./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS --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 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- 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-8393723 [2022-11-19 07:10:56,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:10:56,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:10:56,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:10:56,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:10:56,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:10:56,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:10:56,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:10:56,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:10:56,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:10:56,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:10:56,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:10:56,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:10:56,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:10:56,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:10:56,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:10:56,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:10:56,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:10:56,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:10:56,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:10:56,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:10:56,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:10:56,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:10:56,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:10:56,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:10:56,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:10:56,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:10:56,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:10:56,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:10:56,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:10:56,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:10:56,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:10:56,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:10:56,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:10:56,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:10:56,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:10:56,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:10:56,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:10:56,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:10:56,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:10:56,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:10:56,194 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:10:56,234 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:10:56,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:10:56,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:10:56,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:10:56,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:10:56,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:10:56,239 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:10:56,240 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:10:56,240 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:10:56,240 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:10:56,241 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:10:56,242 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:10:56,242 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:10:56,242 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:10:56,242 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:10:56,243 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:10:56,243 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:10:56,243 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:10:56,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:10:56,244 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:10:56,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:10:56,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:10:56,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:10:56,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:10:56,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:10:56,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:10:56,246 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:10:56,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:10:56,248 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:10:56,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:10:56,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:10:56,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:10:56,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:10:56,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:10:56,249 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:10:56,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:10:56,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:10:56,250 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:10:56,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:10:56,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:10:56,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:10:56,251 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_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2022-11-19 07:10:56,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:10:56,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:10:56,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:10:56,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:10:56,602 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:10:56,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2022-11-19 07:10:56,690 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/data/d17ce4215/48119eda4cab4bfbab22dc735bdc5bd7/FLAGc7e3c7565 [2022-11-19 07:10:57,417 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:10:57,417 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2022-11-19 07:10:57,439 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/data/d17ce4215/48119eda4cab4bfbab22dc735bdc5bd7/FLAGc7e3c7565 [2022-11-19 07:10:57,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/data/d17ce4215/48119eda4cab4bfbab22dc735bdc5bd7 [2022-11-19 07:10:57,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:10:57,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:10:57,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:10:57,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:10:57,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:10:57,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:10:57" (1/1) ... [2022-11-19 07:10:57,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f3903c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:57, skipping insertion in model container [2022-11-19 07:10:57,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:10:57" (1/1) ... [2022-11-19 07:10:57,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:10:57,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:10:58,278 WARN L234 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_87fbf086-b3bc-4d89-8e51-241ce9999bba/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2022-11-19 07:10:58,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:10:58,301 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:10:58,420 WARN L234 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_87fbf086-b3bc-4d89-8e51-241ce9999bba/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2022-11-19 07:10:58,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:10:58,462 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:10:58,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58 WrapperNode [2022-11-19 07:10:58,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:10:58,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:10:58,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:10:58,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:10:58,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,584 INFO L138 Inliner]: procedures = 91, calls = 346, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 863 [2022-11-19 07:10:58,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:10:58,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:10:58,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:10:58,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:10:58,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,643 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:10:58,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:10:58,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:10:58,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:10:58,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (1/1) ... [2022-11-19 07:10:58,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:10:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:58,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:10:58,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:10:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:10:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-19 07:10:58,770 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-19 07:10:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-19 07:10:58,770 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-19 07:10:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 07:10:58,770 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 07:10:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 07:10:58,771 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 07:10:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-19 07:10:58,771 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-19 07:10:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 07:10:58,771 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 07:10:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 07:10:58,771 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 07:10:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 07:10:58,772 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 07:10:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 07:10:58,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 07:10:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 07:10:58,772 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 07:10:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 07:10:58,773 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 07:10:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 07:10:58,773 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 07:10:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-19 07:10:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-19 07:10:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 07:10:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 07:10:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-19 07:10:58,776 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-19 07:10:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 07:10:58,776 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 07:10:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2022-11-19 07:10:58,777 