:20,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:20,963 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-25 17:50:20,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 17:50:21,048 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 17:50:21,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-25 17:50:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 17:50:21,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:21,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517788683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:21,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-25 17:50:21,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 8, 8, 8] total 16 [2021-11-25 17:50:21,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055263818] [2021-11-25 17:50:21,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:21,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:50:21,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:50:21,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:50:21,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-25 17:50:21,086 INFO L87 Difference]: Start difference. First operand 2796 states and 3566 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 17:50:24,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:50:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:27,428 INFO L93 Difference]: Finished difference Result 3579 states and 4645 transitions. [2021-11-25 17:50:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:50:27,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 104 [2021-11-25 17:50:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:27,447 INFO L225 Difference]: With dead ends: 3579 [2021-11-25 17:50:27,447 INFO L226 Difference]: Without dead ends: 3557 [2021-11-25 17:50:27,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:50:27,450 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 136 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:27,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 687 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2021-11-25 17:50:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-11-25 17:50:27,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2814. [2021-11-25 17:50:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2691 states have (on average 1.2753623188405796) internal successors, (3432), 2709 states have internal predecessors, (3432), 72 states have call successors, (72), 42 states have call predecessors, (72), 47 states have return successors, (80), 62 states have call predecessors, (80), 70 states have call successors, (80) [2021-11-25 17:50:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 3584 transitions. [2021-11-25 17:50:27,603 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 3584 transitions. Word has length 104 [2021-11-25 17:50:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:27,604 INFO L470 AbstractCegarLoop]: Abstraction has 2814 states and 3584 transitions. [2021-11-25 17:50:27,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 17:50:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 3584 transitions. [2021-11-25 17:50:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 17:50:27,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:27,606 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 17:50:27,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:27,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-25 17:50:28,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-25 17:50:28,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 17:50:28,232 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:50:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2135958996, now seen corresponding path program 1 times [2021-11-25 17:50:28,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:50:28,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397901484] [2021-11-25 17:50:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:28,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:50:28,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:50:28,234 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:50:28,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 17:50:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:29,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:50:29,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 17:50:29,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 17:50:29,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:50:29,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397901484] [2021-11-25 17:50:29,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397901484] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:29,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2047456811] [2021-11-25 17:50:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:29,855 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:50:29,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:50:29,855 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:50:29,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-25 17:50:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:50:31,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 17:50:31,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 17:50:31,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2047456811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:31,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817935011] [2021-11-25 17:50:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:31,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:31,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:31,652 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:31,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 17:50:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:50:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:50:32,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 17:50:33,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817935011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:33,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:50:33,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-25 17:50:33,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129004610] [2021-11-25 17:50:33,052 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:33,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 17:50:33,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:50:33,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 17:50:33,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-25 17:50:33,055 INFO L87 Difference]: Start difference. First operand 2814 states and 3584 transitions. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 17:50:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:34,464 INFO L93 Difference]: Finished difference Result 5813 states and 7461 transitions. [2021-11-25 17:50:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 17:50:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 116 [2021-11-25 17:50:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:34,481 INFO L225 Difference]: With dead ends: 5813 [2021-11-25 17:50:34,481 INFO L226 Difference]: Without dead ends: 2982 [2021-11-25 17:50:34,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 672 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 17:50:34,488 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 178 mSDsluCounter, 2406 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 2678 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:34,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 2678 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-11-25 17:50:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2898. [2021-11-25 17:50:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2775 states have (on average 1.2771171171171172) internal successors, (3544), 2793 states have internal predecessors, (3544), 72 states have call successors, (72), 42 states have call predecessors, (72), 47 states have return successors, (80), 62 states have call predecessors, (80), 70 states have call successors, (80) [2021-11-25 17:50:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 3696 transitions. [2021-11-25 17:50:34,649 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 3696 transitions. Word has length 116 [2021-11-25 17:50:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:34,649 INFO L470 AbstractCegarLoop]: Abstraction has 2898 states and 3696 transitions. [2021-11-25 17:50:34,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 17:50:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 3696 transitions. [2021-11-25 17:50:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 17:50:34,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:34,652 INFO L514 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 17:50:34,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:34,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:35,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-25 17:50:35,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 17:50:35,272 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:50:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1661117524, now seen corresponding path program 2 times [2021-11-25 17:50:35,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:50:35,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604302925] [2021-11-25 17:50:35,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:50:35,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:50:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:50:35,274 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:50:35,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 17:50:37,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:50:37,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:50:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 17:50:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 128 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-25 17:50:37,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-25 17:50:38,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:50:38,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604302925] [2021-11-25 17:50:38,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604302925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:38,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1691899646] [2021-11-25 17:50:38,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:50:38,845 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:50:38,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:50:38,846 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:50:38,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 17:50:49,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:50:49,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:50:49,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 17:50:49,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 128 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-25 17:50:49,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-25 17:50:49,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1691899646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:49,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913732490] [2021-11-25 17:50:49,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:50:49,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:49,933 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:49,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d1992b-f282-4339-b9f5-7826137deb12/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process