./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:14:49,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:14:49,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:14:49,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:14:49,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:14:49,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:14:49,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:14:49,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:14:49,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:14:49,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:14:49,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:14:49,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:14:49,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:14:49,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:14:49,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:14:49,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:14:49,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:14:49,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:14:49,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:14:49,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:14:49,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:14:49,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:14:49,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:14:49,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:14:49,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:14:49,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:14:49,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:14:49,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:14:49,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:14:49,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:14:49,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:14:49,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:14:49,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:14:49,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:14:49,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:14:49,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:14:49,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:14:49,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:14:49,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:14:49,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:14:49,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:14:49,095 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:14:49,117 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:14:49,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:14:49,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:14:49,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:14:49,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:14:49,119 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:14:49,119 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:14:49,120 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:14:49,120 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:14:49,120 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:14:49,121 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:14:49,121 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:14:49,121 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:14:49,122 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:14:49,122 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:14:49,122 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:14:49,122 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:14:49,123 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:14:49,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:14:49,124 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:14:49,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:14:49,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:14:49,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:14:49,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:14:49,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:14:49,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:14:49,126 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:14:49,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:14:49,126 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:14:49,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:14:49,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:14:49,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:14:49,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:14:49,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:14:49,128 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:14:49,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:14:49,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:14:49,128 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:14:49,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:14:49,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:14:49,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:14:49,129 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_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 [2022-11-03 02:14:49,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:14:49,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:14:49,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:14:49,397 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:14:49,399 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:14:49,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2022-11-03 02:14:49,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/data/b26c8805a/a180366caaf14c95b04efbf5177b25b5/FLAG2bdf66c6c [2022-11-03 02:14:50,169 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:14:50,178 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2022-11-03 02:14:50,202 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/data/b26c8805a/a180366caaf14c95b04efbf5177b25b5/FLAG2bdf66c6c [2022-11-03 02:14:50,375 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/data/b26c8805a/a180366caaf14c95b04efbf5177b25b5 [2022-11-03 02:14:50,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:14:50,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:14:50,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:14:50,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:14:50,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:14:50,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:14:50" (1/1) ... [2022-11-03 02:14:50,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5542bd81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:50, skipping insertion in model container [2022-11-03 02:14:50,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:14:50" (1/1) ... [2022-11-03 02:14:50,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:14:50,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:14:50,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2022-11-03 02:14:51,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:51,046 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:14:51,134 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2022-11-03 02:14:51,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:51,240 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:14:51,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51 WrapperNode [2022-11-03 02:14:51,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:14:51,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:14:51,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:14:51,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:14:51,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,364 INFO L138 Inliner]: procedures = 90, calls = 342, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 1043 [2022-11-03 02:14:51,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:14:51,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:14:51,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:14:51,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:14:51,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,443 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:14:51,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:14:51,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:14:51,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:14:51,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (1/1) ... [2022-11-03 02:14:51,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:14:51,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:51,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:14:51,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:14:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:14:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-03 02:14:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-03 02:14:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:14:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:14:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 02:14:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 02:14:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:14:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:14:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 02:14:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 