./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW --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 bcf02459061acfdf5a11fb9ee5e832193100590b0367d937f266d29520f326a3 --- 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-4e7fbc6 [2022-11-23 15:05:36,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:05:36,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:05:36,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:05:36,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:05:36,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:05:36,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:05:36,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:05:36,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:05:36,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:05:36,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:05:36,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:05:36,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:05:36,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:05:36,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:05:36,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:05:36,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:05:36,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:05:36,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:05:36,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:05:36,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:05:36,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:05:36,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:05:36,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:05:36,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:05:36,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:05:36,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:05:36,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:05:36,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:05:36,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:05:36,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:05:36,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:05:36,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:05:36,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:05:36,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:05:36,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:05:36,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:05:36,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:05:36,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:05:36,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:05:36,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:05:36,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:05:36,274 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:05:36,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:05:36,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:05:36,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:05:36,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:05:36,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:05:36,281 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:05:36,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:05:36,281 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:05:36,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:05:36,282 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:05:36,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:05:36,282 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:05:36,283 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:05:36,283 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:05:36,283 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:05:36,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:05:36,283 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:05:36,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:05:36,285 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:05:36,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:05:36,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:05:36,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:05:36,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:05:36,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:05:36,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:05:36,286 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:05:36,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:05:36,287 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:05:36,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:05:36,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:05:36,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:05:36,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:05:36,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:05:36,288 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:05:36,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:05:36,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:05:36,288 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:05:36,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:05:36,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:05:36,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:05:36,289 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_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcf02459061acfdf5a11fb9ee5e832193100590b0367d937f266d29520f326a3 [2022-11-23 15:05:36,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:05:36,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:05:36,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:05:36,576 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:05:36,576 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:05:36,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c [2022-11-23 15:05:39,628 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:05:39,960 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:05:39,961 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c [2022-11-23 15:05:39,993 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/data/e8d838d13/2d5f7002136d4056bbba45c95aa6e5f2/FLAG13190c8c4 [2022-11-23 15:05:40,014 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/data/e8d838d13/2d5f7002136d4056bbba45c95aa6e5f2 [2022-11-23 15:05:40,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:05:40,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:05:40,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:05:40,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:05:40,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:05:40,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:40,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1497c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40, skipping insertion in model container [2022-11-23 15:05:40,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:40,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:05:40,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:05:40,410 WARN L237 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_9f062408-90ef-48e0-8fab-6d46f616f8ef/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2022-11-23 15:05:40,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:05:40,713 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:05:40,779 WARN L237 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_9f062408-90ef-48e0-8fab-6d46f616f8ef/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2022-11-23 15:05:40,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:05:40,895 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:05:40,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40 WrapperNode [2022-11-23 15:05:40,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:05:40,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:05:40,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:05:40,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:05:40,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:40,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:40,998 INFO L138 Inliner]: procedures = 98, calls = 354, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 926 [2022-11-23 15:05:40,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:05:40,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:05:40,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:05:40,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:05:41,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:41,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:41,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:41,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:41,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:41,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:41,073 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:41,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:41,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:05:41,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:05:41,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:05:41,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:05:41,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (1/1) ... [2022-11-23 15:05:41,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:05:41,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:41,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:05:41,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:05:41,200 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 15:05:41,200 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 15:05:41,200 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:05:41,201 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:05:41,201 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:05:41,201 