./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI --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 bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:25:06,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:25:06,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:25:06,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:25:06,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:25:06,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:25:06,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:25:06,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:25:06,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:25:06,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:25:06,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:25:06,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:25:06,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:25:06,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:25:06,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:25:06,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:25:06,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:25:06,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:25:06,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:25:06,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:25:06,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:25:06,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:25:06,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:25:06,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:25:06,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:25:06,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:25:06,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:25:06,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:25:06,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:25:06,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:25:06,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:25:06,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:25:06,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:25:06,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:25:06,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:25:06,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:25:06,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:25:06,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:25:06,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:25:06,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:25:06,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:25:06,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:25:06,180 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:25:06,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:25:06,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:25:06,181 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:25:06,182 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:25:06,182 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:25:06,182 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:25:06,182 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:25:06,183 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:25:06,183 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:25:06,183 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:25:06,183 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:25:06,183 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:25:06,184 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:25:06,184 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:25:06,184 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:25:06,184 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:25:06,184 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:25:06,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:25:06,185 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:25:06,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:25:06,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:25:06,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:25:06,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:25:06,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:25:06,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:25:06,187 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:25:06,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:25:06,187 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:25:06,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:25:06,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:25:06,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:25:06,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:06,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:25:06,189 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:25:06,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:25:06,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:25:06,189 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:25:06,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:25:06,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:25:06,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:25:06,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 [2022-11-03 02:25:06,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:25:06,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:25:06,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:25:06,511 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:25:06,512 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:25:06,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2022-11-03 02:25:06,592 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/data/e7d506524/e37fe9e482bc49e9af029ad5726e360c/FLAG7351317e5 [2022-11-03 02:25:07,208 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:25:07,208 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2022-11-03 02:25:07,223 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/data/e7d506524/e37fe9e482bc49e9af029ad5726e360c/FLAG7351317e5 [2022-11-03 02:25:07,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/data/e7d506524/e37fe9e482bc49e9af029ad5726e360c [2022-11-03 02:25:07,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:25:07,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:25:07,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:07,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:25:07,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:25:07,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:07" (1/1) ... [2022-11-03 02:25:07,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@668f8ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:07, skipping insertion in model container [2022-11-03 02:25:07,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:07" (1/1) ... [2022-11-03 02:25:07,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:25:07,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:25:08,292 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44118,44131] [2022-11-03 02:25:08,306 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44660,44673] [2022-11-03 02:25:08,472 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56247,56260] [2022-11-03 02:25:08,473 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56368,56381] [2022-11-03 02:25:08,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:08,493 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:25:08,522 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44118,44131] [2022-11-03 02:25:08,524 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44660,44673] [2022-11-03 02:25:08,571 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56247,56260] [2022-11-03 02:25:08,571 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56368,56381] [2022-11-03 02:25:08,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:08,667 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:25:08,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08 WrapperNode [2022-11-03 02:25:08,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:08,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:08,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:25:08,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:25:08,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,793 INFO L138 Inliner]: procedures = 282, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1199 [2022-11-03 02:25:08,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:08,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:25:08,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:25:08,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:25:08,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,920 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:25:08,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:25:08,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:25:08,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:25:08,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (1/1) ... [2022-11-03 02:25:08,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:08,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:08,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:25:09,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:25:09,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:25:09,048 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:25:09,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:25:09,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:25:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-11-03 02:25:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-11-03 02:25:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:25:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:25:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:25:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:25:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:25:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:25:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-11-03 02:25:09,050 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-11-03 02:25:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:25:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-11-03 02:25:09,050 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-11-03 02:25:09,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:25:09,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:25:09,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:25:09,355 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:25:09,368 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:25:11,105 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:25:11,614 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:25:11,615 INFO L300 CfgBuilder]: Removed 72 assume(true) statements. [2022-11-03 02:25:11,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:25:11 BoogieIcfgContainer [2022-11-03 02:25:11,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:25:11,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:25:11,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:25:11,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:25:11,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:25:07" (1/3) ... [2022-11-03 02:25:11,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4cb7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:25:11, skipping insertion in model container [2022-11-03 02:25:11,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:08" (2/3) ... [2022-11-03 02:25:11,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4cb7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:25:11, skipping insertion in model container [2022-11-03 02:25:11,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:25:11" (3/3) ... [2022-11-03 02:25:11,634 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test6-2.i [2022-11-03 02:25:11,653 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:25:11,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-03 02:25:11,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:25:11,713 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2403e6e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:25:11,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-03 02:25:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 136 states have (on average 1.713235294117647) internal successors, (233), 140 states have internal predecessors, (233), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:25:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:25:11,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:11,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:11,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:25:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:11,742 INFO L85 PathProgramCache]: Analyzing trace with hash -435450484, now seen corresponding path program 1 times [2022-11-03 02:25:11,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:11,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368158497] [2022-11-03 02:25:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:11,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:11,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:11,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368158497] [2022-11-03 02:25:11,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368158497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:11,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:11,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:25:11,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624340246] [2022-11-03 02:25:11,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:11,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:25:11,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:11,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:25:11,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:25:11,974 INFO L87 Difference]: Start difference. First operand has 160 states, 136 states have (on average 1.713235294117647) internal successors, (233), 140 states have internal predecessors, (233), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) 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) [2022-11-03 02:25:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:12,749 INFO L93 Difference]: Finished difference Result 317 states and 538 transitions. [2022-11-03 02:25:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:25:12,754 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 [2022-11-03 02:25:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:12,763 INFO L225 Difference]: With dead ends: 317 [2022-11-03 02:25:12,764 INFO L226 Difference]: Without dead ends: 157 [2022-11-03 02:25:12,767 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:25:12,771 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:12,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 161 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:25:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-03 02:25:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-03 02:25:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 134 states have (on average 1.1791044776119404) internal successors, (158), 138 states have internal predecessors, (158), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:25:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2022-11-03 02:25:12,829 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 188 