./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/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 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:37:15,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:37:15,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:37:15,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:37:15,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:37:15,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:37:15,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:37:15,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:37:15,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:37:15,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:37:15,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:37:15,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:37:15,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:37:15,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:37:15,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:37:15,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:37:15,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:37:15,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:37:15,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:37:15,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:37:15,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:37:15,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:37:15,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:37:15,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:37:15,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:37:15,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:37:15,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:37:15,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:37:15,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:37:15,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:37:15,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:37:15,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:37:15,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:37:15,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:37:15,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:37:15,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:37:15,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:37:15,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:37:15,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:37:15,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:37:15,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:37:15,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:37:15,235 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:37:15,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:37:15,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:37:15,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:37:15,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:37:15,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:37:15,244 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:37:15,245 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:37:15,245 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:37:15,245 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:37:15,246 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:37:15,247 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:37:15,247 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:37:15,247 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:37:15,247 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:37:15,248 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:37:15,248 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:37:15,248 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:37:15,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:37:15,250 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:37:15,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:37:15,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:37:15,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:37:15,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:37:15,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:37:15,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:37:15,253 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:37:15,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:37:15,253 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:37:15,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:37:15,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:37:15,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:37:15,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:37:15,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:37:15,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:37:15,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:37:15,256 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:37:15,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:37:15,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:37:15,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:37:15,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:37:15,257 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 [2021-11-25 18:37:15,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:37:15,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:37:15,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:37:15,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:37:15,531 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:37:15,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-25 18:37:15,596 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/data/1f9b06930/f36cd541af934e3585b0eeb2f1370563/FLAG0a7086678 [2021-11-25 18:37:16,272 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:37:16,273 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-25 18:37:16,314 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/data/1f9b06930/f36cd541af934e3585b0eeb2f1370563/FLAG0a7086678 [2021-11-25 18:37:16,431 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/data/1f9b06930/f36cd541af934e3585b0eeb2f1370563 [2021-11-25 18:37:16,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:37:16,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:37:16,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:37:16,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:37:16,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:37:16,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:37:16" (1/1) ... [2021-11-25 18:37:16,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c8d9aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:16, skipping insertion in model container [2021-11-25 18:37:16,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:37:16" (1/1) ... [2021-11-25 18:37:16,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:37:16,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:37:17,243 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-25 18:37:17,265 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-25 18:37:17,430 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-25 18:37:17,433 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-25 18:37:17,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:17,456 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:37:17,497 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-25 18:37:17,504 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-25 18:37:17,577 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-25 18:37:17,578 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-25 18:37:17,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:17,712 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:37:17,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17 WrapperNode [2021-11-25 18:37:17,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:37:17,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:37:17,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:37:17,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:37:17,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (1/1) ... [2021-11-25 18:37:17,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (1/1) ... [2021-11-25 18:37:17,835 INFO L137 Inliner]: procedures = 282, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1040 [2021-11-25 18:37:17,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:37:17,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:37:17,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:37:17,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:37:17,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (1/1) ... [2021-11-25 18:37:17,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (1/1) ... [2021-11-25 18:37:17,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (1/1) ... [2021-11-25 18:37:17,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (1/1) ... [2021-11-25 18:37:17,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (1/1) ... [2021-11-25 18:37:17,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (1/1) ... [2021-11-25 18:37:17,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (1/1) ... [2021-11-25 18:37:18,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:37:18,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:37:18,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:37:18,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:37:18,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (1/1) ... [2021-11-25 18:37:18,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:37:18,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:18,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:37:18,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:37:18,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:37:18,115 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 18:37:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:37:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:37:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-25 18:37:18,116 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-25 18:37:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:37:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:37:18,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:37:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:37:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:37:18,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:37:18,117 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-25 18:37:18,117 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-25 18:37:18,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:37:18,117 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-25 18:37:18,117 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-25 18:37:18,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:37:18,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:37:18,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:37:18,390 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:37:18,403 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:37:19,248 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:37:19,569 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:37:19,570 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-25 18:37:19,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:37:19 BoogieIcfgContainer [2021-11-25 18:37:19,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:37:19,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:37:19,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:37:19,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:37:19,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:37:16" (1/3) ... [2021-11-25 18:37:19,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6907b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:37:19, skipping insertion in model container [2021-11-25 18:37:19,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:17" (2/3) ... [2021-11-25 18:37:19,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6907b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:37:19, skipping insertion in model container [2021-11-25 18:37:19,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:37:19" (3/3) ... [2021-11-25 18:37:19,583 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test6-1.i [2021-11-25 18:37:19,595 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:37:19,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 18:37:19,657 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:37:19,670 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 18:37:19,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 18:37:19,695 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 18:37:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:37:19,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:19,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:19,702 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 18:37:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash 898140550, now seen corresponding path program 1 times [2021-11-25 18:37:19,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:19,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244033053] [2021-11-25 18:37:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:19,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:19,899 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 18:37:19,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:19,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244033053] [2021-11-25 18:37:19,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244033053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:19,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:37:19,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:37:19,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247721026] [2021-11-25 18:37:19,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:19,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:37:19,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:19,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:37:19,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:37:19,941 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 18:37:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:20,689 INFO L93 Difference]: Finished difference Result 281 states and 474 transitions. [2021-11-25 18:37:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:37:20,694 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 18:37:20,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:20,704 INFO L225 Difference]: With dead ends: 281 [2021-11-25 18:37:20,704 INFO L226 Difference]: Without dead ends: 138 [2021-11-25 18:37:20,707 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 18:37:20,711 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 18:37:20,712 