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2022-11-19 07:10:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 07:10:58,777 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 07:10:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 07:10:58,777 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 07:10:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 07:10:58,778 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 07:10:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:10:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-19 07:10:58,778 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-19 07:10:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 07:10:58,779 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 07:10:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 07:10:58,780 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 07:10:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 07:10:58,781 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 07:10:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:10:58,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:10:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 07:10:58,782 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 07:10:58,928 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:10:58,930 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:11:00,230 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:11:01,043 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:11:01,044 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:11:01,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:11:01 BoogieIcfgContainer [2022-11-19 07:11:01,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:11:01,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:11:01,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:11:01,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:11:01,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:10:57" (1/3) ... [2022-11-19 07:11:01,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7532b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:11:01, skipping insertion in model container [2022-11-19 07:11:01,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:10:58" (2/3) ... [2022-11-19 07:11:01,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7532b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:11:01, skipping insertion in model container [2022-11-19 07:11:01,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:11:01" (3/3) ... [2022-11-19 07:11:01,061 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2022-11-19 07:11:01,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:11:01,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:11:01,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:11:01,155 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;@2570d3cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:11:01,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:11:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-19 07:11:01,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:11:01,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:01,174 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] [2022-11-19 07:11:01,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:01,182 INFO L85 PathProgramCache]: Analyzing trace with hash -657220948, now seen corresponding path program 1 times [2022-11-19 07:11:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:01,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138082571] [2022-11-19 07:11:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:01,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:02,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:02,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138082571] [2022-11-19 07:11:02,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138082571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:02,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863800004] [2022-11-19 07:11:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:02,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:02,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:02,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:02,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:11:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:02,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:11:02,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:02,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:02,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863800004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:02,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:02,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:11:02,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098996760] [2022-11-19 07:11:02,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:02,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:02,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:02,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:02,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:11:02,614 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:11:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:03,007 INFO L93 Difference]: Finished difference Result 1095 states and 1764 transitions. [2022-11-19 07:11:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:03,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-11-19 07:11:03,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:03,029 INFO L225 Difference]: With dead ends: 1095 [2022-11-19 07:11:03,030 INFO L226 Difference]: Without dead ends: 707 [2022-11-19 07:11:03,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:11:03,041 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 587 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:03,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1151 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-11-19 07:11:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2022-11-19 07:11:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 470 states have (on average 1.5829787234042554) internal successors, (744), 505 states have internal predecessors, (744), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2022-11-19 07:11:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1106 transitions. [2022-11-19 07:11:03,150 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1106 transitions. Word has length 45 [2022-11-19 07:11:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:03,151 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1106 transitions. [2022-11-19 07:11:03,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:11:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1106 transitions. [2022-11-19 07:11:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:11:03,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:03,155 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] [2022-11-19 07:11:03,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:03,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 07:11:03,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:03,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1847079599, now seen corresponding path program 1 times [2022-11-19 07:11:03,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:03,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076643809] [2022-11-19 07:11:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:03,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:03,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:03,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076643809] [2022-11-19 07:11:03,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076643809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:03,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:03,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:11:03,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899426019] [2022-11-19 07:11:03,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:03,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:03,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:03,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:03,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:03,754 INFO L87 Difference]: Start difference. First operand 695 states and 1106 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 07:11:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:04,119 INFO L93 Difference]: Finished difference Result 2057 states and 3312 transitions. [2022-11-19 07:11:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:04,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2022-11-19 07:11:04,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:04,132 INFO L225 Difference]: With dead ends: 2057 [2022-11-19 07:11:04,132 INFO L226 Difference]: Without dead ends: 1374 [2022-11-19 07:11:04,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:04,137 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 576 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:04,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1264 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-11-19 07:11:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1290. [2022-11-19 07:11:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 903 states have (on average 1.6046511627906976) internal successors, (1449), 957 states have internal predecessors, (1449), 311 states have call successors, (311), 76 states have call predecessors, (311), 75 states have return successors, (330), 286 states have call predecessors, (330), 307 states have call successors, (330) [2022-11-19 07:11:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2090 transitions. [2022-11-19 07:11:04,237 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2090 transitions. Word has length 46 [2022-11-19 07:11:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:04,238 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 2090 transitions. [2022-11-19 07:11:04,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 07:11:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2090 transitions. [2022-11-19 07:11:04,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:11:04,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:04,249 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:04,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:11:04,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:04,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1796690915, now seen corresponding path program 1 times [2022-11-19 07:11:04,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:04,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669537191] [2022-11-19 07:11:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:04,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:04,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:04,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669537191] [2022-11-19 07:11:04,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669537191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:04,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:04,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:11:04,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787481717] [2022-11-19 