transitions. Word has length 7 [2022-11-03 02:25:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:12,829 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 188 transitions. [2022-11-03 02:25:12,830 INFO L496 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) [2022-11-03 02:25:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 188 transitions. [2022-11-03 02:25:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:25:12,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:12,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:12,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:25:12,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:25:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1156235943, now seen corresponding path program 1 times [2022-11-03 02:25:12,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:12,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860685672] [2022-11-03 02:25:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:13,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:13,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860685672] [2022-11-03 02:25:13,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860685672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:13,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:13,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:13,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206835960] [2022-11-03 02:25:13,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:13,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:25:13,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:13,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:25:13,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:25:13,060 INFO L87 Difference]: Start difference. First operand 157 states and 188 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) [2022-11-03 02:25:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:15,738 INFO L93 Difference]: Finished difference Result 324 states and 391 transitions. [2022-11-03 02:25:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:25:15,739 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 [2022-11-03 02:25:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:15,741 INFO L225 Difference]: With dead ends: 324 [2022-11-03 02:25:15,741 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 02:25:15,742 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:25:15,743 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 74 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:15,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 449 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:25:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 02:25:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 159. [2022-11-03 02:25:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 140 states have internal predecessors, (160), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:25:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2022-11-03 02:25:15,762 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 9 [2022-11-03 02:25:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:15,763 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2022-11-03 02:25:15,763 INFO L496 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) [2022-11-03 02:25:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2022-11-03 02:25:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:25:15,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:15,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:15,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:25:15,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:25:15,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash 618014543, now seen corresponding path program 1 times [2022-11-03 02:25:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:15,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828257829] [2022-11-03 02:25:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:15,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:15,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:25:15,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813072374] [2022-11-03 02:25:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:15,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:15,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:15,809 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:15,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:25:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:16,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:25:16,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:16,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:16,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:16,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828257829] [2022-11-03 02:25:16,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:25:16,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813072374] [2022-11-03 02:25:16,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813072374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:16,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:16,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:25:16,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484951712] [2022-11-03 02:25:16,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:16,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:25:16,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:25:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:16,696 INFO L87 Difference]: Start difference. First operand 159 states and 190 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) [2022-11-03 02:25:18,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:18,593 INFO L93 Difference]: Finished difference Result 170 states and 201 transitions. [2022-11-03 02:25:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:25:18,594 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 [2022-11-03 02:25:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:18,596 INFO L225 Difference]: With dead ends: 170 [2022-11-03 02:25:18,596 INFO L226 Difference]: Without dead ends: 168 [2022-11-03 02:25:18,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:25:18,603 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 11 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:18,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 775 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:25:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-03 02:25:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-11-03 02:25:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 142 states have (on average 1.176056338028169) internal successors, (167), 147 states have internal predecessors, (167), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:25:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2022-11-03 02:25:18,620 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 20 [2022-11-03 02:25:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:18,621 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2022-11-03 02:25:18,621 INFO L496 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) [2022-11-03 02:25:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2022-11-03 02:25:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:25:18,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:18,629 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:25:18,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:18,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:18,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:25:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash -746982808, now seen corresponding path program 1 times [2022-11-03 02:25:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:18,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125080692] [2022-11-03 02:25:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:19,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:25:19,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510511006] [2022-11-03 02:25:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:19,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:19,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:19,002 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:19,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:25:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:19,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:25:19,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:19,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:19,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:19,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125080692] [2022-11-03 02:25:19,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:25:19,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510511006] [2022-11-03 02:25:19,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510511006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:19,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:19,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:25:19,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910797198] [2022-11-03 02:25:19,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:19,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:19,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:19,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:19,856 INFO L87 Difference]: Start difference. First operand 168 states and 199 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) [2022-11-03 02:25:21,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:25:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:22,029 INFO L93 Difference]: Finished difference Result 408 states and 486 transitions. [2022-11-03 02:25:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:22,030 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 [2022-11-03 02:25:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:22,032 INFO L225 Difference]: With dead ends: 408 [2022-11-03 02:25:22,032 INFO L226 Difference]: Without dead ends: 243 [2022-11-03 02:25:22,033 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:25:22,034 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 68 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:22,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 314 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:25:22,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-03 02:25:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 211. [2022-11-03 02:25:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 190 states have internal predecessors, (216), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:25:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 248 transitions. [2022-11-03 02:25:22,052 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 248 transitions. Word has length 28 [2022-11-03 02:25:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:22,053 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 248 transitions. [2022-11-03 02:25:22,053 INFO L496 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) [2022-11-03 02:25:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 248 transitions. [2022-11-03 02:25:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 02:25:22,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:22,054 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:25:22,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:22,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:22,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:25:22,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:22,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1769840484, now seen corresponding path program 1 times [2022-11-03 02:25:22,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:22,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348220660] [2022-11-03 02:25:22,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:22,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:22,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:25:22,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522746810] [2022-11-03 02:25:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:22,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:22,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:22,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:22,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:25:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:22,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:25:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:22,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:23,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:23,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348220660] [2022-11-03 02:25:23,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:25:23,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522746810] [2022-11-03 02:25:23,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522746810] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:23,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:25:23,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2022-11-03 02:25:23,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809806072] [2022-11-03 02:25:23,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:23,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:25:23,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:23,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:25:23,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:25:23,051 INFO L87 Difference]: Start difference. First operand 211 states and 248 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) [2022-11-03 02:25:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:24,763 INFO L93 Difference]: Finished difference Result 801 states and 954 transitions. [2022-11-03 02:25:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:25:24,763 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 [2022-11-03 02:25:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:24,768 INFO L225 Difference]: With dead ends: 801 [2022-11-03 02:25:24,768 INFO L226 Difference]: Without dead ends: 606 [2022-11-03 02:25:24,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:25:24,770 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 1008 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:24,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 572 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:25:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-03 02:25:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 356. [2022-11-03 02:25:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 320 states have (on average 1.175) internal successors, (376), 326 states have internal predecessors, (376), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (23), 19 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-03 02:25:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 421 transitions. [2022-11-03 02:25:24,804 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 421 transitions. Word has length 32 [2022-11-03 02:25:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:24,804 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 421 transitions. [2022-11-03 02:25:24,805 INFO L496 