02:14:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:14:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:14:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:14:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:14:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:14:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:14:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:14:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:14:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:14:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:14:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:14:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:14:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:14:51,567 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:14:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:14:51,567 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:14:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-03 02:14:51,567 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-03 02:14:51,568 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:14:51,568 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:14:51,568 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-03 02:14:51,568 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-03 02:14:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:14:51,569 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:14:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:14:51,569 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:14:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:14:51,569 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:14:51,570 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:14:51,570 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:14:51,570 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-03 02:14:51,570 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-03 02:14:51,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:14:51,571 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 02:14:51,571 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 02:14:51,572 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:14:51,573 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:14:51,573 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:14:51,573 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:14:51,573 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:14:51,574 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:14:51,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:14:51,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:14:51,575 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:14:51,575 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:14:51,718 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:14:51,721 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:14:53,025 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:14:53,728 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:14:53,728 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:14:53,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:14:53 BoogieIcfgContainer [2022-11-03 02:14:53,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:14:53,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:14:53,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:14:53,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:14:53,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:14:50" (1/3) ... [2022-11-03 02:14:53,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547773bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:14:53, skipping insertion in model container [2022-11-03 02:14:53,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:51" (2/3) ... [2022-11-03 02:14:53,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547773bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:14:53, skipping insertion in model container [2022-11-03 02:14:53,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:14:53" (3/3) ... [2022-11-03 02:14:53,743 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product03.cil.c [2022-11-03 02:14:53,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:14:53,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:14:53,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:14:53,870 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;@256524de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:14:53,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:14:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-11-03 02:14:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:14:53,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:53,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:53,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash -336537817, now seen corresponding path program 1 times [2022-11-03 02:14:53,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:53,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473253199] [2022-11-03 02:14:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:53,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:14:54,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:54,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473253199] [2022-11-03 02:14:54,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473253199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:14:54,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243812483] [2022-11-03 02:14:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:54,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:54,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:54,914 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:54,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:14:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:55,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:14:55,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:55,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243812483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:55,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:14:55,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:14:55,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400805872] [2022-11-03 02:14:55,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:55,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:55,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:55,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:55,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:14:55,576 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:14:55,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:55,925 INFO L93 Difference]: Finished difference Result 1135 states and 1815 transitions. [2022-11-03 02:14:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-03 02:14:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:55,961 INFO L225 Difference]: With dead ends: 1135 [2022-11-03 02:14:55,961 INFO L226 Difference]: Without dead ends: 733 [2022-11-03 02:14:55,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:14:55,974 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 506 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:55,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1286 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:14:55,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-11-03 02:14:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 721. [2022-11-03 02:14:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 487 states have (on average 1.566735112936345) internal successors, (763), 518 states have internal predecessors, (763), 187 states have call successors, (187), 47 states have call predecessors, (187), 46 states have return successors, (189), 181 states have call predecessors, (189), 184 states have call successors, (189) [2022-11-03 02:14:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1139 transitions. [2022-11-03 02:14:56,103 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1139 transitions. Word has length 87 [2022-11-03 02:14:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:56,104 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1139 transitions. [2022-11-03 02:14:56,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:14:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1139 transitions. [2022-11-03 02:14:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:56,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:56,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:56,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:56,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 02:14:56,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:56,332 INFO L85 PathProgramCache]: Analyzing trace with hash -903324750, now seen corresponding path program 1 times [2022-11-03 02:14:56,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:56,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777489483] [2022-11-03 02:14:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:56,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:14:56,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777489483] [2022-11-03 02:14:56,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777489483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:14:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321322395] [2022-11-03 