07:11:04,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:04,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:04,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:11:04,618 INFO L87 Difference]: Start difference. First operand 1290 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 07:11:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:04,953 INFO L93 Difference]: Finished difference Result 2993 states and 4835 transitions. [2022-11-19 07:11:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:11:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2022-11-19 07:11:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:04,968 INFO L225 Difference]: With dead ends: 2993 [2022-11-19 07:11:04,968 INFO L226 Difference]: Without dead ends: 1715 [2022-11-19 07:11:04,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:11:04,982 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 435 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:04,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 1602 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-11-19 07:11:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1673. [2022-11-19 07:11:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1167 states have (on average 1.5569837189374465) internal successors, (1817), 1221 states have internal predecessors, (1817), 394 states have call successors, (394), 104 states have call predecessors, (394), 111 states have return successors, (472), 375 states have call predecessors, (472), 388 states have call successors, (472) [2022-11-19 07:11:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2683 transitions. [2022-11-19 07:11:05,136 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2683 transitions. Word has length 69 [2022-11-19 07:11:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:05,138 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2683 transitions. [2022-11-19 07:11:05,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 07:11:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2683 transitions. [2022-11-19 07:11:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:11:05,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:05,143 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:05,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:11:05,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1529415749, now seen corresponding path program 1 times [2022-11-19 07:11:05,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:05,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646897425] [2022-11-19 07:11:05,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:05,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:05,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646897425] [2022-11-19 07:11:05,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646897425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:05,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:05,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:11:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113974861] [2022-11-19 07:11:05,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:05,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:11:05,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:05,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:11:05,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:11:05,657 INFO L87 Difference]: Start difference. First operand 1673 states and 2683 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 07:11:06,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:06,808 INFO L93 Difference]: Finished difference Result 4466 states and 7499 transitions. [2022-11-19 07:11:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:11:06,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2022-11-19 07:11:06,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:06,838 INFO L225 Difference]: With dead ends: 4466 [2022-11-19 07:11:06,839 INFO L226 Difference]: Without dead ends: 2805 [2022-11-19 07:11:06,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:11:06,859 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 644 mSDsluCounter, 2542 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 3274 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:06,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 3274 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:11:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-11-19 07:11:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2429. [2022-11-19 07:11:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 1700 states have (on average 1.5488235294117647) internal successors, (2633), 1786 states have internal predecessors, (2633), 564 states have call successors, (564), 153 states have call predecessors, (564), 164 states have return successors, (735), 533 states have call predecessors, (735), 556 states have call successors, (735) [2022-11-19 07:11:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 3932 transitions. [2022-11-19 07:11:07,113 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 3932 transitions. Word has length 70 [2022-11-19 07:11:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:07,115 INFO L495 AbstractCegarLoop]: Abstraction has 2429 states and 3932 transitions. [2022-11-19 07:11:07,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 07:11:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 3932 transitions. [2022-11-19 07:11:07,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:11:07,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:07,120 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:07,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:11:07,120 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash -589147921, now seen corresponding path program 1 times [2022-11-19 07:11:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:07,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376781455] [2022-11-19 07:11:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:07,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:07,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376781455] [2022-11-19 07:11:07,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376781455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:07,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468091089] [2022-11-19 07:11:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:07,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:07,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:07,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:07,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:11:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:11:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:07,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:07,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468091089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:07,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:07,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:11:07,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869731125] [2022-11-19 07:11:07,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:07,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:07,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:07,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:11:07,999 INFO L87 Difference]: Start difference. First operand 2429 states and 3932 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:11:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:08,371 INFO L93 Difference]: Finished difference Result 5961 states and 9966 transitions. [2022-11-19 07:11:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:08,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2022-11-19 07:11:08,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:08,402 INFO L225 Difference]: With dead ends: 5961 [2022-11-19 07:11:08,403 INFO L226 Difference]: Without dead ends: 3544 [2022-11-19 07:11:08,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:11:08,423 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 553 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:08,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1138 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-11-19 07:11:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 3399. [2022-11-19 07:11:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 2393 states have (on average 1.5436690346844963) internal successors, (3694), 2523 states have internal predecessors, (3694), 772 states have call successors, (772), 210 states have call predecessors, (772), 233 states have return successors, (1044), 731 states have call predecessors, (1044), 764 states have call successors, (1044) [2022-11-19 07:11:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5510 transitions. [2022-11-19 07:11:08,692 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5510 transitions. Word has length 70 [2022-11-19 07:11:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:08,693 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 5510 transitions. [2022-11-19 07:11:08,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:11:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5510 transitions. [2022-11-19 07:11:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 07:11:08,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:08,699 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:08,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:08,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:08,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:08,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2145970690, now seen corresponding path program 1 times [2022-11-19 07:11:08,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:08,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304322490] [2022-11-19 07:11:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:08,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:09,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:09,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304322490] [2022-11-19 07:11:09,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304322490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:09,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507374649] [2022-11-19 07:11:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:09,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:09,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:09,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:09,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:11:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:09,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:11:09,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:09,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:09,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507374649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:09,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:09,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-19 