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 18:37:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-25 18:37:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-11-25 18:37:20,759 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 18:37:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 164 transitions. [2021-11-25 18:37:20,763 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 164 transitions. Word has length 7 [2021-11-25 18:37:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:20,763 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 164 transitions. [2021-11-25 18:37:20,763 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 18:37:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 164 transitions. [2021-11-25 18:37:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:37:20,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:20,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:20,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:37:20,765 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 18:37:20,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:20,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1458001887, now seen corresponding path program 1 times [2021-11-25 18:37:20,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:20,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418272500] [2021-11-25 18:37:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:20,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:20,842 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:20,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418272500] [2021-11-25 18:37:20,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418272500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:20,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:37:20,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:37:20,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686745205] [2021-11-25 18:37:20,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:20,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:37:20,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:37:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:37:20,846 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 18:37:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:22,483 INFO L93 Difference]: Finished difference Result 276 states and 329 transitions. [2021-11-25 18:37:22,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:37:22,489 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 18:37:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:22,492 INFO L225 Difference]: With dead ends: 276 [2021-11-25 18:37:22,492 INFO L226 Difference]: Without dead ends: 203 [2021-11-25 18:37:22,493 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 18:37:22,495 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 66 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:22,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 392 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 18:37:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-25 18:37:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 140. [2021-11-25 18:37:22,516 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 18:37:22,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2021-11-25 18:37:22,518 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 9 [2021-11-25 18:37:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:22,519 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2021-11-25 18:37:22,519 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 18:37:22,519 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2021-11-25 18:37:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:37:22,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:22,520 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 18:37:22,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:37:22,521 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 18:37:22,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:22,526 INFO L85 PathProgramCache]: Analyzing trace with hash 496803015, now seen corresponding path program 1 times [2021-11-25 18:37:22,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:22,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031922583] [2021-11-25 18:37:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:22,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:22,589 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:37:22,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117917155] [2021-11-25 18:37:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:22,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:22,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:22,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:22,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:37:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:22,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:37:22,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:23,073 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 18:37:23,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:37:23,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:23,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031922583] [2021-11-25 18:37:23,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:37:23,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117917155] [2021-11-25 18:37:23,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117917155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:23,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:37:23,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:37:23,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061030430] [2021-11-25 18:37:23,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:23,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:37:23,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:23,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:37:23,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:37:23,077 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 18:37:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:24,969 INFO L93 Difference]: Finished difference Result 151 states and 177 transitions. [2021-11-25 18:37:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:37:24,969 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 18:37:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:24,971 INFO L225 Difference]: With dead ends: 151 [2021-11-25 18:37:24,972 INFO L226 Difference]: Without dead ends: 149 [2021-11-25 18:37:24,972 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 18:37:24,974 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 11 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:24,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 688 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 18:37:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-25 18:37:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-25 18:37:24,988 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 18:37:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2021-11-25 18:37:24,990 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 20 [2021-11-25 18:37:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:24,991 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2021-11-25 18:37:24,991 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 18:37:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2021-11-25 18:37:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:37:24,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:24,993 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 18:37:25,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:25,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:25,215 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 18:37:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:25,215 INFO L85 PathProgramCache]: Analyzing trace with hash 785813656, now seen corresponding path program 1 times [2021-11-25 18:37:25,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:25,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465170817] [2021-11-25 18:37:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:25,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:25,357 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:37:25,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436633328] [2021-11-25 18:37:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:25,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:25,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:25,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:25,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:37:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:25,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:37:25,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:26,151 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 18:37:26,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:37:26,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:26,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465170817] [2021-11-25 18:37:26,156 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:37:26,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436633328] [2021-11-25 18:37:26,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436633328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:26,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:37:26,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:37:26,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831556308] [2021-11-25 18:37:26,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:26,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:37:26,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:26,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:37:26,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:37:26,161 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 18:37:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:27,667 INFO L93 Difference]: Finished difference Result 352 states and 415 transitions. [2021-11-25 18:37:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:37:27,671 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 18:37:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:27,673 INFO L225 Difference]: With dead ends: 352 [2021-11-25 18:37:27,673 INFO L226 Difference]: Without dead ends: 206 [2021-11-25 18:37:27,674 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 18:37:27,675 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 52 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:27,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 276 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 18:37:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-25 18:37:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 192. [2021-11-25 18:37:27,693 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 18:37:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 224 transitions. [2021-11-25 18:37:27,695 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 224 transitions. Word has length 28 [2021-11-25 18:37:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:27,695 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 224 transitions. [2021-11-25 18:37:27,695 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 18:37:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 224 transitions. [2021-11-25 18:37:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 18:37:27,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:27,697 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 18:37:27,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:27,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:27,914 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 18:37:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:27,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1058406850, now seen corresponding path program 1 times [2021-11-25 18:37:27,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:27,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389866941] [2021-11-25 18:37:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:27,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:27,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:37:27,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371381825] [2021-11-25 18:37:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:27,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:27,957 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:27,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:37:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:37:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:28,502 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 18:37:28,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:28,677 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 18:37:28,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:28,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389866941] [2021-11-25 18:37:28,679 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:37:28,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371381825] [2021-11-25 18:37:28,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371381825] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:28,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:37:28,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2021-11-25 18:37:28,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869036253] [2021-11-25 18:37:28,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:28,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:37:28,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:28,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:37:28,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:37:28,682 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 18:37:30,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 18:37:30,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:30,562 INFO L93 Difference]: Finished difference Result 710 states and 839 transitions. [2021-11-25 18:37:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:37:30,563 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 18:37:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:30,568 INFO L225 Difference]: With dead ends: 710 [2021-11-25 18:37:30,568 INFO L226 Difference]: Without dead ends: 534 [2021-11-25 18:37:30,569 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 18:37:30,570 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 699 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:30,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 416 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 18:37:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-25 