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) [2022-11-03 02:25:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 421 transitions. [2022-11-03 02:25:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:25:24,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:24,807 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:25:24,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:25,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:25,027 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:25:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash -498476679, now seen corresponding path program 1 times [2022-11-03 02:25:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:25,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233013130] [2022-11-03 02:25:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:25,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:25:25,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491491503] [2022-11-03 02:25:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:25,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:25,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:25,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:25,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:25:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:25,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:25:25,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:25:25,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:25,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:25,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233013130] [2022-11-03 02:25:25,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:25:25,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491491503] [2022-11-03 02:25:25,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491491503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:25,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:25,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:25:25,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605463434] [2022-11-03 02:25:25,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:25,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:25:25,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:25:25,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:25,795 INFO L87 Difference]: Start difference. First operand 356 states and 421 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) [2022-11-03 02:25:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:28,730 INFO L93 Difference]: Finished difference Result 680 states and 806 transitions. [2022-11-03 02:25:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:25:28,730 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 [2022-11-03 02:25:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:28,733 INFO L225 Difference]: With dead ends: 680 [2022-11-03 02:25:28,734 INFO L226 Difference]: Without dead ends: 356 [2022-11-03 02:25:28,735 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:25:28,735 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 17 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:28,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 670 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 02:25:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-03 02:25:28,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2022-11-03 02:25:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 320 states have (on average 1.175) internal successors, (376), 326 states have internal predecessors, (376), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-03 02:25:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 420 transitions. [2022-11-03 02:25:28,759 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 420 transitions. Word has length 57 [2022-11-03 02:25:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:28,760 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 420 transitions. [2022-11-03 02:25:28,760 INFO L496 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) [2022-11-03 02:25:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 420 transitions. [2022-11-03 02:25:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:25:28,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:28,762 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:25:28,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:28,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:25:28,978 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:25:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1204393698, now seen corresponding path program 1 times [2022-11-03 02:25:28,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:28,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120472715] [2022-11-03 02:25:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:28,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:29,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:25:29,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307071605] [2022-11-03 02:25:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:29,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:29,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:29,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:29,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:25:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:29,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:25:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:29,703 INFO L390 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 [2022-11-03 02:25:29,723 INFO L390 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 [2022-11-03 02:25:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:25:29,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:29,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:29,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120472715] [2022-11-03 02:25:29,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:25:29,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307071605] [2022-11-03 02:25:29,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307071605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:29,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:29,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:25:29,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343936579] [2022-11-03 02:25:29,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:29,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:25:29,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:29,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:25:29,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:25:29,736 INFO L87 Difference]: Start difference. First operand 356 states and 420 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) [2022-11-03 02:25:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:31,788 INFO L93 Difference]: Finished difference Result 513 states and 615 transitions. [2022-11-03 02:25:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:25:31,794 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 [2022-11-03 02:25:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:31,796 INFO L225 Difference]: With dead ends: 513 [2022-11-03 02:25:31,797 INFO L226 Difference]: Without dead ends: 446 [2022-11-03 02:25:31,797 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:25:31,798 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 48 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:31,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 431 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:25:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-03 02:25:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 360. [2022-11-03 02:25:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 324 states have (on average 1.1728395061728396) internal successors, (380), 330 states have internal predecessors, (380), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-03 02:25:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 424 transitions. [2022-11-03 02:25:31,821 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 424 transitions. Word has length 62 [2022-11-03 02:25:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:31,821 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 424 transitions. [2022-11-03 02:25:31,822 INFO L496 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) [2022-11-03 02:25:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 424 transitions. [2022-11-03 02:25:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:25:31,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:31,824 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:25:31,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:32,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:32,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:25:32,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:32,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1031523685, now seen corresponding path program 1 times [2022-11-03 02:25:32,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:32,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275570679] [2022-11-03 02:25:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:32,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:32,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:25:32,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526433790] [2022-11-03 02:25:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:32,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:32,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:32,140 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:32,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:25:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:25:33,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:25:33,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:33,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:33,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275570679] [2022-11-03 02:25:33,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:25:33,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526433790] [2022-11-03 02:25:33,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526433790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:33,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:33,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:25:33,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922250845] [2022-11-03 02:25:33,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:33,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:25:33,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:33,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:25:33,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:25:33,162 INFO L87 Difference]: Start difference. First operand 360 states and 424 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) [2022-11-03 02:25:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:37,724 INFO L93 Difference]: Finished difference Result 692 states and 821 transitions. [2022-11-03 02:25:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:25:37,730 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 [2022-11-03 02:25:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:37,732 INFO L225 Difference]: With dead ends: 692 [2022-11-03 02:25:37,732 INFO L226 Difference]: Without dead ends: 363 [2022-11-03 02:25:37,733 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:25:37,734 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 14 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:37,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1004 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 02:25:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-03 02:25:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-11-03 02:25:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 326 states have (on average 1.1748466257668713) internal successors, (383), 333 states have internal predecessors, (383), 22 states have call successors, (22), 10 states have call predecessors, (22), 11 states have return successors, (23), 19 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-03 02:25:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 428 transitions. [2022-11-03 02:25:37,757 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 428 transitions. Word has length 69 [2022-11-03 02:25:37,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:37,757 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 428 transitions. [2022-11-03 02:25:37,757 INFO L496 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) [2022-11-03 02:25:37,758 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 428 transitions. [2022-11-03 02:25:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:25:37,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:37,759 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:25:37,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 02:25:37,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:37,974 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:25:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1542696511, now seen corresponding path program 1 times [2022-11-03 02:25:37,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:37,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082636837] [2022-11-03 02:25:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:37,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:38,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:25:38,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241692320] [2022-11-03 02:25:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:38,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:38,059 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:38,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:25:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:48,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:25:48,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:25:48,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:25:48,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:48,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082636837] [2022-11-03 02:25:48,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:25:48,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241692320] [2022-11-03 02:25:48,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241692320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:48,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277665286] [2022-11-03 02:25:48,755 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2022-11-03 02:25:48,756 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:25:48,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:25:48,765 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:25:48,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:25:48,836 INFO L390 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 15 treesize of output 1 [2022-11-03 02:25:48,842 INFO L390 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 15 treesize of output 1 [2022-11-03 02:25:48,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:48,881 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:25:48,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 02:25:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:48,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:25:48,928 