07:11:09,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230021479] [2022-11-19 07:11:09,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:09,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:09,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:09,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:11:09,756 INFO L87 Difference]: Start difference. First operand 3399 states and 5510 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-19 07:11:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:10,605 INFO L93 Difference]: Finished difference Result 8797 states and 14640 transitions. [2022-11-19 07:11:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:11:10,606 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), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-11-19 07:11:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:10,652 INFO L225 Difference]: With dead ends: 8797 [2022-11-19 07:11:10,652 INFO L226 Difference]: Without dead ends: 5410 [2022-11-19 07:11:10,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:11:10,682 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 498 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:10,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1816 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:11:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2022-11-19 07:11:11,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 5226. [2022-11-19 07:11:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5226 states, 3685 states have (on average 1.5042062415196744) internal successors, (5543), 3905 states have internal predecessors, (5543), 1184 states have call successors, (1184), 336 states have call predecessors, (1184), 356 states have return successors, (1571), 1090 states have call predecessors, (1571), 1173 states have call successors, (1571) [2022-11-19 07:11:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 8298 transitions. [2022-11-19 07:11:11,103 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 8298 transitions. Word has length 71 [2022-11-19 07:11:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:11,103 INFO L495 AbstractCegarLoop]: Abstraction has 5226 states and 8298 transitions. [2022-11-19 07:11:11,103 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), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-19 07:11:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 8298 transitions. [2022-11-19 07:11:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 07:11:11,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:11,107 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:11,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:11,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:11,316 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:11,317 INFO L85 PathProgramCache]: Analyzing trace with hash -420849600, now seen corresponding path program 1 times [2022-11-19 07:11:11,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:11,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173375195] [2022-11-19 07:11:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:11,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:12,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:12,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173375195] [2022-11-19 07:11:12,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173375195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:12,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738141311] [2022-11-19 07:11:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:12,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:12,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:12,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:12,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:11:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:12,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:11:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:12,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:12,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738141311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:12,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:12,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-19 07:11:12,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290424481] [2022-11-19 07:11:12,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:12,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:12,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:12,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:12,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:11:12,552 INFO L87 Difference]: Start difference. First operand 5226 states and 8298 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 07:11:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:13,286 INFO L93 Difference]: Finished difference Result 10338 states and 16814 transitions. [2022-11-19 07:11:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:11:13,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2022-11-19 07:11:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:13,341 INFO L225 Difference]: With dead ends: 10338 [2022-11-19 07:11:13,341 INFO L226 Difference]: Without dead ends: 6291 [2022-11-19 07:11:13,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:13,372 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 117 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:13,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1752 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:13,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2022-11-19 07:11:13,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 5256. [2022-11-19 07:11:13,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 3715 states have (on average 1.5001345895020188) internal successors, (5573), 3935 states have internal predecessors, (5573), 1184 states have call successors, (1184), 336 states have call predecessors, (1184), 356 states have return successors, (1571), 1090 states have call predecessors, (1571), 1173 states have call successors, (1571) [2022-11-19 07:11:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 8328 transitions. [2022-11-19 07:11:14,020 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 8328 transitions. Word has length 80 [2022-11-19 07:11:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:14,021 INFO L495 AbstractCegarLoop]: Abstraction has 5256 states and 8328 transitions. [2022-11-19 07:11:14,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 07:11:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 8328 transitions. [2022-11-19 07:11:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-19 07:11:14,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:14,029 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:11:14,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:14,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 07:11:14,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:14,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1190523333, now seen corresponding path program 1 times [2022-11-19 07:11:14,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:14,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872719053] [2022-11-19 07:11:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:14,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:11:14,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872719053] [2022-11-19 07:11:14,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872719053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:14,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390836689] [2022-11-19 07:11:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:14,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:14,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:14,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:15,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:11:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:15,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:11:15,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:11:15,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:11:16,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390836689] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:16,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:11:16,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2022-11-19 07:11:16,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758260673] [2022-11-19 07:11:16,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:16,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:11:16,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:16,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:11:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:11:16,032 INFO L87 Difference]: Start difference. First operand 5256 states and 8328 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-19 07:11:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:18,970 INFO L93 Difference]: Finished difference Result 10919 states and 17521 transitions. [2022-11-19 07:11:18,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:11:18,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 84 [2022-11-19 07:11:18,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:19,042 INFO L225 Difference]: With dead ends: 10919 [2022-11-19 07:11:19,042 INFO L226 Difference]: Without dead ends: 6860 [2022-11-19 07:11:19,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:11:19,070 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 1373 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:19,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1458 Valid, 1936 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1902 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 07:11:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6860 states. [2022-11-19 07:11:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6860 to 5891. [2022-11-19 07:11:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5891 states, 4170 states have (on average 1.484412470023981) internal successors, (6190), 4433 states have internal predecessors, (6190), 1312 states have call successors, (1312), 360 states have call predecessors, (1312), 408 states have return successors, (1825), 1200 states have call predecessors, (1825), 1301 states have call successors, (1825) [2022-11-19 07:11:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5891 states to 5891 states and 9327 transitions. [2022-11-19 07:11:19,671 INFO L78 Accepts]: Start accepts. Automaton has 5891 states and 9327 transitions. Word has length 84 [2022-11-19 07:11:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:19,671 INFO L495 AbstractCegarLoop]: Abstraction has 5891 states and 9327 transitions. [2022-11-19 07:11:19,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-19 07:11:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 5891 states and 9327 transitions. [2022-11-19 07:11:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:11:19,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:19,675 