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:05:41,201 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:05:41,201 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:05:41,201 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:05:41,201 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:05:41,202 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:05:41,202 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:05:41,202 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 15:05:41,202 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 15:05:41,202 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 15:05:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 15:05:41,203 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:05:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:05:41,203 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:05:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:05:41,204 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-23 15:05:41,204 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-23 15:05:41,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:05:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-23 15:05:41,205 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-23 15:05:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 15:05:41,206 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 15:05:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-23 15:05:41,206 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-23 15:05:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:05:41,206 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:05:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:05:41,206 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:05:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-23 15:05:41,207 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-23 15:05:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:05:41,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:05:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:05:41,207 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:05:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:05:41,208 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:05:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:05:41,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:05:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:05:41,208 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:05:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:05:41,209 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:05:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:05:41,209 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:05:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:05:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:05:41,210 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:05:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-23 15:05:41,211 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-23 15:05:41,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:05:41,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:05:41,212 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:05:41,212 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:05:41,212 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-23 15:05:41,212 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-23 15:05:41,405 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:05:41,415 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:05:42,660 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:05:43,507 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:05:43,507 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:05:43,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:05:43 BoogieIcfgContainer [2022-11-23 15:05:43,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:05:43,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:05:43,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:05:43,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:05:43,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:05:40" (1/3) ... [2022-11-23 15:05:43,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7304bea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:05:43, skipping insertion in model container [2022-11-23 15:05:43,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:40" (2/3) ... [2022-11-23 15:05:43,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7304bea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:05:43, skipping insertion in model container [2022-11-23 15:05:43,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:05:43" (3/3) ... [2022-11-23 15:05:43,519 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product24.cil.c [2022-11-23 15:05:43,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:05:43,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:05:43,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:05:43,627 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;@6437bfa4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:05:43,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:05:43,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-23 15:05:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 15:05:43,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:43,655 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 15:05:43,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash 520183605, now seen corresponding path program 1 times [2022-11-23 15:05:43,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:43,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823312991] [2022-11-23 15:05:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:43,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:05:44,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:44,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823312991] [2022-11-23 15:05:44,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823312991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:44,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:44,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:05:44,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827487942] [2022-11-23 15:05:44,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:44,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:05:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:05:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:05:44,753 INFO L87 Difference]: Start difference. First operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-23 15:05:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:47,654 INFO L93 Difference]: Finished difference Result 1329 states and 2129 transitions. [2022-11-23 15:05:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:05:47,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-11-23 15:05:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:47,691 INFO L225 Difference]: With dead ends: 1329 [2022-11-23 15:05:47,692 INFO L226 Difference]: Without dead ends: 933 [2022-11-23 15:05:47,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:05:47,710 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1702 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:47,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1776 Valid, 996 Invalid, 2350 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [666 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 15:05:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-11-23 15:05:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 846. [2022-11-23 15:05:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 589 states have (on average 1.5823429541595926) internal successors, (932), 619 states have internal predecessors, (932), 207 states have call successors, (207), 48 states have call predecessors, (207), 49 states have return successors, (209), 191 states have call predecessors, (209), 202 states have call successors, (209) [2022-11-23 15:05:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1348 transitions. [2022-11-23 15:05:47,886 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1348 transitions. Word has length 54 [2022-11-23 15:05:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:47,887 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1348 transitions. [2022-11-23 15:05:47,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-23 15:05:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1348 transitions. [2022-11-23 15:05:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 15:05:47,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:47,897 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 15:05:47,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:05:47,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:47,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2131121629, now seen corresponding path program 1 times [2022-11-23 15:05:47,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:47,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153676029] [2022-11-23 15:05:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:47,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:05:48,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:48,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153676029] [2022-11-23 15:05:48,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153676029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:48,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:48,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:05:48,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439525823] [2022-11-23 