INFO L356 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2022-11-03 02:25:48,929 INFO L390 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 93 [2022-11-03 02:25:48,943 INFO L390 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 [2022-11-03 02:25:48,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:48,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:25:48,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 52 treesize of output 21 [2022-11-03 02:25:48,997 INFO L390 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 [2022-11-03 02:25:49,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,050 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:25:49,051 INFO L390 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 [2022-11-03 02:25:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,210 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:25:49,210 INFO L390 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 [2022-11-03 02:25:49,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,238 INFO L390 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 [2022-11-03 02:25:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,261 INFO L390 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 108 treesize of output 96 [2022-11-03 02:25:49,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,281 INFO L390 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 [2022-11-03 02:25:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,310 INFO L390 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 [2022-11-03 02:25:49,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:49,326 INFO L390 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 29 treesize of output 40 [2022-11-03 02:25:49,784 INFO L390 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 24 treesize of output 9 [2022-11-03 02:25:49,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:25:49,808 INFO L390 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 [2022-11-03 02:25:49,827 INFO L390 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 [2022-11-03 02:25:49,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:25:49,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 [2022-11-03 02:25:49,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 [2022-11-03 02:25:49,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:25:49,944 INFO L390 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 25 treesize of output 1 [2022-11-03 02:25:49,947 INFO L390 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 25 treesize of output 1 [2022-11-03 02:25:49,950 INFO L390 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 16 treesize of output 12 [2022-11-03 02:25:49,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:25:49,980 INFO L390 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 8 treesize of output 7 [2022-11-03 02:25:50,032 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:25:50,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2022-11-03 02:25:50,046 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:25:50,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2022-11-03 02:25:50,063 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:25:50,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:25:50,178 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:25:50,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2022-11-03 02:25:50,212 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:25:50,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:25:50,233 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:25:50,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2022-11-03 02:25:50,376 INFO L356 Elim1Store]: treesize reduction 34, result has 43.3 percent of original size [2022-11-03 02:25:50,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 166 [2022-11-03 02:25:50,394 INFO L390 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 13 treesize of output 9 [2022-11-03 02:25:50,415 INFO L390 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 13 treesize of output 9 [2022-11-03 02:25:50,746 INFO L390 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 14 treesize of output 10 [2022-11-03 02:25:50,753 INFO L390 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 16 treesize of output 12 [2022-11-03 02:25:50,759 INFO L390 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 14 treesize of output 10 [2022-11-03 02:25:50,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 106 [2022-11-03 02:25:50,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 108 [2022-11-03 02:25:50,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 106 [2022-11-03 02:25:50,829 INFO L390 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 14 treesize of output 10 [2022-11-03 02:25:50,834 INFO L390 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 16 treesize of output 12 [2022-11-03 02:25:50,840 INFO L390 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 14 treesize of output 10 [2022-11-03 02:25:50,912 INFO L390 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 495 treesize of output 459 [2022-11-03 02:25:50,923 INFO L390 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 490 treesize of output 298 [2022-11-03 02:25:50,935 INFO L390 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 322 treesize of output 274 [2022-11-03 02:25:51,245 INFO L390 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 495 treesize of output 459 [2022-11-03 02:25:51,255 INFO L390 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 490 treesize of output 298 [2022-11-03 02:25:51,267 INFO L390 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 322 treesize of output 274 [2022-11-03 02:25:52,729 INFO L356 Elim1Store]: treesize reduction 340, result has 16.0 percent of original size [2022-11-03 02:25:52,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:52,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:52,931 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_513| input size 127 context size 127 output size 127 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) 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:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.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.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 02:25:52,934 INFO L158 Benchmark]: Toolchain (without parser) took 45344.02ms. Allocated memory was 94.4MB in the beginning and 230.7MB in the end (delta: 136.3MB). Free memory was 53.9MB in the beginning and 77.5MB in the end (delta: -23.6MB). Peak memory consumption was 113.4MB. Max. memory is 16.1GB. [2022-11-03 02:25:52,935 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory was 67.1MB in the beginning and 67.1MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:25:52,935 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1074.92ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 53.7MB in the beginning and 83.6MB in the end (delta: -29.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-03 02:25:52,935 INFO L158 Benchmark]: Boogie Procedure Inliner took 125.41ms. Allocated memory is still 115.3MB. Free memory was 83.6MB in the beginning and 74.6MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:25:52,935 INFO L158 Benchmark]: Boogie Preprocessor took 148.48ms. Allocated memory is still 115.3MB. Free memory was 74.6MB in the beginning and 65.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:25:52,936 INFO L158 Benchmark]: RCFGBuilder took 2676.36ms. Allocated memory was 115.3MB in the beginning and 151.0MB in the end (delta: 35.7MB). Free memory was 65.3MB in the beginning and 68.9MB in the end (delta: -3.6MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2022-11-03 02:25:52,936 INFO L158 Benchmark]: TraceAbstraction took 41312.34ms. Allocated memory was 151.0MB in the beginning and 230.7MB in the end (delta: 79.7MB). Free memory was 68.9MB in the beginning and 77.5MB in the end (delta: -8.6MB). Peak memory consumption was 72.9MB. Max. memory is 16.1GB. [2022-11-03 02:25:52,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory was 67.1MB in the beginning and 67.1MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1074.92ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 53.7MB in the beginning and 83.6MB in the end (delta: -29.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 125.41ms. Allocated memory is still 115.3MB. Free memory was 83.6MB in the beginning and 74.6MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 148.48ms. Allocated memory is still 115.3MB. Free memory was 74.6MB in the beginning and 65.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 2676.36ms. Allocated memory was 115.3MB in the beginning and 151.0MB in the end (delta: 35.7MB). Free memory was 65.3MB in the beginning and 68.9MB in the end (delta: -3.6MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. * TraceAbstraction took 41312.34ms. Allocated memory was 151.0MB in the beginning and 230.7MB in the end (delta: 79.7MB). Free memory was 68.9MB in the beginning and 77.5MB in the end (delta: -8.6MB). Peak memory consumption was 72.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_513| input size 127 context size 127 output size 127 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_513| input size 127 context size 127 output size 127: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:25:53,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI --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 bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:25:55,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:25:55,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:25:55,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:25:55,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:25:55,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:25:55,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:25:55,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:25:55,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:25:55,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:25:55,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:25:55,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:25:55,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:25:55,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:25:55,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:25:55,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:25:55,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:25:55,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:25:55,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:25:55,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:25:55,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:25:55,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:25:55,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:25:55,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:25:55,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:25:55,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:25:55,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:25:55,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:25:55,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:25:55,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:25:55,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:25:55,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:25:55,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:25:55,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:25:55,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:25:55,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:25:55,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:25:55,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:25:55,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:25:55,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:25:55,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:25:55,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:25:55,509 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:25:55,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:25:55,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:25:55,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:25:55,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:25:55,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:25:55,512 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:25:55,512 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:25:55,513 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:25:55,513 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:25:55,514 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:25:55,514 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:25:55,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:25:55,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:25:55,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:25:55,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:25:55,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:25:55,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:25:55,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:25:55,517 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:25:55,517 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:25:55,517 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:25:55,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:25:55,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:25:55,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:25:55,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:25:55,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:25:55,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:25:55,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:25:55,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:55,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:25:55,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:25:55,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:25:55,521 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:25:55,521 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:25:55,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:25:55,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:25:55,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:25:55,522 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 [2022-11-03 02:25:55,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:25:55,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:25:55,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:25:55,924 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:25:55,925 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:25:55,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2022-11-03 02:25:55,999 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/data/55984c0c2/b378edb05dbd46e9a2aee415b1fedc22/FLAG9cf393ccd [2022-11-03 02:25:56,711 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:25:56,712 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2022-11-03 02:25:56,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/data/55984c0c2/b378edb05dbd46e9a2aee415b1fedc22/FLAG9cf393ccd [2022-11-03 02:25:56,915 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/data/55984c0c2/b378edb05dbd46e9a2aee415b1fedc22 [2022-11-03 