18:37:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 312. [2021-11-25 18:37:30,603 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 18:37:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 365 transitions. [2021-11-25 18:37:30,606 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 365 transitions. Word has length 32 [2021-11-25 18:37:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:30,606 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 365 transitions. [2021-11-25 18:37:30,606 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 18:37:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 365 transitions. [2021-11-25 18:37:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 18:37:30,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:30,609 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 18:37:30,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:30,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:30,832 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 18:37:30,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:30,833 INFO L85 PathProgramCache]: Analyzing trace with hash 229369108, now seen corresponding path program 1 times [2021-11-25 18:37:30,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:30,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937336397] [2021-11-25 18:37:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:30,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:30,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:37:30,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644178907] [2021-11-25 18:37:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:30,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:30,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:30,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:30,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:37:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:37:31,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:31,570 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 18:37:31,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:37:31,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:31,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937336397] [2021-11-25 18:37:31,570 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:37:31,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644178907] [2021-11-25 18:37:31,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644178907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:31,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:37:31,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:37:31,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402162187] [2021-11-25 18:37:31,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:31,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:37:31,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:37:31,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:37:31,573 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 18:37:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:33,615 INFO L93 Difference]: Finished difference Result 592 states and 694 transitions. [2021-11-25 18:37:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:37:33,620 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 18:37:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:33,622 INFO L225 Difference]: With dead ends: 592 [2021-11-25 18:37:33,622 INFO L226 Difference]: Without dead ends: 312 [2021-11-25 18:37:33,623 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 18:37:33,624 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 17 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:33,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 480 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 18:37:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-25 18:37:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-11-25 18:37:33,641 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 18:37:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 364 transitions. [2021-11-25 18:37:33,643 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 364 transitions. Word has length 57 [2021-11-25 18:37:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:33,644 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 364 transitions. [2021-11-25 18:37:33,644 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 18:37:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 364 transitions. [2021-11-25 18:37:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 18:37:33,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:33,647 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 18:37:33,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:33,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:37:33,863 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 18:37:33,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:33,863 INFO L85 PathProgramCache]: Analyzing trace with hash 378165262, now seen corresponding path program 1 times [2021-11-25 18:37:33,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:33,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624843385] [2021-11-25 18:37:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:33,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:33,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:37:33,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797767219] [2021-11-25 18:37:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:33,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:33,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:33,939 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:33,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:37:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:34,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:37:34,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:34,528 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 18:37:34,541 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 18:37:34,552 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 18:37:34,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:37:34,552 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624843385] [2021-11-25 18:37:34,552 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:37:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797767219] [2021-11-25 18:37:34,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797767219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:34,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:37:34,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:37:34,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841680804] [2021-11-25 18:37:34,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:34,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:37:34,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:37:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:37:34,555 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 18:37:37,153 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 18:37:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:37,442 INFO L93 Difference]: Finished difference Result 415 states and 494 transitions. [2021-11-25 18:37:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:37:37,446 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 18:37:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:37,450 INFO L225 Difference]: With dead ends: 415 [2021-11-25 18:37:37,450 INFO L226 Difference]: Without dead ends: 402 [2021-11-25 18:37:37,451 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 18:37:37,452 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 48 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s 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, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:37,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 387 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 18:37:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-25 18:37:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 316. [2021-11-25 18:37:37,476 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 18:37:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 368 transitions. [2021-11-25 18:37:37,480 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 368 transitions. Word has length 62 [2021-11-25 18:37:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:37,482 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 368 transitions. [2021-11-25 18:37:37,483 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 18:37:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 368 transitions. [2021-11-25 18:37:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 18:37:37,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:37,492 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 18:37:37,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:37,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:37,701 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 18:37:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:37,701 INFO L85 PathProgramCache]: Analyzing trace with hash -867645780, now seen corresponding path program 1 times [2021-11-25 18:37:37,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:37,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575017091] [2021-11-25 18:37:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:37,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:37,804 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:37:37,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450853162] [2021-11-25 18:37:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:37,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:37,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:37,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:37,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:37:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:37:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:38,704 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 18:37:38,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:37:38,705 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575017091] [2021-11-25 18:37:38,705 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:37:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450853162] [2021-11-25 18:37:38,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450853162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:38,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:37:38,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:37:38,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95465553] [2021-11-25 18:37:38,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:38,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:37:38,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:37:38,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:37:38,707 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 18:37:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:43,368 INFO L93 Difference]: Finished difference Result 604 states and 709 transitions. [2021-11-25 18:37:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:37:43,373 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 18:37:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:43,376 INFO L225 Difference]: With dead ends: 604 [2021-11-25 18:37:43,376 INFO L226 Difference]: Without dead ends: 319 [2021-11-25 18:37:43,377 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 18:37:43,378 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 14 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s 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, 4.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:43,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 889 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-25 18:37:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-25 18:37:43,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-11-25 18:37:43,402 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 18:37:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 372 transitions. [2021-11-25 18:37:43,411 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 372 transitions. Word has length 69 [2021-11-25 18:37:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:43,412 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 372 transitions. [2021-11-25 18:37:43,412 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 18:37:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 372 transitions. [2021-11-25 18:37:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 18:37:43,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:43,417 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 18:37:43,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:43,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:43,622 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 18:37:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1536874878, now seen corresponding path program 1 times [2021-11-25 18:37:43,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:43,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698083409] [2021-11-25 18:37:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:43,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:43,694 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:37:43,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956288625] [2021-11-25 18:37:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:43,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:43,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:43,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:43,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:37:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 18:37:45,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:46,160 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 18:37:46,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:46,414 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 18:37:46,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:46,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698083409] [2021-11-25 18:37:46,415 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:37:46,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956288625] [2021-11-25 18:37:46,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956288625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:46,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752035001] [2021-11-25 18:37:46,436 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2021-11-25 18:37:46,436 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:46,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:46,445 