15:05:48,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:48,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:05:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:05:48,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:05:48,600 INFO L87 Difference]: Start difference. First operand 846 states and 1348 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-23 15:05:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:52,518 INFO L93 Difference]: Finished difference Result 2916 states and 4689 transitions. [2022-11-23 15:05:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 15:05:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 98 [2022-11-23 15:05:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:52,539 INFO L225 Difference]: With dead ends: 2916 [2022-11-23 15:05:52,539 INFO L226 Difference]: Without dead ends: 2093 [2022-11-23 15:05:52,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:05:52,555 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 1441 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4829 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 5570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 4829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:52,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 2161 Invalid, 5570 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [741 Valid, 4829 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-23 15:05:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2022-11-23 15:05:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1906. [2022-11-23 15:05:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1290 states have (on average 1.5534883720930233) internal successors, (2004), 1362 states have internal predecessors, (2004), 512 states have call successors, (512), 91 states have call predecessors, (512), 103 states have return successors, (531), 485 states have call predecessors, (531), 507 states have call successors, (531) [2022-11-23 15:05:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3047 transitions. [2022-11-23 15:05:52,762 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3047 transitions. Word has length 98 [2022-11-23 15:05:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:52,763 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 3047 transitions. [2022-11-23 15:05:52,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-23 15:05:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3047 transitions. [2022-11-23 15:05:52,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 15:05:52,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:52,768 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 15:05:52,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:05:52,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1596055414, now seen corresponding path program 1 times [2022-11-23 15:05:52,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:52,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498107473] [2022-11-23 15:05:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:52,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:05:53,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:53,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498107473] [2022-11-23 15:05:53,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498107473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:53,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:53,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:05:53,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385068288] [2022-11-23 15:05:53,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:53,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:05:53,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:05:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:05:53,291 INFO L87 Difference]: Start difference. First operand 1906 states and 3047 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-23 15:05:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:55,913 INFO L93 Difference]: Finished difference Result 4803 states and 7696 transitions. [2022-11-23 15:05:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:05:55,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2022-11-23 15:05:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:55,940 INFO L225 Difference]: With dead ends: 4803 [2022-11-23 15:05:55,940 INFO L226 Difference]: Without dead ends: 2922 [2022-11-23 15:05:55,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:05:55,958 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1228 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:55,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1311 Valid, 1661 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 15:05:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2022-11-23 15:05:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2804. [2022-11-23 15:05:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 1924 states have (on average 1.5618503118503118) internal successors, (3005), 2023 states have internal predecessors, (3005), 714 states have call successors, (714), 145 states have call predecessors, (714), 165 states have return successors, (761), 679 states have call predecessors, (761), 709 states have call successors, (761) [2022-11-23 15:05:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4480 transitions. [2022-11-23 15:05:56,206 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4480 transitions. Word has length 99 [2022-11-23 15:05:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:56,207 INFO L495 AbstractCegarLoop]: Abstraction has 2804 states and 4480 transitions. [2022-11-23 15:05:56,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-23 15:05:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4480 transitions. [2022-11-23 15:05:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 15:05:56,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:56,214 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:05:56,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:05:56,215 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:56,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash 387870079, now seen corresponding path program 1 times [2022-11-23 15:05:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:56,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210507952] [2022-11-23 15:05:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:56,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:05:56,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:56,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210507952] [2022-11-23 15:05:56,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210507952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:56,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:56,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:05:56,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966782865] [2022-11-23 15:05:56,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:56,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:05:56,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:56,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:05:56,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:05:56,605 INFO L87 Difference]: Start difference. First operand 2804 states and 4480 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:05:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:57,459 INFO L93 Difference]: Finished difference Result 2905 states and 4646 transitions. [2022-11-23 15:05:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:05:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2022-11-23 15:05:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:57,485 INFO L225 Difference]: With dead ends: 2905 [2022-11-23 15:05:57,487 INFO L226 Difference]: Without dead ends: 2890 [2022-11-23 15:05:57,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:05:57,495 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 700 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:57,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1964 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:05:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2022-11-23 15:05:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2810. [2022-11-23 15:05:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 1930 states have (on average 1.560103626943005) internal successors, (3011), 2029 states have internal predecessors, (3011), 714 states have call successors, (714), 145 states have call predecessors, (714), 165 states have return successors, (761), 679 states have call predecessors, (761), 709 states have call successors, (761) [2022-11-23 15:05:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 4486 transitions. [2022-11-23 15:05:57,762 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 4486 transitions. Word has length 103 [2022-11-23 15:05:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:57,763 INFO L495 AbstractCegarLoop]: Abstraction has 2810 states and 4486 transitions. [2022-11-23 15:05:57,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:05:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 4486 transitions. [2022-11-23 15:05:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-23 15:05:57,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:57,768 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:05:57,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:05:57,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:57,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:57,769 INFO L85 PathProgramCache]: Analyzing trace with hash -797193323, now seen corresponding path program 1 times [2022-11-23 