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:19,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:19,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 07:11:19,884 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2108083562, now seen corresponding path program 1 times [2022-11-19 07:11:19,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:19,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566036041] [2022-11-19 07:11:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:19,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:11:20,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:20,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566036041] [2022-11-19 07:11:20,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566036041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:20,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337567736] [2022-11-19 07:11:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:20,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:20,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:20,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:20,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:11:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:21,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:11:21,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:11:21,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:11:22,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337567736] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:22,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:11:22,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2022-11-19 07:11:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21075723] [2022-11-19 07:11:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:22,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:11:22,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:22,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:11:22,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:11:22,017 INFO L87 Difference]: Start difference. First operand 5891 states and 9327 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 07:11:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:27,340 INFO L93 Difference]: Finished difference Result 17211 states and 30127 transitions. [2022-11-19 07:11:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:11:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-11-19 07:11:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:27,446 INFO L225 Difference]: With dead ends: 17211 [2022-11-19 07:11:27,447 INFO L226 Difference]: Without dead ends: 12955 [2022-11-19 07:11:27,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:11:27,488 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 2655 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 1270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2744 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 4281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1270 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:27,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2744 Valid, 3096 Invalid, 4281 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1270 Valid, 3011 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-19 07:11:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12955 states. [2022-11-19 07:11:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12955 to 11319. [2022-11-19 07:11:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11319 states, 8141 states have (on average 1.4921999754329935) internal successors, (12148), 8596 states have internal predecessors, (12148), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 811 states have return successors, (4153), 2201 states have call predecessors, (4153), 2349 states have call successors, (4153) [2022-11-19 07:11:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11319 states to 11319 states and 18667 transitions. [2022-11-19 07:11:28,963 INFO L78 Accepts]: Start accepts. Automaton has 11319 states and 18667 transitions. Word has length 87 [2022-11-19 07:11:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:28,964 INFO L495 AbstractCegarLoop]: Abstraction has 11319 states and 18667 transitions. [2022-11-19 07:11:28,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 07:11:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 11319 states and 18667 transitions. [2022-11-19 07:11:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 07:11:28,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:28,970 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:28,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:29,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:29,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1803028452, now seen corresponding path program 1 times [2022-11-19 07:11:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:29,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090015944] [2022-11-19 07:11:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:29,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:11:30,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:30,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090015944] [2022-11-19 07:11:30,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090015944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:30,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104331532] [2022-11-19 07:11:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:30,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:30,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:30,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:30,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:11:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:30,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:11:30,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:11:30,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:11:31,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104331532] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:31,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:11:31,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2022-11-19 07:11:31,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702170654] [2022-11-19 07:11:31,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:31,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:11:31,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:31,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:11:31,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:11:31,073 INFO L87 Difference]: Start difference. First operand 11319 states and 18667 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, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-19 07:11:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:33,849 INFO L93 Difference]: Finished difference Result 22566 states and 37839 transitions. [2022-11-19 07:11:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:11:33,850 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, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-11-19 07:11:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:33,961 INFO L225 Difference]: With dead ends: 22566 [2022-11-19 07:11:33,961 INFO L226 Difference]: Without dead ends: 12882 [2022-11-19 07:11:34,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:11:34,034 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 1229 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:34,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 1635 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 07:11:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12882 states. [2022-11-19 07:11:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12882 to 11319. [2022-11-19 07:11:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11319 states, 8141 states have (on average 1.4921999754329935) internal successors, (12148), 8596 states have internal predecessors, (12148), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 811 states have return successors, (4141), 2201 states have call predecessors, (4141), 2349 states have call successors, (4141) [2022-11-19 07:11:35,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11319 states to 11319 states and 18655 transitions. [2022-11-19 07:11:35,429 INFO L78 Accepts]: Start accepts. Automaton has 11319 states and 18655 transitions. Word has length 91 [2022-11-19 07:11:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:35,430 INFO L495 AbstractCegarLoop]: Abstraction has 11319 states and 18655 transitions. [2022-11-19 07:11:35,430 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, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-19 07:11:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11319 states and 18655 transitions. [2022-11-19 07:11:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:11:35,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:35,437 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:11:35,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:35,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:11:35,645 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:35,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:35,646 INFO L85 PathProgramCache]: Analyzing trace with hash 463867080, now seen corresponding path program 1 times [2022-11-19 07:11:35,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:35,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033423772] [2022-11-19 07:11:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:35,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:11:36,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:36,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033423772] [2022-11-19 07:11:36,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033423772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:36,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686555211] [2022-11-19 07:11:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:36,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:36,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:36,326 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:36,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:11:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:36,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:11:36,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:11:36,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:36,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686555211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:36,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:36,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-19 07:11:36,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603436413] [2022-11-19 07:11:36,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:36,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:11:36,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:11:36,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:36,785 INFO L87 Difference]: Start difference. First operand 11319 states and 18655 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 07:11:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:37,911 