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:46,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:46,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:46,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:46,557 INFO L354 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2021-11-25 18:37:46,557 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 18:37:46,568 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 18:37:46,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:46,587 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 18:37:46,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:46,620 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 18:37:46,628 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 18:37:46,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:46,674 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:37:46,674 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 18:37:46,689 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 18:37:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:46,704 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 18:37:46,717 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 18:37:46,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:46,781 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 18:37:46,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:46,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:46,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:46,847 INFO L354 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2021-11-25 18:37:46,848 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 18:37:46,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:46,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:46,877 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 18:37:46,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:37:47,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:47,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:47,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:47,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:47,013 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 18:37:47,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:47,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:47,184 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 18:37:47,184 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 18:37:47,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:47,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:47,217 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 18:37:47,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:47,248 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 18:37:48,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,095 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 18:37:48,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,122 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 18:37:48,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,158 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 18:37:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,185 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 18:37:48,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:37:48,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:37:48,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,349 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 18:37:48,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,511 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 18:37:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,537 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 18:37:48,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:48,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:48,792 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 18:37:48,795 INFO L158 Benchmark]: Toolchain (without parser) took 32359.24ms. Allocated memory was 102.8MB in the beginning and 232.8MB in the end (delta: 130.0MB). Free memory was 68.4MB in the beginning and 63.6MB in the end (delta: 4.8MB). Peak memory consumption was 135.0MB. Max. memory is 16.1GB. [2021-11-25 18:37:48,795 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 102.8MB. Free memory was 57.6MB in the beginning and 57.6MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:37:48,796 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1272.99ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 68.2MB in the beginning and 93.4MB in the end (delta: -25.2MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. [2021-11-25 18:37:48,796 INFO L158 Benchmark]: Boogie Procedure Inliner took 122.01ms. Allocated memory is still 123.7MB. Free memory was 93.4MB in the beginning and 86.5MB in the end (delta: 6.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:37:48,796 INFO L158 Benchmark]: Boogie Preprocessor took 186.94ms. Allocated memory is still 123.7MB. Free memory was 86.5MB in the beginning and 78.8MB in the end (delta: 7.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:37:48,796 INFO L158 Benchmark]: RCFGBuilder took 1549.02ms. Allocated memory is still 123.7MB. Free memory was 78.8MB in the beginning and 78.7MB in the end (delta: 71.6kB). Peak memory consumption was 45.9MB. Max. memory is 16.1GB. [2021-11-25 18:37:48,797 INFO L158 Benchmark]: TraceAbstraction took 29219.64ms. Allocated memory was 123.7MB in the beginning and 232.8MB in the end (delta: 109.1MB). Free memory was 78.2MB in the beginning and 63.6MB in the end (delta: 14.6MB). Peak memory consumption was 125.5MB. Max. memory is 16.1GB. [2021-11-25 18:37:48,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 102.8MB. Free memory was 57.6MB in the beginning and 57.6MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1272.99ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 68.2MB in the beginning and 93.4MB in the end (delta: -25.2MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 122.01ms. Allocated memory is still 123.7MB. Free memory was 93.4MB in the beginning and 86.5MB in the end (delta: 6.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 186.94ms. Allocated memory is still 123.7MB. Free memory was 86.5MB in the beginning and 78.8MB in the end (delta: 7.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 1549.02ms. Allocated memory is still 123.7MB. Free memory was 78.8MB in the beginning and 78.7MB in the end (delta: 71.6kB). Peak memory consumption was 45.9MB. Max. memory is 16.1GB. * TraceAbstraction took 29219.64ms. Allocated memory was 123.7MB in the beginning and 232.8MB in the end (delta: 109.1MB). Free memory was 78.2MB in the beginning and 63.6MB in the end (delta: 14.6MB). Peak memory consumption was 125.5MB. 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 18:37:48,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/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 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:37:51,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:37:51,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:37:51,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:37:51,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:37:51,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:37:51,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:37:51,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:37:51,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:37:51,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:37:51,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:37:51,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:37:51,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:37:51,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:37:51,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:37:51,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:37:51,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:37:51,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:37:51,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:37:51,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:37:51,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:37:51,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:37:51,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:37:51,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:37:51,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:37:51,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:37:51,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:37:51,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:37:51,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:37:51,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:37:51,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:37:51,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:37:51,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:37:51,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:37:51,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:37:51,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:37:51,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:37:51,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:37:51,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:37:51,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:37:51,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:37:51,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 18:37:51,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:37:51,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:37:51,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:37:51,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:37:51,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:37:51,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:37:51,460 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:37:51,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:37:51,461 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:37:51,461 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:37:51,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:37:51,462 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:37:51,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:37:51,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:37:51,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:37:51,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:37:51,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:37:51,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:37:51,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:37:51,466 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:37:51,466 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:37:51,467 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:37:51,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:37:51,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:37:51,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:37:51,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:37:51,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:37:51,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:37:51,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:37:51,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:37:51,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:37:51,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:37:51,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:37:51,470 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:37:51,470 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:37:51,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:37:51,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:37:51,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:37:51,471 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 [2021-11-25 18:37:51,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:37:51,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:37:51,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:37:51,945 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:37:51,946 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:37:51,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-25 18:37:52,022 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/data/fc518252c/3ba95349e8144b89ba3bd09eef753c21/FLAG93bcd7c52 [2021-11-25 18:37:52,726 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:37:52,727 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-25 18:37:52,763 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/data/fc518252c/3ba95349e8144b89ba3bd09eef753c21/FLAG93bcd7c52 [2021-11-25 18:37:52,900 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/data/fc518252c/3ba95349e8144b89ba3bd09eef753c21 [2021-11-25 18:37:52,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:37:52,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:37:52,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:37:52,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:37:52,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:37:52,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:37:52" (1/1) ... [2021-11-25 18:37:52,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1fb2f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:52, skipping insertion in model container [2021-11-25 18:37:52,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:37:52" (1/1) ... [2021-11-25 18:37:52,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:37:53,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:37:53,666 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-25 18:37:53,687 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-25 18:37:53,810 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-25 18:37:53,811 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-25 18:37:53,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:53,833 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 18:37:53,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:37:53,874 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-25 18:37:53,876 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-25 18:37:53,988 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-25 18:37:53,989 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-25 18:37:53,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:54,000 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:37:54,032 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-25 18:37:54,034 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-25 18:37:54,095 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_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-25 18:37:54,096 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-25 18:37:54,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:54,191 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:37:54,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54 