02:25:56,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:25:56,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:25:56,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:56,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:25:56,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:25:56,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:56" (1/1) ... [2022-11-03 02:25:56,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24337237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:56, skipping insertion in model container [2022-11-03 02:25:56,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:56" (1/1) ... [2022-11-03 02:25:56,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:25:57,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:25:57,718 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44118,44131] [2022-11-03 02:25:57,738 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44660,44673] [2022-11-03 02:25:57,876 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56247,56260] [2022-11-03 02:25:57,883 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56368,56381] [2022-11-03 02:25:57,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:57,922 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:25:57,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:25:57,957 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44118,44131] [2022-11-03 02:25:57,960 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44660,44673] [2022-11-03 02:25:58,020 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56247,56260] [2022-11-03 02:25:58,021 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56368,56381] [2022-11-03 02:25:58,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:58,051 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:25:58,088 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44118,44131] [2022-11-03 02:25:58,099 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[44660,44673] [2022-11-03 02:25:58,155 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56247,56260] [2022-11-03 02:25:58,162 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_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i[56368,56381] [2022-11-03 02:25:58,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:58,290 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:25:58,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58 WrapperNode [2022-11-03 02:25:58,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:58,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:58,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:25:58,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:25:58,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,430 INFO L138 Inliner]: procedures = 285, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1198 [2022-11-03 02:25:58,431 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:58,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:25:58,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:25:58,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:25:58,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,532 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:25:58,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:25:58,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:25:58,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:25:58,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (1/1) ... [2022-11-03 02:25:58,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:58,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:58,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:25:58,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:25:58,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 02:25:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:25:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:25:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:25:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:25:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:25:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:25:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:25:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-11-03 02:25:58,637 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-11-03 02:25:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:25:58,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:25:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:25:58,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:25:58,638 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-11-03 02:25:58,638 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-11-03 02:25:58,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:25:58,638 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-11-03 02:25:58,638 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-11-03 02:25:58,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:25:58,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:25:58,890 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:25:58,892 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:26:03,898 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:26:03,915 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:26:03,916 INFO L300 CfgBuilder]: Removed 72 assume(true) statements. [2022-11-03 02:26:03,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:26:03 BoogieIcfgContainer [2022-11-03 02:26:03,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:26:03,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:26:03,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:26:03,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:26:03,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:25:56" (1/3) ... [2022-11-03 02:26:03,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7c7408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:26:03, skipping insertion in model container [2022-11-03 02:26:03,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:58" (2/3) ... [2022-11-03 02:26:03,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7c7408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:26:03, skipping insertion in model container [2022-11-03 02:26:03,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:26:03" (3/3) ... [2022-11-03 02:26:03,930 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test6-2.i [2022-11-03 02:26:03,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:26:03,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-03 02:26:04,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:26:04,039 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e7c724d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:26:04,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-03 02:26:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 234 states have (on average 1.6367521367521367) internal successors, (383), 238 states have internal predecessors, (383), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:26:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:26:04,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:04,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:04,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:04,057 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2022-11-03 02:26:04,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:04,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741566548] [2022-11-03 02:26:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:04,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:04,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:04,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:04,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:26:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:26:04,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:04,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:04,357 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741566548] [2022-11-03 02:26:04,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741566548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:04,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:04,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:26:04,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960505683] [2022-11-03 02:26:04,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:04,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:26:04,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:26:04,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:26:04,403 INFO L87 Difference]: Start difference. First operand has 258 states, 234 states have (on average 1.6367521367521367) internal successors, (383), 238 states have internal predecessors, (383), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) 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) [2022-11-03 02:26:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:04,473 INFO L93 Difference]: Finished difference Result 511 states and 836 transitions. [2022-11-03 02:26:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:26:04,475 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 [2022-11-03 02:26:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:04,485 INFO L225 Difference]: With dead ends: 511 [2022-11-03 02:26:04,485 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 02:26:04,490 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:26:04,493 INFO L413 NwaCegarLoop]: 331 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, 331 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 [2022-11-03 02:26:04,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 02:26:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-11-03 02:26:04,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 228 states have (on average 1.3026315789473684) internal successors, (297), 232 states have internal predecessors, (297), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:26:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 327 transitions. [2022-11-03 02:26:04,578 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 327 transitions. Word has length 8 [2022-11-03 02:26:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:04,579 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 327 transitions. [2022-11-03 02:26:04,580 INFO L496 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) [2022-11-03 02:26:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 327 transitions. [2022-11-03 02:26:04,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:26:04,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:04,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:04,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:26:04,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:04,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2022-11-03 02:26:04,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:04,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487427185] [2022-11-03 02:26:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:04,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:04,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:04,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:04,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:26:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:05,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:26:05,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:05,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:05,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:05,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487427185] [2022-11-03 02:26:05,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487427185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:05,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:05,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:26:05,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356252064] [2022-11-03 02:26:05,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:05,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:05,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:26:05,141 INFO L87 Difference]: Start difference. First operand 251 states and 327 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) [2022-11-03 02:26:07,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:09,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:09,235 INFO L93 Difference]: Finished difference Result 651 states and 857 transitions. [2022-11-03 02:26:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:09,237 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 [2022-11-03 02:26:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:09,239 INFO L225 Difference]: With dead ends: 651 [2022-11-03 02:26:09,240 INFO L226 Difference]: Without dead ends: 398 [2022-11-03 02:26:09,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:09,242 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 186 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:09,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 924 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 121 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 02:26:09,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-03 02:26:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 361. [2022-11-03 02:26:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 335 states have (on average 1.31044776119403) internal successors, (439), 340 states have internal predecessors, (439), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 02:26:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 474 transitions. [2022-11-03 02:26:09,289 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 474 transitions. Word has length 10 [2022-11-03 02:26:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:09,290 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 474 transitions. [2022-11-03 02:26:09,290 INFO L496 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) [2022-11-03 02:26:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 474 transitions. [2022-11-03 02:26:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:26:09,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:09,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:09,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:09,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:09,492 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1195077116, now seen corresponding path program 1 times [2022-11-03 02:26:09,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:09,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450598377] [2022-11-03 02:26:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:09,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:09,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:09,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:09,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:26:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:09,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:26:09,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:09,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:26:09,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:26:09,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:26:09,795 INFO L390 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 30 treesize of output 39 [2022-11-03 02:26:09,861 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:26:09,862 INFO L390 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 70 treesize of output 