INFO L93 Difference]: Finished difference Result 21798 states and 37277 transitions. [2022-11-19 07:11:37,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:11:37,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 111 [2022-11-19 07:11:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:38,020 INFO L225 Difference]: With dead ends: 21798 [2022-11-19 07:11:38,020 INFO L226 Difference]: Without dead ends: 11694 [2022-11-19 07:11:38,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:38,109 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 2 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:38,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2262 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11694 states. [2022-11-19 07:11:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11694 to 11541. [2022-11-19 07:11:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11541 states, 8291 states have (on average 1.483295139307683) internal successors, (12298), 8779 states have internal predecessors, (12298), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 883 states have return successors, (4623), 2240 states have call predecessors, (4623), 2349 states have call successors, (4623) [2022-11-19 07:11:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11541 states to 11541 states and 19287 transitions. [2022-11-19 07:11:39,635 INFO L78 Accepts]: Start accepts. Automaton has 11541 states and 19287 transitions. Word has length 111 [2022-11-19 07:11:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:39,636 INFO L495 AbstractCegarLoop]: Abstraction has 11541 states and 19287 transitions. [2022-11-19 07:11:39,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 07:11:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 11541 states and 19287 transitions. [2022-11-19 07:11:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:11:39,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:39,650 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 07:11:39,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:39,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:39,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash -515708313, now seen corresponding path program 1 times [2022-11-19 07:11:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:39,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124574808] [2022-11-19 07:11:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:11:40,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:40,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124574808] [2022-11-19 07:11:40,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124574808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:40,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37052627] [2022-11-19 07:11:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:40,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:40,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:40,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:40,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:11:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:40,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:11:40,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:11:40,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:40,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37052627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:40,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:40,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-19 07:11:40,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158726916] [2022-11-19 07:11:40,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:40,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:40,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:40,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:40,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:11:40,968 INFO L87 Difference]: Start difference. First operand 11541 states and 19287 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:11:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:42,089 INFO L93 Difference]: Finished difference Result 23853 states and 41402 transitions. [2022-11-19 07:11:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:11:42,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 122 [2022-11-19 07:11:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:42,178 INFO L225 Difference]: With dead ends: 23853 [2022-11-19 07:11:42,178 INFO L226 Difference]: Without dead ends: 11188 [2022-11-19 07:11:42,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:42,258 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 241 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:42,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1585 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11188 states. [2022-11-19 07:11:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11188 to 11155. [2022-11-19 07:11:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 7979 states have (on average 1.452562977816769) internal successors, (11590), 8457 states have internal predecessors, (11590), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-11-19 07:11:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 18322 transitions. [2022-11-19 07:11:43,430 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 18322 transitions. Word has length 122 [2022-11-19 07:11:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:43,430 INFO L495 AbstractCegarLoop]: Abstraction has 11155 states and 18322 transitions. [2022-11-19 07:11:43,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:11:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 18322 transitions. [2022-11-19 07:11:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 07:11:43,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:43,443 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 07:11:43,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:43,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:11:43,652 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:43,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1314652631, now seen corresponding path program 1 times [2022-11-19 07:11:43,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:43,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126055705] [2022-11-19 07:11:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:43,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:11:44,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:44,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126055705] [2022-11-19 07:11:44,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126055705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:44,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008181093] [2022-11-19 07:11:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:44,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:44,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:44,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:44,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:11:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:44,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:11:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:11:44,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:44,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008181093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:44,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:44,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-19 07:11:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996372355] [2022-11-19 07:11:44,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:44,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:44,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:44,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:11:44,783 INFO L87 Difference]: Start difference. First operand 11155 states and 18322 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:11:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:46,199 INFO L93 Difference]: Finished difference Result 23289 states and 39619 transitions. [2022-11-19 07:11:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:11:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 126 [2022-11-19 07:11:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:46,304 INFO L225 Difference]: With dead ends: 23289 [2022-11-19 07:11:46,304 INFO L226 Difference]: Without dead ends: 11155 [2022-11-19 07:11:46,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:46,415 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 239 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:46,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1554 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11155 states. [2022-11-19 07:11:47,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11155 to 11155. [2022-11-19 07:11:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 7979 states have (on average 1.4167188870785812) internal successors, (11304), 8457 states have internal predecessors, (11304), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-11-19 07:11:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 18036 transitions. [2022-11-19 07:11:47,426 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 18036 transitions. Word has length 126 [2022-11-19 07:11:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:47,427 INFO L495 AbstractCegarLoop]: Abstraction has 11155 states and 18036 transitions. [2022-11-19 07:11:47,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:11:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 18036 transitions. [2022-11-19 07:11:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-19 07:11:47,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:47,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:11:47,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:47,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:11:47,647 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:47,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1739786144, now seen corresponding path program 1 times [2022-11-19 07:11:47,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:47,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522372765] [2022-11-19 07:11:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:11:47,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:47,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522372765] [2022-11-19 07:11:47,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522372765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:47,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455139873] [2022-11-19 07:11:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:47,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:47,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:47,947 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:47,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:11:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:48,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:11:48,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:11:48,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:48,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455139873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:48,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:48,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-19 