02:14:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:56,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:56,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:56,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:56,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:14:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:14:57,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:14:57,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:57,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321322395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:57,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:14:57,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:14:57,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8951378] [2022-11-03 02:14:57,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:57,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:14:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:57,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:14:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:14:57,251 INFO L87 Difference]: Start difference. First operand 721 states and 1139 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 02:14:57,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:57,486 INFO L93 Difference]: Finished difference Result 1765 states and 2819 transitions. [2022-11-03 02:14:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:14:57,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-03 02:14:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:57,497 INFO L225 Difference]: With dead ends: 1765 [2022-11-03 02:14:57,498 INFO L226 Difference]: Without dead ends: 1056 [2022-11-03 02:14:57,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:14:57,504 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 561 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:57,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1175 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:14:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-11-03 02:14:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1032. [2022-11-03 02:14:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 701 states have (on average 1.5748930099857346) internal successors, (1104), 747 states have internal predecessors, (1104), 265 states have call successors, (265), 65 states have call predecessors, (265), 65 states have return successors, (272), 258 states have call predecessors, (272), 262 states have call successors, (272) [2022-11-03 02:14:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1641 transitions. [2022-11-03 02:14:57,631 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1641 transitions. Word has length 86 [2022-11-03 02:14:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:57,633 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1641 transitions. [2022-11-03 02:14:57,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 02:14:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1641 transitions. [2022-11-03 02:14:57,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:14:57,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:57,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:57,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:57,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:57,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:57,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:57,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1454362349, now seen corresponding path program 1 times [2022-11-03 02:14:57,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:57,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462643499] [2022-11-03 02:14:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:57,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:14:58,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:58,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462643499] [2022-11-03 02:14:58,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462643499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:58,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:58,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:14:58,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913968085] [2022-11-03 02:14:58,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:58,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:14:58,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:58,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:14:58,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:14:58,251 INFO L87 Difference]: Start difference. First operand 1032 states and 1641 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:14:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:59,365 INFO L93 Difference]: Finished difference Result 3493 states and 5724 transitions. [2022-11-03 02:14:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:14:59,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-03 02:14:59,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:59,387 INFO L225 Difference]: With dead ends: 3493 [2022-11-03 02:14:59,387 INFO L226 Difference]: Without dead ends: 2473 [2022-11-03 02:14:59,397 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 [2022-11-03 02:14:59,400 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 824 mSDsluCounter, 3377 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 4216 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:59,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 4216 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:14:59,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-11-03 02:14:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1930. [2022-11-03 02:14:59,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1337 states have (on average 1.5818997756170532) internal successors, (2115), 1425 states have internal predecessors, (2115), 473 states have call successors, (473), 118 states have call predecessors, (473), 119 states have return successors, (520), 446 states have call predecessors, (520), 469 states have call successors, (520) [2022-11-03 02:14:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3108 transitions. [2022-11-03 02:14:59,597 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3108 transitions. Word has length 87 [2022-11-03 02:14:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:59,597 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 3108 transitions. [2022-11-03 02:14:59,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:14:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3108 transitions. [2022-11-03 02:14:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:14:59,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:59,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:59,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:14:59,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:59,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1056566648, now seen corresponding path program 1 times [2022-11-03 02:14:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:59,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464668448] [2022-11-03 02:14:59,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:59,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:14:59,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:59,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464668448] [2022-11-03 02:14:59,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464668448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:14:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422260319] [2022-11-03 02:14:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:59,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:59,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:59,950 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:59,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:15:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:00,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:00,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:15:00,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:00,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422260319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:00,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:00,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:15:00,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830567443] [2022-11-03 02:15:00,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:00,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:00,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:00,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:00,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:00,439 INFO L87 Difference]: Start difference. First operand 1930 states and 3108 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:15:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:00,901 INFO L93 Difference]: Finished difference Result 5530 states and 9011 transitions. [2022-11-03 02:15:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-03 02:15:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:00,927 INFO L225 Difference]: With dead ends: 5530 [2022-11-03 02:15:00,927 INFO L226 Difference]: Without dead ends: 3613 [2022-11-03 02:15:00,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:00,944 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 493 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:00,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1232 