26 [2022-11-03 02:26:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:09,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:09,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450598377] [2022-11-03 02:26:09,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450598377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:09,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:09,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:26:09,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131943670] [2022-11-03 02:26:09,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:09,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:09,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:09,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:26:09,888 INFO L87 Difference]: Start difference. First operand 361 states and 474 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) [2022-11-03 02:26:13,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:15,937 INFO L93 Difference]: Finished difference Result 693 states and 917 transitions. [2022-11-03 02:26:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:26:15,939 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 [2022-11-03 02:26:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:15,941 INFO L225 Difference]: With dead ends: 693 [2022-11-03 02:26:15,941 INFO L226 Difference]: Without dead ends: 483 [2022-11-03 02:26:15,942 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:26:15,943 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 179 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:15,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 867 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 02:26:15,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-03 02:26:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 360. [2022-11-03 02:26:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 334 states have (on average 1.3083832335329342) internal successors, (437), 339 states have internal predecessors, (437), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 02:26:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 472 transitions. [2022-11-03 02:26:15,967 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 472 transitions. Word has length 13 [2022-11-03 02:26:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:15,967 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 472 transitions. [2022-11-03 02:26:15,968 INFO L496 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) [2022-11-03 02:26:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 472 transitions. [2022-11-03 02:26:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:26:15,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:15,969 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:26:15,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-03 02:26:16,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:16,182 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:16,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1739977374, now seen corresponding path program 1 times [2022-11-03 02:26:16,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:16,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711070726] [2022-11-03 02:26:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:16,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:16,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:16,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:16,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:26:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:16,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:26:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:16,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:16,576 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:16,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711070726] [2022-11-03 02:26:16,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711070726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:16,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:16,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:26:16,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264482949] [2022-11-03 02:26:16,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:16,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:16,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:16,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:26:16,579 INFO L87 Difference]: Start difference. First operand 360 states and 472 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) [2022-11-03 02:26:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:16,724 INFO L93 Difference]: Finished difference Result 718 states and 948 transitions. [2022-11-03 02:26:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:26:16,725 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 [2022-11-03 02:26:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:16,727 INFO L225 Difference]: With dead ends: 718 [2022-11-03 02:26:16,727 INFO L226 Difference]: Without dead ends: 368 [2022-11-03 02:26:16,728 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:26:16,729 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 261 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 646 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 [2022-11-03 02:26:16,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 646 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-03 02:26:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 366. [2022-11-03 02:26:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 340 states have (on average 1.2558823529411764) internal successors, (427), 345 states have internal predecessors, (427), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 02:26:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 462 transitions. [2022-11-03 02:26:16,766 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 462 transitions. Word has length 47 [2022-11-03 02:26:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:16,766 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 462 transitions. [2022-11-03 02:26:16,766 INFO L496 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) [2022-11-03 02:26:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 462 transitions. [2022-11-03 02:26:16,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:26:16,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:16,768 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:26:16,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:16,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:16,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:16,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1265789014, now seen corresponding path program 1 times [2022-11-03 02:26:16,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:16,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439466618] [2022-11-03 02:26:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:16,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:16,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:16,989 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:16,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:26:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:17,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:26:17,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:17,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:17,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:17,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439466618] [2022-11-03 02:26:17,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439466618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:17,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:17,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:26:17,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935145526] [2022-11-03 02:26:17,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:17,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:26:17,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:26:17,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:26:17,398 INFO L87 Difference]: Start difference. First operand 366 states and 462 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) [2022-11-03 02:26:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:17,550 INFO L93 Difference]: Finished difference Result 378 states and 474 transitions. [2022-11-03 02:26:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:26:17,550 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 [2022-11-03 02:26:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:17,553 INFO L225 Difference]: With dead ends: 378 [2022-11-03 02:26:17,553 INFO L226 Difference]: Without dead ends: 376 [2022-11-03 02:26:17,553 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:26:17,554 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 13 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:17,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1546 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-03 02:26:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-11-03 02:26:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 347 states have (on average 1.2536023054755043) internal successors, (435), 353 states have internal predecessors, (435), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-03 02:26:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 472 transitions. [2022-11-03 02:26:17,579 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 472 transitions. Word has length 47 [2022-11-03 02:26:17,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:17,579 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 472 transitions. [2022-11-03 02:26:17,580 INFO L496 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) [2022-11-03 02:26:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 472 transitions. [2022-11-03 02:26:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:26:17,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:17,582 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:26:17,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:17,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:17,800 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1360052348, now seen corresponding path program 1 times [2022-11-03 02:26:17,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:17,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102581917] [2022-11-03 02:26:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:17,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:17,803 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:17,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:26:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:18,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:26:18,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:18,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:18,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:18,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102581917] [2022-11-03 02:26:18,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102581917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:18,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:18,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:26:18,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131058352] [2022-11-03 02:26:18,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:18,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:26:18,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:18,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:26:18,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:26:18,535 INFO L87 Difference]: Start difference. First operand 376 states and 472 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) [2022-11-03 02:26:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:18,896 INFO L93 Difference]: Finished difference Result 714 states and 905 transitions. [2022-11-03 02:26:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:26:18,897 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 [2022-11-03 02:26:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:18,900 INFO L225 Difference]: With dead ends: 714 [2022-11-03 02:26:18,900 INFO L226 Difference]: Without dead ends: 384 [2022-11-03 02:26:18,901 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:26:18,902 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 21 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:18,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1426 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:26:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-03 02:26:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 380. [2022-11-03 02:26:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 349 states have (on average 1.2521489971346704) internal successors, (437), 356 states have internal predecessors, (437), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-03 02:26:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 477 transitions. [2022-11-03 02:26:18,937 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 477 transitions. Word has length 62 [2022-11-03 02:26:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:18,939 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 477 transitions. [2022-11-03 02:26:18,940 INFO L496 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) [2022-11-03 02:26:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 477 transitions. [2022-11-03 02:26:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:26:18,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:18,945 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:26:18,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:19,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:19,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:19,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1778039099, now seen corresponding path program 1 times [2022-11-03 02:26:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:19,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564348450] [2022-11-03 02:26:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:19,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:19,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:19,161 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:19,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:26:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:19,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:26:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:19,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:19,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:19,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564348450] [2022-11-03 02:26:19,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564348450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:19,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:19,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:26:19,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534429700] [2022-11-03 02:26:19,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:19,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:19,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:19,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:26:19,850 INFO L87 Difference]: Start difference. First