07:11:48,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987020574] [2022-11-19 07:11:48,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:48,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:11:48,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:48,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:11:48,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:11:48,572 INFO L87 Difference]: Start difference. First operand 11155 states and 18036 transitions. Second operand has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-19 07:11:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:52,558 INFO L93 Difference]: Finished difference Result 24266 states and 40023 transitions. [2022-11-19 07:11:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:11:52,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 130 [2022-11-19 07:11:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:52,659 INFO L225 Difference]: With dead ends: 24266 [2022-11-19 07:11:52,660 INFO L226 Difference]: Without dead ends: 13081 [2022-11-19 07:11:52,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:11:52,725 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1134 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 3345 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 3820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 3345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:52,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 1450 Invalid, 3820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 3345 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-19 07:11:52,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13081 states. [2022-11-19 07:11:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13081 to 11140. [2022-11-19 07:11:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11140 states, 7964 states have (on average 1.4171270718232045) internal successors, (11286), 8442 states have internal predecessors, (11286), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-11-19 07:11:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11140 states to 11140 states and 18018 transitions. [2022-11-19 07:11:53,798 INFO L78 Accepts]: Start accepts. Automaton has 11140 states and 18018 transitions. Word has length 130 [2022-11-19 07:11:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:53,799 INFO L495 AbstractCegarLoop]: Abstraction has 11140 states and 18018 transitions. [2022-11-19 07:11:53,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-19 07:11:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 11140 states and 18018 transitions. [2022-11-19 07:11:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-19 07:11:53,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:53,814 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:11:53,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:11:54,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:11:54,025 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:54,025 INFO L85 PathProgramCache]: Analyzing trace with hash 998206594, now seen corresponding path program 1 times [2022-11-19 07:11:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:54,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829554200] [2022-11-19 07:11:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:54,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 07:11:54,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:54,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829554200] [2022-11-19 07:11:54,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829554200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:54,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792624911] [2022-11-19 07:11:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:54,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:54,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:54,892 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:54,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:11:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:55,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:11:55,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:11:55,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:11:55,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792624911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:55,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:11:55,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-11-19 07:11:55,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519116233] [2022-11-19 07:11:55,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:55,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:55,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:55,514 INFO L87 Difference]: Start difference. First operand 11140 states and 18018 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-19 07:11:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:56,734 INFO L93 Difference]: Finished difference Result 26182 states and 43889 transitions. [2022-11-19 07:11:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:56,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 137 [2022-11-19 07:11:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:56,853 INFO L225 Difference]: With dead ends: 26182 [2022-11-19 07:11:56,853 INFO L226 Difference]: Without dead ends: 15054 [2022-11-19 07:11:56,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:11:56,942 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 462 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:56,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1321 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2022-11-19 07:11:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 14738. [2022-11-19 07:11:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14738 states, 10553 states have (on average 1.4159954515303705) internal successors, (14943), 11212 states have internal predecessors, (14943), 3035 states have call successors, (3035), 873 states have call predecessors, (3035), 1149 states have return successors, (5986), 2872 states have call predecessors, (5986), 3018 states have call successors, (5986) [2022-11-19 07:11:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14738 states to 14738 states and 23964 transitions. [2022-11-19 07:11:58,433 INFO L78 Accepts]: Start accepts. Automaton has 14738 states and 23964 transitions. Word has length 137 [2022-11-19 07:11:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:58,434 INFO L495 AbstractCegarLoop]: Abstraction has 14738 states and 23964 transitions. [2022-11-19 07:11:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-19 07:11:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 14738 states and 23964 transitions. [2022-11-19 07:11:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:11:58,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:58,451 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:11:58,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:11:58,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:11:58,660 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash 249318544, now seen corresponding path program 1 times [2022-11-19 07:11:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:58,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998990689] [2022-11-19 07:11:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:58,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 07:11:59,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998990689] [2022-11-19 07:11:59,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998990689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122146198] [2022-11-19 07:11:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:59,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:59,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:59,471 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:59,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:11:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:59,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:11:59,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:12:00,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 07:12:00,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122146198] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:00,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:12:00,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 19 [2022-11-19 07:12:00,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612572398] [2022-11-19 07:12:00,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:00,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:12:00,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:00,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:12:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:12:00,451 INFO L87 Difference]: Start difference. First operand 14738 states and 23964 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-19 07:12:05,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:05,966 INFO L93 Difference]: Finished difference Result 38197 states and 67453 transitions. [2022-11-19 07:12:05,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:12:05,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 142 [2022-11-19 07:12:05,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:06,148 INFO L225 Difference]: With dead ends: 38197 [2022-11-19 07:12:06,148 INFO L226 Difference]: Without dead ends: 25677 [2022-11-19 07:12:06,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:12:06,292 INFO L413 NwaCegarLoop]: 803 mSDtfsCounter, 1922 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 3221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 839 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:06,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1992 Valid, 1887 Invalid, 3221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [839 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-19 07:12:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2022-11-19 07:12:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 22811. [2022-11-19 07:12:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22811 states, 16183 states have (on average 1.4181548538589879) internal successors, (22950), 17233 states have internal predecessors, (22950), 4810 states have call successors, (4810), 1445 states have call predecessors, (4810), 1817 states have return successors, (9505), 4512 states have call predecessors, (9505), 4784 states have call successors, (9505) [2022-11-19 07:12:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22811 states to 22811 states and 37265 transitions. [2022-11-19 07:12:08,697 INFO L78 Accepts]: Start accepts. Automaton has 22811 states and 37265 transitions. Word has length 142 [2022-11-19 07:12:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:08,698 INFO L495 AbstractCegarLoop]: Abstraction has 22811 states