15:05:57,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:57,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767611269] [2022-11-23 15:05:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:57,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:05:58,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:58,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767611269] [2022-11-23 15:05:58,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767611269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:58,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:58,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 15:05:58,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292817423] [2022-11-23 15:05:58,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:58,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:05:58,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:58,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:05:58,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:05:58,421 INFO L87 Difference]: Start difference. First operand 2810 states and 4486 transitions. Second operand has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-23 15:06:05,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:05,332 INFO L93 Difference]: Finished difference Result 3235 states and 5128 transitions. [2022-11-23 15:06:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-23 15:06:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 108 [2022-11-23 15:06:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:05,355 INFO L225 Difference]: With dead ends: 3235 [2022-11-23 15:06:05,355 INFO L226 Difference]: Without dead ends: 3218 [2022-11-23 15:06:05,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 15:06:05,361 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 2782 mSDsluCounter, 3389 mSDsCounter, 0 mSdLazyCounter, 9437 mSolverCounterSat, 1644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2811 SdHoareTripleChecker+Valid, 3942 SdHoareTripleChecker+Invalid, 11081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1644 IncrementalHoareTripleChecker+Valid, 9437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:05,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2811 Valid, 3942 Invalid, 11081 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1644 Valid, 9437 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-23 15:06:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2022-11-23 15:06:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2998. [2022-11-23 15:06:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2072 states have (on average 1.5608108108108107) internal successors, (3234), 2169 states have internal predecessors, (3234), 731 states have call successors, (731), 175 states have call predecessors, (731), 194 states have return successors, (782), 697 states have call predecessors, (782), 726 states have call successors, (782) [2022-11-23 15:06:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4747 transitions. [2022-11-23 15:06:05,659 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4747 transitions. Word has length 108 [2022-11-23 15:06:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:05,660 INFO L495 AbstractCegarLoop]: Abstraction has 2998 states and 4747 transitions. [2022-11-23 15:06:05,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-23 15:06:05,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4747 transitions. [2022-11-23 15:06:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 15:06:05,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:05,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:05,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:06:05,666 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:05,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1226989648, now seen corresponding path program 1 times [2022-11-23 15:06:05,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:05,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256247498] [2022-11-23 15:06:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:05,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:06:09,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:09,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256247498] [2022-11-23 15:06:09,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256247498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:06:09,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772866106] [2022-11-23 15:06:09,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:09,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:09,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:09,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:06:09,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:06:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:10,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:06:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 15:06:10,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:06:10,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772866106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:10,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:06:10,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-11-23 15:06:10,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182379802] [2022-11-23 15:06:10,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:10,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:06:10,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:06:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:06:10,320 INFO L87 Difference]: Start difference. First operand 2998 states and 4747 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-23 15:06:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:10,784 INFO L93 Difference]: Finished difference Result 3161 states and 5014 transitions. [2022-11-23 15:06:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:06:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2022-11-23 15:06:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:10,804 INFO L225 Difference]: With dead ends: 3161 [2022-11-23 15:06:10,805 INFO L226 Difference]: Without dead ends: 3146 [2022-11-23 15:06:10,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:06:10,809 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 47 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:10,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1853 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:06:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-11-23 15:06:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 3012. [2022-11-23 15:06:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 2086 states have (on average 1.5570469798657718) internal successors, (3248), 2183 states have internal predecessors, (3248), 731 states have call successors, (731), 175 states have call predecessors, (731), 194 states have return successors, (782), 697 states have call predecessors, (782), 726 states have call successors, (782) [2022-11-23 15:06:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 4761 transitions. [2022-11-23 15:06:11,072 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 4761 transitions. Word has length 115 [2022-11-23 15:06:11,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:11,072 INFO L495 AbstractCegarLoop]: Abstraction has 3012 states and 4761 transitions. [2022-11-23 15:06:11,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-23 15:06:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 4761 transitions. [2022-11-23 15:06:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-23 15:06:11,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:11,077 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:11,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:06:11,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:11,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:11,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1796488684, now seen corresponding path program 1 times [2022-11-23 15:06:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:11,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106158529] [2022-11-23 15:06:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-23 15:06:13,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:13,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106158529] [2022-11-23 15:06:13,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106158529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:06:13,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265369203] [2022-11-23 15:06:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:13,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:13,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:13,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:06:13,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f062408-90ef-48e0-8fab-6d46f616f8ef/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:06:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:14,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-23 15:06:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 15:06:15,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:09:34,183 WARN L233 SmtUtils]: Spent 3.25m on a formula simplification. DAG size of input: 2889 DAG size of output: 109 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 15:12:50,422 WARN L233 SmtUtils]: Spent 3.23m on a formula simplification. DAG size of input: 2889 DAG size of output: 109 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 15:16:07,533 WARN L233 SmtUtils]: Spent 3.24m on a formula simplification. DAG size of input: 2885 DAG size of output: 105 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)