operand 380 states and 477 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) [2022-11-03 02:26:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:19,941 INFO L93 Difference]: Finished difference Result 717 states and 909 transitions. [2022-11-03 02:26:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:26:19,942 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 [2022-11-03 02:26:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:19,945 INFO L225 Difference]: With dead ends: 717 [2022-11-03 02:26:19,945 INFO L226 Difference]: Without dead ends: 384 [2022-11-03 02:26:19,946 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:26:19,947 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 3 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 932 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 [2022-11-03 02:26:19,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 932 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-03 02:26:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-11-03 02:26:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 352 states have (on average 1.2528409090909092) internal successors, (441), 360 states have internal predecessors, (441), 20 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 18 states have call predecessors, (21), 19 states have call successors, (21) [2022-11-03 02:26:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 482 transitions. [2022-11-03 02:26:19,971 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 482 transitions. Word has length 67 [2022-11-03 02:26:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:19,971 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 482 transitions. [2022-11-03 02:26:19,972 INFO L496 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) [2022-11-03 02:26:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 482 transitions. [2022-11-03 02:26:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:26:19,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:19,973 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:26:20,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:20,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:20,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1728183310, now seen corresponding path program 1 times [2022-11-03 02:26:20,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:20,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747386852] [2022-11-03 02:26:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:20,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:20,189 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:20,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:26:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:26:20,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:20,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:21,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747386852] [2022-11-03 02:26:21,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747386852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [592094120] [2022-11-03 02:26:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:21,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:21,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:26:21,072 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:26:21,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 02:26:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:21,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:26:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:26:22,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:26:22,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [592094120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910086929] [2022-11-03 02:26:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:22,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:22,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:22,432 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:22,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:26:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:26:22,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:26:23,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:23,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910086929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:23,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 02:26:23,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 7, 7] total 18 [2022-11-03 02:26:23,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219341504] [2022-11-03 02:26:23,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:23,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:23,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:23,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:23,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:26:23,053 INFO L87 Difference]: Start difference. First operand 384 states and 482 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) [2022-11-03 02:26:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:23,394 INFO L93 Difference]: Finished difference Result 1352 states and 1731 transitions. [2022-11-03 02:26:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:26:23,395 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 [2022-11-03 02:26:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:23,400 INFO L225 Difference]: With dead ends: 1352 [2022-11-03 02:26:23,401 INFO L226 Difference]: Without dead ends: 1015 [2022-11-03 02:26:23,402 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:26:23,403 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 574 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:23,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 1662 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:26:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-11-03 02:26:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 941. [2022-11-03 02:26:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 875 states have (on average 1.2697142857142858) internal successors, (1111), 889 states have internal predecessors, (1111), 44 states have call successors, (44), 13 states have call predecessors, (44), 18 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-11-03 02:26:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1202 transitions. [2022-11-03 02:26:23,479 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1202 transitions. Word has length 68 [2022-11-03 02:26:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:23,480 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1202 transitions. [2022-11-03 02:26:23,480 INFO L496 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) [2022-11-03 02:26:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1202 transitions. [2022-11-03 02:26:23,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 02:26:23,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:23,482 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:26:23,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:23,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:23,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:24,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:24,107 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:24,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1240088595, now seen corresponding path program 1 times [2022-11-03 02:26:24,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:24,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440358774] [2022-11-03 02:26:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:24,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:24,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:24,109 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:24,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:26:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:24,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:26:24,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:26:24,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:26:25,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440358774] [2022-11-03 02:26:25,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440358774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1361877282] [2022-11-03 02:26:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:25,156 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:25,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:26:25,157 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:26:25,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:26:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:26,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:26:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:26:26,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:26,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1361877282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:26,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:26:26,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:26:26,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349839161] [2022-11-03 02:26:26,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:26,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:26,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:26,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:26:26,149 INFO L87 Difference]: Start difference. First operand 941 states and 1202 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) [2022-11-03 02:26:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:26,243 INFO L93 Difference]: Finished difference Result 1838 states and 2358 transitions. [2022-11-03 02:26:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:26,244 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 [2022-11-03 02:26:26,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:26,252 INFO L225 Difference]: With dead ends: 1838 [2022-11-03 02:26:26,252 INFO L226 Difference]: Without dead ends: 944 [2022-11-03 02:26:26,254 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:26:26,258 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 0 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 625 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 [2022-11-03 02:26:26,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 625 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-11-03 02:26:26,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 944. [2022-11-03 02:26:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 878 states have (on average 1.2687927107061503) internal successors, (1114), 892 states have internal predecessors, (1114), 44 states have call successors, (44), 13 states have call predecessors, (44), 18 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-11-03 02:26:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1205 transitions. [2022-11-03 02:26:26,329 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1205 transitions. Word has length 95 [2022-11-03 02:26:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:26,329 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1205 transitions. [2022-11-03 02:26:26,330 INFO L496 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) [2022-11-03 02:26:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1205 transitions. [2022-11-03 02:26:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 02:26:26,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:26,341 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:26:26,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:26,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:26,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:26,742 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:26,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1633115605, now seen corresponding path program 1 times [2022-11-03 02:26:26,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:26,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93995094] [2022-11-03 02:26:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:26,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:26,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:26,744 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:26,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:26:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:27,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:26:27,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:26:27,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:26:27,952 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93995094] [2022-11-03 02:26:27,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93995094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:27,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1724960055] [2022-11-03 02:26:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:27,953 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:27,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:26:27,958 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:26:27,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:26:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:29,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:26:29,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:26:29,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:26:30,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1724960055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048801095] [2022-11-03 02:26:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:30,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:30,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:30,082 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:30,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:26:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:30,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:26:30,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:26:31,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:26:31,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048801095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:31,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:26:31,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 10, 8, 7] total 23 [2022-11-03 02:26:31,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277631344] [2022-11-03 02:26:31,347 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:26:31,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:26:31,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:31,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:26:31,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:26:31,349 INFO L87 Difference]: Start difference. First operand 944 states and 1205 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) [2022-11-03 02:26:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:40,457 INFO L93 Difference]: Finished difference Result 5834 states and 7597 transitions. [2022-11-03 02:26:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-03 02:26:40,458 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 [2022-11-03 02:26:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:40,477 INFO L225 Difference]: With dead ends: 5834 [2022-11-03 02:26:40,477 INFO L226 Difference]: Without dead ends: 4937 [2022-11-03 02:26:40,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2724, Invalid=10158, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 