WrapperNode [2021-11-25 18:37:54,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:37:54,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:37:54,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:37:54,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:37:54,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (1/1) ... [2021-11-25 18:37:54,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (1/1) ... [2021-11-25 18:37:54,305 INFO L137 Inliner]: procedures = 285, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1039 [2021-11-25 18:37:54,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:37:54,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:37:54,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:37:54,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:37:54,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (1/1) ... [2021-11-25 18:37:54,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (1/1) ... [2021-11-25 18:37:54,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (1/1) ... [2021-11-25 18:37:54,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (1/1) ... [2021-11-25 18:37:54,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (1/1) ... [2021-11-25 18:37:54,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (1/1) ... [2021-11-25 18:37:54,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (1/1) ... [2021-11-25 18:37:54,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:37:54,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:37:54,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:37:54,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:37:54,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (1/1) ... [2021-11-25 18:37:54,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:37:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:54,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:37:54,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:37:54,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 18:37:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 18:37:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:37:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 18:37:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:37:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:37:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 18:37:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:37:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-25 18:37:54,567 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-25 18:37:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:37:54,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:37:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:37:54,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:37:54,568 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-25 18:37:54,569 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-25 18:37:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:37:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-25 18:37:54,570 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-25 18:37:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:37:54,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:37:54,808 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:37:54,810 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:38:00,548 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:38:00,559 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:38:00,559 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-25 18:38:00,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:38:00 BoogieIcfgContainer [2021-11-25 18:38:00,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:38:00,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:38:00,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:38:00,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:38:00,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:37:52" (1/3) ... [2021-11-25 18:38:00,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e71f5f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:38:00, skipping insertion in model container [2021-11-25 18:38:00,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:54" (2/3) ... [2021-11-25 18:38:00,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e71f5f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:38:00, skipping insertion in model container [2021-11-25 18:38:00,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:38:00" (3/3) ... [2021-11-25 18:38:00,570 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test6-1.i [2021-11-25 18:38:00,575 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:38:00,576 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 18:38:00,629 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:38:00,642 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 18:38:00,646 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 18:38:00,674 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 18:38:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:38:00,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:00,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:00,681 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 18:38:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-25 18:38:00,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:00,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694842981] [2021-11-25 18:38:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:00,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:00,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:00,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:00,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:38:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:00,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 18:38:00,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:01,025 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 18:38:01,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:01,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:01,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694842981] [2021-11-25 18:38:01,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694842981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:01,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:01,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:38:01,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371722419] [2021-11-25 18:38:01,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:01,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:38:01,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:38:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:38:01,089 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 18:38:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:01,145 INFO L93 Difference]: Finished difference Result 445 states and 724 transitions. [2021-11-25 18:38:01,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:38:01,147 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 18:38:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:01,165 INFO L225 Difference]: With dead ends: 445 [2021-11-25 18:38:01,165 INFO L226 Difference]: Without dead ends: 218 [2021-11-25 18:38:01,170 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 18:38:01,174 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 18:38:01,175 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 18:38:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-25 18:38:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-25 18:38:01,222 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 18:38:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 281 transitions. [2021-11-25 18:38:01,228 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 281 transitions. Word has length 8 [2021-11-25 18:38:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:01,228 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 281 transitions. [2021-11-25 18:38:01,229 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 18:38:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 281 transitions. [2021-11-25 18:38:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:38:01,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:01,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:01,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:01,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:38:01,443 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 18:38:01,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:01,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-25 18:38:01,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:01,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331944495] [2021-11-25 18:38:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:01,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:01,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:01,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:01,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:38:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:01,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:38:01,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:01,802 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 18:38:01,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:01,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:01,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331944495] [2021-11-25 18:38:01,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331944495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:01,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:01,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:38:01,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946721886] [2021-11-25 18:38:01,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:01,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:01,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:01,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:01,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:38:01,807 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 18:38:04,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:06,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:06,254 INFO L93 Difference]: Finished difference Result 551 states and 718 transitions. [2021-11-25 18:38:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:38:06,256 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 18:38:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:06,260 INFO L225 Difference]: With dead ends: 551 [2021-11-25 18:38:06,260 INFO L226 Difference]: Without dead ends: 335 [2021-11-25 18:38:06,262 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 18:38:06,263 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 147 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s 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, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:06,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 751 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 18:38:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-25 18:38:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 325. [2021-11-25 18:38:06,298 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 18:38:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 423 transitions. [2021-11-25 18:38:06,302 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 423 transitions. Word has length 10 [2021-11-25 18:38:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:06,302 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 423 transitions. [2021-11-25 18:38:06,302 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 18:38:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 423 transitions. [2021-11-25 18:38:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:38:06,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:06,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:06,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-25 18:38:06,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:38:06,516 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 18:38:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1199048252, now seen corresponding path program 1 times [2021-11-25 18:38:06,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:06,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786020362] [2021-11-25 18:38:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:06,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:06,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:06,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:06,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:38:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:06,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:38:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:06,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:06,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:06,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:06,846 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-25 18:38:06,847 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 18:38:06,926 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 18:38:06,926 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 18:38:06,972 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 18:38:06,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:06,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:06,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786020362] [2021-11-25 18:38:06,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786020362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:06,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:06,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:38:06,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194770648] [2021-11-25 18:38:06,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:06,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:06,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:38:06,977 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 18:38:11,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:14,307 INFO L93 Difference]: Finished difference Result 595 states and 779 transitions. [2021-11-25 18:38:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:14,310 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 18:38:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:14,313 INFO L225 Difference]: With dead ends: 595 [2021-11-25 18:38:14,313 INFO L226 Difference]: Without dead ends: 421 [2021-11-25 18:38:14,314 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 18:38:14,316 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 152 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s 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, 7.