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:15:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2022-11-03 02:15:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3585. [2022-11-03 02:15:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 2463 states have (on average 1.5306536743808363) internal successors, (3770), 2637 states have internal predecessors, (3770), 894 states have call successors, (894), 230 states have call predecessors, (894), 227 states have return successors, (1025), 831 states have call predecessors, (1025), 888 states have call successors, (1025) [2022-11-03 02:15:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 5689 transitions. [2022-11-03 02:15:01,215 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 5689 transitions. Word has length 88 [2022-11-03 02:15:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:01,217 INFO L495 AbstractCegarLoop]: Abstraction has 3585 states and 5689 transitions. [2022-11-03 02:15:01,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:15:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 5689 transitions. [2022-11-03 02:15:01,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 02:15:01,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:01,225 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] [2022-11-03 02:15:01,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 02:15:01,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:01,446 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash 766299694, now seen corresponding path program 1 times [2022-11-03 02:15:01,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:01,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144803662] [2022-11-03 02:15:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:01,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:15:01,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:01,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144803662] [2022-11-03 02:15:01,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144803662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379247166] [2022-11-03 02:15:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:01,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:01,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:01,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:15:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:02,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:15:02,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:15:02,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:02,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379247166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:02,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:02,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:15:02,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279420426] [2022-11-03 02:15:02,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:02,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:15:02,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:15:02,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:15:02,311 INFO L87 Difference]: Start difference. First operand 3585 states and 5689 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:15:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:03,545 INFO L93 Difference]: Finished difference Result 7326 states and 11781 transitions. [2022-11-03 02:15:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:15:03,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-03 02:15:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:03,573 INFO L225 Difference]: With dead ends: 7326 [2022-11-03 02:15:03,574 INFO L226 Difference]: Without dead ends: 3753 [2022-11-03 02:15:03,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:15:03,610 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 638 mSDsluCounter, 2706 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:03,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 3283 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:15:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2022-11-03 02:15:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 3735. [2022-11-03 02:15:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 2503 states have (on average 1.5101877746703956) internal successors, (3780), 2725 states have internal predecessors, (3780), 1014 states have call successors, (1014), 214 states have call predecessors, (1014), 217 states have return successors, (1204), 931 states have call predecessors, (1204), 1008 states have call successors, (1204) [2022-11-03 02:15:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 5998 transitions. [2022-11-03 02:15:03,881 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 5998 transitions. Word has length 89 [2022-11-03 02:15:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:03,881 INFO L495 AbstractCegarLoop]: Abstraction has 3735 states and 5998 transitions. [2022-11-03 02:15:03,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:15:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 5998 transitions. [2022-11-03 02:15:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:15:03,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:03,884 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] [2022-11-03 02:15:03,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:04,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:04,102 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1544903673, now seen corresponding path program 1 times [2022-11-03 02:15:04,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:04,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967108115] [2022-11-03 02:15:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:15:04,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:04,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967108115] [2022-11-03 02:15:04,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967108115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:04,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608441464] [2022-11-03 02:15:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:04,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:04,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:04,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:04,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:15:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:04,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:15:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:15:04,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:04,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608441464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:04,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:04,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:15:04,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076515591] [2022-11-03 02:15:04,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:04,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:04,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:04,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:04,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:04,812 INFO L87 Difference]: Start difference. First operand 3735 states and 5998 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:15:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:05,183 INFO L93 Difference]: Finished difference Result 8179 states and 13214 transitions. [2022-11-03 02:15:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:05,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-03 02:15:05,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:05,217 INFO L225 Difference]: With dead ends: 8179 [2022-11-03 02:15:05,218 INFO L226 Difference]: Without dead ends: 4456 [2022-11-03 02:15:05,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:05,302 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 559 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:05,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1274 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2022-11-03 02:15:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 3672. [2022-11-03 02:15:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 2460 states have (on average 1.5089430894308944) internal successors, (3712), 2681 states have internal predecessors, (3712), 1002 states have call successors, (1002), 210 states have call predecessors, (1002), 209 states have return successors, (1151), 916 states have call predecessors, (1151), 996 states have call successors, (1151) [2022-11-03 02:15:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 5865 transitions. [2022-11-03 02:15:05,558 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 5865 transitions. Word has length 88 [2022-11-03 02:15:05,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:05,559 INFO L495 AbstractCegarLoop]: Abstraction has 3672 states and 5865 transitions. [2022-11-03 02:15:05,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:15:05,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 5865 transitions. [2022-11-03 02:15:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:15:05,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:05,562 