02:26:40,484 INFO L413 NwaCegarLoop]: 1185 mSDtfsCounter, 6458 mSDsluCounter, 14560 mSDsCounter, 0 mSdLazyCounter, 2603 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6500 SdHoareTripleChecker+Valid, 15745 SdHoareTripleChecker+Invalid, 3477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 2603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:40,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6500 Valid, 15745 Invalid, 3477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [874 Valid, 2603 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-03 02:26:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2022-11-03 02:26:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 3198. [2022-11-03 02:26:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 2999 states have (on average 1.2824274758252752) internal successors, (3846), 3031 states have internal predecessors, (3846), 140 states have call successors, (140), 50 states have call predecessors, (140), 55 states have return successors, (140), 116 states have call predecessors, (140), 130 states have call successors, (140) [2022-11-03 02:26:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4126 transitions. [2022-11-03 02:26:40,738 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4126 transitions. Word has length 95 [2022-11-03 02:26:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:40,739 INFO L495 AbstractCegarLoop]: Abstraction has 3198 states and 4126 transitions. [2022-11-03 02:26:40,739 INFO L496 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) [2022-11-03 02:26:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4126 transitions. [2022-11-03 02:26:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 02:26:40,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:40,742 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:26:40,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:40,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:41,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-03 02:26:41,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:41,367 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash -143770510, now seen corresponding path program 1 times [2022-11-03 02:26:41,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:41,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117230246] [2022-11-03 02:26:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:41,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:41,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:41,370 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:41,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:26:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:26:42,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:26:42,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:26:42,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:42,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117230246] [2022-11-03 02:26:42,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117230246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:42,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313119008] [2022-11-03 02:26:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:42,865 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:42,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:26:42,866 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:26:42,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:26:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:26:44,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:26:44,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:26:44,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [313119008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:44,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205985377] [2022-11-03 02:26:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:44,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:44,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:44,554 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:44,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:26:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:45,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:26:45,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:45,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:26:45,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:26:45,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:26:45,372 INFO L390 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 30 treesize of output 39 [2022-11-03 02:26:45,487 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:26:45,487 INFO L390 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 70 treesize of output 26 [2022-11-03 02:26:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:26:45,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:45,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205985377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:45,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 02:26:45,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 8, 8, 8] total 16 [2022-11-03 02:26:45,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051173510] [2022-11-03 02:26:45,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:45,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:45,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:45,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:26:45,530 INFO L87 Difference]: Start difference. First operand 3198 states and 4126 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) [2022-11-03 02:26:48,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:51,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:26:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:52,669 INFO L93 Difference]: Finished difference Result 4375 states and 5732 transitions. [2022-11-03 02:26:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:26:52,671 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 [2022-11-03 02:26:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:52,687 INFO L225 Difference]: With dead ends: 4375 [2022-11-03 02:26:52,687 INFO L226 Difference]: Without dead ends: 3959 [2022-11-03 02:26:52,689 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:26:52,690 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 136 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:52,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 815 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-11-03 02:26:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2022-11-03 02:26:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3216. [2022-11-03 02:26:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3017 states have (on average 1.2807424593967518) internal successors, (3864), 3049 states have internal predecessors, (3864), 140 states have call successors, (140), 50 states have call predecessors, (140), 55 states have return successors, (140), 116 states have call predecessors, (140), 130 states have call successors, (140) [2022-11-03 02:26:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 4144 transitions. [2022-11-03 02:26:52,959 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 4144 transitions. Word has length 104 [2022-11-03 02:26:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:52,960 INFO L495 AbstractCegarLoop]: Abstraction has 3216 states and 4144 transitions. [2022-11-03 02:26:52,960 INFO L496 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) [2022-11-03 02:26:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 4144 transitions. [2022-11-03 02:26:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:26:52,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:52,962 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:26:52,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:53,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:53,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:53,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:53,587 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:26:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:53,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1577750638, now seen corresponding path program 1 times [2022-11-03 02:26:53,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:53,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863243769] [2022-11-03 02:26:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:53,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:53,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:53,589 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:53,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:26:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:54,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:26:54,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:26:54,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:26:55,226 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:55,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863243769] [2022-11-03 02:26:55,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863243769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:55,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1317814600] [2022-11-03 02:26:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:55,227 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:26:55,232 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:26:55,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:26:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:56,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:26:56,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:26:57,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:26:57,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1317814600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971852889] [2022-11-03 02:26:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:57,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:57,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:57,218 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:57,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:26:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:58,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:26:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:26:58,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:26:58,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971852889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:58,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:26:58,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2022-11-03 02:26:58,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884253247] [2022-11-03 02:26:58,504 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:26:58,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:26:58,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:26:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:26:58,506 INFO L87 Difference]: Start difference. First operand 3216 states and 4144 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) [2022-11-03 02:27:00,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:00,535 INFO L93 Difference]: Finished difference Result 6617 states and 8581 transitions. [2022-11-03 02:27:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:27:00,537 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 [2022-11-03 02:27:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:00,548 INFO L225 Difference]: With dead ends: 6617 [2022-11-03 02:27:00,549 INFO L226 Difference]: Without dead ends: 3384 [2022-11-03 02:27:00,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 672 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:27:00,554 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 154 mSDsluCounter, 3114 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 3432 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:00,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 3432 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:27:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2022-11-03 02:27:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 3300. [2022-11-03 02:27:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 3101 states have (on average 1.2821670428893905) internal successors, (3976), 3133 states have internal predecessors, (3976), 140 states have call successors, (140), 50 states have call predecessors, (140), 55 states have return successors, (140), 116 states have call predecessors, (140), 130 states have call successors, (140) [2022-11-03 02:27:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 4256 transitions. [2022-11-03 02:27:00,829 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 4256 transitions. Word has length 116 [2022-11-03 02:27:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:00,830 INFO L495 AbstractCegarLoop]: Abstraction has 3300 states and 4256 transitions. [2022-11-03 02:27:00,830 INFO L496 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) [2022-11-03 02:27:00,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 4256 transitions. [2022-11-03 02:27:00,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 02:27:00,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:00,832 INFO L195 NwaCegarLoop]: 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] [2022-11-03 02:27:00,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:01,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:01,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:01,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:27:01,450 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:27:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash -859979886, now seen corresponding path program 2 times [2022-11-03 02:27:01,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:27:01,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375514894] [2022-11-03 02:27:01,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:27:01,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:27:01,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:27:01,453 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:27:01,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:27:03,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:27:03,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:27:03,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:27:03,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 128 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:27:03,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:27:05,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:27:05,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375514894] [2022-11-03 02:27:05,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375514894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:05,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2000669333] [2022-11-03 02:27:05,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:27:05,065 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:27:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:27:05,066 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:27:05,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f22ab0-675b-4992-8fb8-3c07ef90ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process