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:14,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 711 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-25 18:38:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-25 18:38:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 324. [2021-11-25 18:38:14,348 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 18:38:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 421 transitions. [2021-11-25 18:38:14,351 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 421 transitions. Word has length 13 [2021-11-25 18:38:14,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:14,352 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 421 transitions. [2021-11-25 18:38:14,352 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 18:38:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 421 transitions. [2021-11-25 18:38:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:38:14,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:14,354 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 18:38:14,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:14,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:38:14,573 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 18:38:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:14,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1082818915, now seen corresponding path program 1 times [2021-11-25 18:38:14,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:14,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818212816] [2021-11-25 18:38:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:14,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:14,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:14,576 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:14,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:38:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:14,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:38:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:15,049 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 18:38:15,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:15,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:15,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818212816] [2021-11-25 18:38:15,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818212816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:15,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:15,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:38:15,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937548099] [2021-11-25 18:38:15,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:15,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:15,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:15,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:15,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:38:15,060 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 18:38:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:15,201 INFO L93 Difference]: Finished difference Result 646 states and 846 transitions. [2021-11-25 18:38:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:15,206 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 18:38:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:15,209 INFO L225 Difference]: With dead ends: 646 [2021-11-25 18:38:15,209 INFO L226 Difference]: Without dead ends: 332 [2021-11-25 18:38:15,210 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 18:38:15,212 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 18:38:15,213 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 18:38:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-25 18:38:15,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2021-11-25 18:38:15,237 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 18:38:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 411 transitions. [2021-11-25 18:38:15,240 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 411 transitions. Word has length 47 [2021-11-25 18:38:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:15,241 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 411 transitions. [2021-11-25 18:38:15,241 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 18:38:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 411 transitions. [2021-11-25 18:38:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:38:15,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:15,243 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 18:38:15,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-25 18:38:15,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:38:15,456 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 18:38:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash 206381993, now seen corresponding path program 1 times [2021-11-25 18:38:15,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:15,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012571157] [2021-11-25 18:38:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:15,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:15,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:15,459 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:15,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:38:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:15,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:38:15,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:15,929 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 18:38:15,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:15,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:15,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012571157] [2021-11-25 18:38:15,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012571157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:15,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:15,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:38:15,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482554747] [2021-11-25 18:38:15,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:15,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:38:15,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:38:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:38:15,931 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 18:38:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:16,077 INFO L93 Difference]: Finished difference Result 342 states and 423 transitions. [2021-11-25 18:38:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:38:16,077 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 18:38:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:16,080 INFO L225 Difference]: With dead ends: 342 [2021-11-25 18:38:16,081 INFO L226 Difference]: Without dead ends: 340 [2021-11-25 18:38:16,081 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 18:38:16,083 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 18:38:16,083 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 18:38:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-25 18:38:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2021-11-25 18:38:16,103 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 18:38:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 421 transitions. [2021-11-25 18:38:16,106 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 421 transitions. Word has length 47 [2021-11-25 18:38:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:16,107 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 421 transitions. [2021-11-25 18:38:16,107 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 18:38:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 421 transitions. [2021-11-25 18:38:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 18:38:16,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:16,110 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 18:38:16,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:16,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:38:16,330 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 18:38:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1298801861, now seen corresponding path program 1 times [2021-11-25 18:38:16,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:16,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510017386] [2021-11-25 18:38:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:16,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:16,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:16,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:16,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 18:38:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:16,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:38:16,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:17,138 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 18:38:17,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:17,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:17,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510017386] [2021-11-25 18:38:17,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510017386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:17,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:17,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:38:17,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356970535] [2021-11-25 18:38:17,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:17,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:38:17,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:38:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:38:17,141 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 18:38:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:17,475 INFO L93 Difference]: Finished difference Result 642 states and 803 transitions. [2021-11-25 18:38:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:38:17,476 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 18:38:17,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:17,480 INFO L225 Difference]: With dead ends: 642 [2021-11-25 18:38:17,480 INFO L226 Difference]: Without dead ends: 348 [2021-11-25 18:38:17,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:38:17,482 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, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:17,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1206 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:38:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-25 18:38:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2021-11-25 18:38:17,504 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 18:38:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 426 transitions. [2021-11-25 18:38:17,507 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 426 transitions. Word has length 62 [2021-11-25 18:38:17,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:17,508 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 426 transitions. [2021-11-25 18:38:17,508 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 18:38:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 426 transitions. [2021-11-25 18:38:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 18:38:17,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:17,512 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 18:38:17,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:17,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:38:17,735 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 18:38:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:17,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2017357497, now seen corresponding path program 1 times [2021-11-25 18:38:17,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:17,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280326512] [2021-11-25 18:38:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:17,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:17,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:17,738 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:17,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 18:38:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:18,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:38:18,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:18,514 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 18:38:18,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:18,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280326512] [2021-11-25 18:38:18,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280326512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:18,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:38:18,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682927797] [2021-11-25 18:38:18,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:18,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:18,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:38:18,517 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 18:38:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:18,596 INFO L93 Difference]: Finished difference Result 645 states and 807 transitions. [2021-11-25 18:38:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:18,598 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 18:38:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:18,601 INFO L225 Difference]: With dead ends: 645 [2021-11-25 18:38:18,601 INFO L226 Difference]: Without dead ends: 348 [2021-11-25 18:38:18,602 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 18:38:18,603 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 18:38:18,604 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 18:38:18,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-25 18:38:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2021-11-25 18:38:18,623 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 18:38:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 431 transitions. [2021-11-25 18:38:18,627 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 431 transitions. Word has length 67 [2021-11-25 18:38:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:18,628 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 431 transitions. [2021-11-25 18:38:18,628 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 18:38:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 431 transitions. [2021-11-25 18:38:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 18:38:18,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:18,630 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 18:38:18,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:18,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:38:18,838 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 