and 37265 transitions. [2022-11-19 07:12:08,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-19 07:12:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 22811 states and 37265 transitions. [2022-11-19 07:12:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:12:08,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:08,720 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:08,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:08,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:08,929 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:08,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1816926827, now seen corresponding path program 1 times [2022-11-19 07:12:08,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:08,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967802957] [2022-11-19 07:12:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:08,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 07:12:09,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:09,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967802957] [2022-11-19 07:12:09,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967802957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:09,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713266743] [2022-11-19 07:12:09,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:09,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:09,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:09,976 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:10,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:12:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:10,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 2362 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:12:10,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:12:10,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:10,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713266743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:10,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:10,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-11-19 07:12:10,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85146032] [2022-11-19 07:12:10,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:10,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:10,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:10,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:10,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:12:10,477 INFO L87 Difference]: Start difference. First operand 22811 states and 37265 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 07:12:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:13,119 INFO L93 Difference]: Finished difference Result 44525 states and 74855 transitions. [2022-11-19 07:12:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 141 [2022-11-19 07:12:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:13,337 INFO L225 Difference]: With dead ends: 44525 [2022-11-19 07:12:13,338 INFO L226 Difference]: Without dead ends: 23926 [2022-11-19 07:12:13,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:12:13,511 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 33 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:13,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1104 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23926 states. [2022-11-19 07:12:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23926 to 23250. [2022-11-19 07:12:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23250 states, 16537 states have (on average 1.4135574771724013) internal successors, (23376), 17606 states have internal predecessors, (23376), 4884 states have call successors, (4884), 1442 states have call predecessors, (4884), 1828 states have return successors, (9563), 4585 states have call predecessors, (9563), 4858 states have call successors, (9563) [2022-11-19 07:12:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23250 states to 23250 states and 37823 transitions. [2022-11-19 07:12:15,827 INFO L78 Accepts]: Start accepts. Automaton has 23250 states and 37823 transitions. Word has length 141 [2022-11-19 07:12:15,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:15,827 INFO L495 AbstractCegarLoop]: Abstraction has 23250 states and 37823 transitions. [2022-11-19 07:12:15,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 07:12:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 23250 states and 37823 transitions. [2022-11-19 07:12:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:12:15,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:15,853 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:12:15,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:16,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:12:16,062 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:16,063 INFO L85 PathProgramCache]: Analyzing trace with hash 275479384, now seen corresponding path program 1 times [2022-11-19 07:12:16,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:16,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706401622] [2022-11-19 07:12:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 07:12:16,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706401622] [2022-11-19 07:12:16,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706401622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879773681] [2022-11-19 07:12:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:16,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:16,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:16,783 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:16,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:12:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:17,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:12:17,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:12:17,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:17,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879773681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:17,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:17,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-11-19 07:12:17,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406970589] [2022-11-19 07:12:17,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:17,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:12:17,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:17,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:12:17,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:12:17,529 INFO L87 Difference]: Start difference. First operand 23250 states and 37823 transitions. Second operand has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-19 07:12:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:22,387 INFO L93 Difference]: Finished difference Result 58803 states and 97446 transitions. [2022-11-19 07:12:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:12:22,388 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 143 [2022-11-19 07:12:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:22,675 INFO L225 Difference]: With dead ends: 58803 [2022-11-19 07:12:22,675 INFO L226 Difference]: Without dead ends: 37765 [2022-11-19 07:12:22,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:12:22,837 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 581 mSDsluCounter, 3376 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 4062 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:22,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 4062 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:12:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37765 states. [2022-11-19 07:12:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37765 to 36013. [2022-11-19 07:12:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36013 states, 25636 states have (on average 1.4200343267280386) internal successors, (36404), 27341 states have internal predecessors, (36404), 7567 states have call successors, (7567), 2267 states have call predecessors, (7567), 2809 states have return successors, (15577), 7024 states have call predecessors, (15577), 7523 states have call successors, (15577) [2022-11-19 07:12:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36013 states to 36013 states and 59548 transitions. [2022-11-19 07:12:26,660 INFO L78 Accepts]: Start accepts. Automaton has 36013 states and 59548 transitions. Word has length 143 [2022-11-19 07:12:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:26,660 INFO L495 AbstractCegarLoop]: Abstraction has 36013 states and 59548 transitions. [2022-11-19 07:12:26,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-19 07:12:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 36013 states and 59548 transitions. [2022-11-19 07:12:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:12:26,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:26,673 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:26,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:26,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:12:26,884 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash -785305300, now seen corresponding path program 1 times [2022-11-19 07:12:26,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:26,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133397436] [2022-11-19 07:12:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:26,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-19 07:12:27,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:27,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133397436] [2022-11-19 07:12:27,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133397436] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:27,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404982871] [2022-11-19 07:12:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:27,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:27,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:27,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:27,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fbf086-b3bc-4d89-8e51-241ce9999bba/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:12:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:27,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 2377 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:12:28,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:12:28,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 07:12:28,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404982871] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:28,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:12:28,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 20 [2022-11-19 07:12:28,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881835335] [2022-11-19 07:12:28,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:28,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:12:28,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:12:28,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:12:28,443 INFO L87 Difference]: Start difference. First operand 36013 states and 59548 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25)