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:05,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:05,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:05,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:05,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:05,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1736239229, now seen corresponding path program 1 times [2022-11-03 02:15:05,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:05,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639481811] [2022-11-03 02:15:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:05,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:15:06,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:06,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639481811] [2022-11-03 02:15:06,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639481811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:06,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934800850] [2022-11-03 02:15:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:06,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:06,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:06,494 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:06,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:15:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:06,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:15:06,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:15:07,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:07,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934800850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:07,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:07,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-03 02:15:07,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37918312] [2022-11-03 02:15:07,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:07,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:07,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:07,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:07,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:15:07,119 INFO L87 Difference]: Start difference. First operand 3672 states and 5865 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:15:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:09,856 INFO L93 Difference]: Finished difference Result 9118 states and 14875 transitions. [2022-11-03 02:15:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:15:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2022-11-03 02:15:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:09,900 INFO L225 Difference]: With dead ends: 9118 [2022-11-03 02:15:09,900 INFO L226 Difference]: Without dead ends: 5458 [2022-11-03 02:15:09,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:15:09,925 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 1607 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:09,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1664 Valid, 2433 Invalid, 2542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:15:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2022-11-03 02:15:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 4012. [2022-11-03 02:15:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4012 states, 2716 states have (on average 1.4911634756995582) internal successors, (4050), 2945 states have internal predecessors, (4050), 1062 states have call successors, (1062), 238 states have call predecessors, (1062), 233 states have return successors, (1213), 964 states have call predecessors, (1213), 1056 states have call successors, (1213) [2022-11-03 02:15:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4012 states to 4012 states and 6325 transitions. [2022-11-03 02:15:10,341 INFO L78 Accepts]: Start accepts. Automaton has 4012 states and 6325 transitions. Word has length 94 [2022-11-03 02:15:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:10,343 INFO L495 AbstractCegarLoop]: Abstraction has 4012 states and 6325 transitions. [2022-11-03 02:15:10,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:15:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4012 states and 6325 transitions. [2022-11-03 02:15:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:15:10,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:10,348 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:10,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:10,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:10,571 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:10,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:10,571 INFO L85 PathProgramCache]: Analyzing trace with hash 734653633, now seen corresponding path program 1 times [2022-11-03 02:15:10,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:10,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554237087] [2022-11-03 02:15:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:10,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:15:11,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:11,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554237087] [2022-11-03 02:15:11,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554237087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:11,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432455637] [2022-11-03 02:15:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:11,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:11,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:11,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:11,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:15:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:11,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1618 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:15:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:15:11,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:11,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432455637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:11,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:11,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-03 02:15:11,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955234043] [2022-11-03 02:15:11,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:11,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:15:11,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:15:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:11,601 INFO L87 Difference]: Start difference. First operand 4012 states and 6325 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:15:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:12,203 INFO L93 Difference]: Finished difference Result 8369 states and 13490 transitions. [2022-11-03 02:15:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:15:12,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2022-11-03 02:15:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:12,249 INFO L225 Difference]: With dead ends: 8369 [2022-11-03 02:15:12,249 INFO L226 Difference]: Without dead ends: 5178 [2022-11-03 02:15:12,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:15:12,267 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 139 mSDsluCounter, 2629 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:12,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 3146 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:15:12,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5178 states. [2022-11-03 02:15:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5178 to 4236. [2022-11-03 02:15:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4236 states, 2868 states have (on average 1.4853556485355648) internal successors, (4260), 3118 states have internal predecessors, (4260), 1121 states have call successors, (1121), 238 states have call predecessors, (1121), 246 states have return successors, (1312), 1033 states have call predecessors, (1312), 1115 states have call successors, (1312) [2022-11-03 02:15:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4236 states to 4236 states and 6693 transitions. [2022-11-03 02:15:12,672 INFO L78 Accepts]: Start accepts. Automaton has 4236 states and 6693 transitions. Word has length 99 [2022-11-03 02:15:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:12,672 INFO L495 AbstractCegarLoop]: Abstraction has 4236 states and 6693 transitions. [2022-11-03 02:15:12,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:15:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4236 states and 6693 transitions. [2022-11-03 02:15:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 02:15:12,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:12,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:12,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:12,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:12,891 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:12,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash 247143736, now seen corresponding path program 1 times [2022-11-03 02:15:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:12,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11778296] [2022-11-03 02:15:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:15:13,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:13,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11778296] [2022-11-03 02:15:13,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11778296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:13,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022346496] [2022-11-03 