18:38:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:18,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1833215856, now seen corresponding path program 1 times [2021-11-25 18:38:18,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:18,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185962490] [2021-11-25 18:38:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:18,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:18,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:18,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:18,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 18:38:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:19,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:38:19,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:19,589 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 18:38:19,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:19,851 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 18:38:19,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:19,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185962490] [2021-11-25 18:38:19,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185962490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:19,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [675637770] [2021-11-25 18:38:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:19,853 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:38:19,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:38:19,855 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:38:19,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-25 18:38:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:20,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:38:20,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:20,802 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 18:38:20,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:21,281 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 18:38:21,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [675637770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:21,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069368651] [2021-11-25 18:38:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:21,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:21,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:21,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:21,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:38:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:21,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:38:21,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:21,838 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 18:38:21,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:21,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069368651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:21,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-25 18:38:21,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 7, 7] total 18 [2021-11-25 18:38:21,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929342832] [2021-11-25 18:38:21,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:21,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:21,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:21,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:38:21,846 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 18:38:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:22,168 INFO L93 Difference]: Finished difference Result 1212 states and 1532 transitions. [2021-11-25 18:38:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:22,169 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 18:38:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:22,175 INFO L225 Difference]: With dead ends: 1212 [2021-11-25 18:38:22,176 INFO L226 Difference]: Without dead ends: 911 [2021-11-25 18:38:22,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:38:22,180 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, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:22,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 1438 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:38:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-11-25 18:38:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 858. [2021-11-25 18:38:22,230 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 18:38:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1084 transitions. [2021-11-25 18:38:22,236 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1084 transitions. Word has length 68 [2021-11-25 18:38:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:22,236 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 1084 transitions. [2021-11-25 18:38:22,237 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 18:38:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1084 transitions. [2021-11-25 18:38:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 18:38:22,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:22,243 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 18:38:22,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:22,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:22,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:22,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:38:22,857 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 18:38:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:22,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2100618219, now seen corresponding path program 1 times [2021-11-25 18:38:22,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:22,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325675553] [2021-11-25 18:38:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:22,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:22,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:22,859 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:22,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 18:38:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:23,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:38:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:23,969 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 18:38:23,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:24,291 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 18:38:24,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325675553] [2021-11-25 18:38:24,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325675553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [19797019] [2021-11-25 18:38:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:24,292 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:38:24,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:38:24,297 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:38:24,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-25 18:38:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:38:25,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:25,294 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 18:38:25,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:25,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [19797019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:25,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:38:25,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2021-11-25 18:38:25,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099340258] [2021-11-25 18:38:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:25,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:38:25,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:25,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:38:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:38:25,297 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 18:38:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:25,369 INFO L93 Difference]: Finished difference Result 1672 states and 2122 transitions. [2021-11-25 18:38:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:38:25,370 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 18:38:25,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:25,377 INFO L225 Difference]: With dead ends: 1672 [2021-11-25 18:38:25,377 INFO L226 Difference]: Without dead ends: 861 [2021-11-25 18:38:25,379 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 18:38:25,380 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 18:38:25,381 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 18:38:25,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-11-25 18:38:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2021-11-25 18:38:25,419 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 18:38:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1087 transitions. [2021-11-25 18:38:25,425 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1087 transitions. Word has length 95 [2021-11-25 18:38:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:25,426 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1087 transitions. [2021-11-25 18:38:25,426 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 18:38:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1087 transitions. [2021-11-25 18:38:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 18:38:25,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:25,428 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 18:38:25,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:25,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:25,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:38:25,839 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 18:38:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1707591209, now seen corresponding path program 1 times [2021-11-25 18:38:25,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:25,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072026250] [2021-11-25 18:38:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:25,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:25,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:25,841 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:25,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 18:38:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:38:26,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:26,820 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 18:38:26,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:27,121 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 18:38:27,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:27,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072026250] [2021-11-25 18:38:27,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072026250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:27,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1987562803] [2021-11-25 18:38:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:27,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:38:27,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:38:27,124 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:38:27,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-25 18:38:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:27,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:38:27,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:28,418 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 18:38:28,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:29,145 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 18:38:29,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1987562803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:29,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135198177] [2021-11-25 18:38:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:29,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:29,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:29,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:29,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:38:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:29,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:38:29,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:30,223 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 18:38:30,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:30,538 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 18:38:30,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135198177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:30,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:38:30,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 10, 8, 7] total 23 [2021-11-25 18:38:30,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290274632] [2021-11-25 18:38:30,539 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:38:30,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:38:30,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:30,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:38:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:38:30,541 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 18:38:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:40,042 INFO L93 Difference]: Finished difference Result 5146 states and 6619 transitions. [2021-11-25 18:38:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-25 18:38:40,043 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 18:38:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:40,070 INFO L225 Difference]: With dead ends: 5146 [2021-11-25 18:38:40,071 INFO L226 Difference]: Without dead ends: 4332 [2021-11-25 18:38:40,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2724, Invalid=10158, Unknown=0, NotChecked=0, Total=12882 [2021-11-25 18:38:40,079 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 7111 mSDsluCounter, 11739 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 880 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7145 SdHoareTripleChecker+Valid, 12723 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 880 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:40,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7145 Valid, 12723 Invalid, 3091 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [880 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-25 18:38:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-11-25 18:38:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 2796. [2021-11-25 18:38:40,210 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 18:38:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 3566 transitions. [2021-11-25 18:38:40,223 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 3566 transitions. Word has length 95 [2021-11-25 18:38:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:40,224 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 3566 transitions. [2021-11-25 18:38:40,224 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 18:38:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 3566 transitions. [2021-11-25 18:38:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-25 18:38:40,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:40,226 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 18:38:40,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:40,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:40,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:40,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:40,842 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 18:38:40,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:40,842 INFO L85 PathProgramCache]: Analyzing trace with hash 197394771, now seen corresponding path program 1 times [2021-11-25 18:38:40,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:40,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153736711] [2021-11-25 18:38:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:40,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:40,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:40,845 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:40,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 18:38:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:38:41,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:42,034 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 18:38:42,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:42,675 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 18:38:42,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:42,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153736711] [2021-11-25 18:38:42,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153736711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:42,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1502863293] [2021-11-25 18:38:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:42,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:38:42,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:38:42,680 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:38:42,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 18:38:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:44,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:38:44,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:44,221 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 18:38:44,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:44,547 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 18:38:44,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1502863293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:44,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372362421] [2021-11-25 18:38:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:44,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:44,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:44,549 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:44,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 18:38:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:45,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:38:45,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:45,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:45,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:45,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:45,465 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-25 18:38:45,466 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 18:38:45,572 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 18:38:45,572 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 18:38:45,623 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 18:38:45,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:45,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372362421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:45,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-25 18:38:45,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 8, 8, 8] total 16 [2021-11-25 18:38:45,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892387574] [2021-11-25 18:38:45,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:45,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:45,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:45,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:45,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:38:45,626 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 18:38:49,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:52,388 INFO L93 Difference]: Finished difference Result 3579 states and 4645 transitions. [2021-11-25 18:38:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:52,393 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 18:38:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:52,415 INFO L225 Difference]: With dead ends: 3579 [2021-11-25 18:38:52,415 INFO L226 Difference]: Without dead ends: 3557 [2021-11-25 18:38:52,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:38:52,419 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 136 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s 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, 6.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:52,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 687 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2021-11-25 18:38:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-11-25 18:38:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2814. [2021-11-25 18:38:52,556 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 18:38:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 3584 transitions. [2021-11-25 18:38:52,617 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 3584 transitions. Word has length 104 [2021-11-25 18:38:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:52,617 INFO L470 AbstractCegarLoop]: Abstraction has 2814 states and 3584 transitions. [2021-11-25 18:38:52,618 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 18:38:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 3584 transitions. [2021-11-25 18:38:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:38:52,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:52,619 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 18:38:52,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:52,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-25 18:38:53,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-25 18:38:53,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:53,230 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 18:38:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:53,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2135958996, now seen corresponding path program 1 times [2021-11-25 18:38:53,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:38:53,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180338651] [2021-11-25 18:38:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:53,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:38:53,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:38:53,233 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:38:53,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 18:38:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:38:54,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:54,551 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 18:38:54,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:55,255 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 18:38:55,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:38:55,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180338651] [2021-11-25 18:38:55,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180338651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:55,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [5979024] [2021-11-25 18:38:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:55,256 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:38:55,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:38:55,257 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:38:55,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-25 18:38:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:38:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:57,326 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 18:38:57,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:57,621 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 18:38:57,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [5979024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:57,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092398078] [2021-11-25 18:38:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:57,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:57,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:57,623 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:57,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 18:38:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:58,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:38:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:58,756 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 18:38:58,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:59,230 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 18:38:59,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092398078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:59,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:38:59,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-25 18:38:59,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771340702] [2021-11-25 18:38:59,231 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:38:59,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:38:59,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:38:59,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:38:59,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:38:59,233 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 18:39:01,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:01,228 INFO L93 Difference]: Finished difference Result 5813 states and 7461 transitions. [2021-11-25 18:39:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 18:39:01,229 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 18:39:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:01,249 INFO L225 Difference]: With dead ends: 5813 [2021-11-25 18:39:01,249 INFO L226 Difference]: Without dead ends: 2982 [2021-11-25 18:39:01,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 672 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 18:39:01,258 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 178 mSDsluCounter, 2406 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:01,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 2678 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:39:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-11-25 18:39:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2898. [2021-11-25 18:39:01,443 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 18:39:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 3696 transitions. [2021-11-25 18:39:01,454 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 3696 transitions. Word has length 116 [2021-11-25 18:39:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:01,455 INFO L470 AbstractCegarLoop]: Abstraction has 2898 states and 3696 transitions. [2021-11-25 18:39:01,456 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 18:39:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 3696 transitions. [2021-11-25 18:39:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 18:39:01,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:01,458 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 18:39:01,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:01,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:01,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:02,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:39:02,077 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 18:39:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:02,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1661117524, now seen corresponding path program 2 times [2021-11-25 18:39:02,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:39:02,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834819892] [2021-11-25 18:39:02,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:39:02,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:39:02,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:39:02,079 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:39:02,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 18:39:04,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:39:04,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:39:04,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:39:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:04,993 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 18:39:04,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:06,327 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 18:39:06,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:39:06,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834819892] [2021-11-25 18:39:06,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834819892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:06,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [144247399] [2021-11-25 18:39:06,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:39:06,327 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:39:06,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:39:06,328 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:39:06,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 18:39:20,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:39:20,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:39:20,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:39:20,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:20,631 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 18:39:20,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:21,075 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 18:39:21,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [144247399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:21,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739477028] [2021-11-25 18:39:21,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:39:21,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:21,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:21,078 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:21,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e8b9aaa-f89d-459c-8ebb-14e2538565e4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process