02:15:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:13,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:13,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:13,502 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:13,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:15:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:13,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:15:13,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:15:14,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:15:14,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022346496] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:14,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:14,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-03 02:15:14,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242780138] [2022-11-03 02:15:14,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:14,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:15:14,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:14,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:15:14,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:15:14,566 INFO L87 Difference]: Start difference. First operand 4236 states and 6693 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:15:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:18,617 INFO L93 Difference]: Finished difference Result 11586 states and 19264 transitions. [2022-11-03 02:15:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:15:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2022-11-03 02:15:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:18,680 INFO L225 Difference]: With dead ends: 11586 [2022-11-03 02:15:18,680 INFO L226 Difference]: Without dead ends: 8537 [2022-11-03 02:15:18,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:15:18,706 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 1910 mSDsluCounter, 2756 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 3309 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:18,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1994 Valid, 3309 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 02:15:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8537 states. [2022-11-03 02:15:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8537 to 7336. [2022-11-03 02:15:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7336 states, 5182 states have (on average 1.489193361636434) internal successors, (7717), 5472 states have internal predecessors, (7717), 1647 states have call successors, (1647), 468 states have call predecessors, (1647), 506 states have return successors, (2376), 1539 states have call predecessors, (2376), 1639 states have call successors, (2376) [2022-11-03 02:15:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7336 states to 7336 states and 11740 transitions. [2022-11-03 02:15:19,395 INFO L78 Accepts]: Start accepts. Automaton has 7336 states and 11740 transitions. Word has length 103 [2022-11-03 02:15:19,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:19,395 INFO L495 AbstractCegarLoop]: Abstraction has 7336 states and 11740 transitions. [2022-11-03 02:15:19,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:15:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 7336 states and 11740 transitions. [2022-11-03 02:15:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:15:19,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:19,399 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:19,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:19,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:19,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1963665248, now seen corresponding path program 1 times [2022-11-03 02:15:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:19,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439008522] [2022-11-03 02:15:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:19,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:15:20,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:20,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439008522] [2022-11-03 02:15:20,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439008522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:20,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809299329] [2022-11-03 02:15:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:20,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:20,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:20,269 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:20,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:15:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:20,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:15:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:15:20,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:20,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809299329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:20,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:20,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-03 02:15:20,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466600797] [2022-11-03 02:15:20,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:20,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:20,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:15:20,795 INFO L87 Difference]: Start difference. First operand 7336 states and 11740 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-03 02:15:21,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:21,919 INFO L93 Difference]: Finished difference Result 13499 states and 21652 transitions. [2022-11-03 02:15:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:15:21,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2022-11-03 02:15:21,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:21,972 INFO L225 Difference]: With dead ends: 13499 [2022-11-03 02:15:21,972 INFO L226 Difference]: Without dead ends: 7358 [2022-11-03 02:15:22,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:15:22,009 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 417 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:22,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 2579 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:15:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7358 states. [2022-11-03 02:15:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7358 to 7336. [2022-11-03 02:15:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7336 states, 5182 states have (on average 1.489193361636434) internal successors, (7717), 5472 states have internal predecessors, (7717), 1647 states have call successors, (1647), 468 states have call predecessors, (1647), 506 states have return successors, (2368), 1539 states have call predecessors, (2368), 1639 states have call successors, (2368) [2022-11-03 02:15:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7336 states to 7336 states and 11732 transitions. [2022-11-03 02:15:22,708 INFO L78 Accepts]: Start accepts. Automaton has 7336 states and 11732 transitions. Word has length 107 [2022-11-03 02:15:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:22,708 INFO L495 AbstractCegarLoop]: Abstraction has 7336 states and 11732 transitions. [2022-11-03 02:15:22,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-03 02:15:22,709 INFO L276 IsEmpty]: Start isEmpty. Operand 7336 states and 11732 transitions. [2022-11-03 02:15:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:15:22,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:22,714 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:22,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:22,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:15:22,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:22,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:22,927 INFO L85 PathProgramCache]: Analyzing trace with hash 866008532, now seen corresponding path program 1 times [2022-11-03 02:15:22,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:22,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71365997] [2022-11-03 02:15:22,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:22,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:15:23,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:23,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71365997] [2022-11-03 02:15:23,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71365997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:23,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091208522] [2022-11-03 02:15:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:23,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:23,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:23,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:23,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:15:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:24,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:15:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:15:24,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:24,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091208522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:24,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:24,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-03 02:15:24,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909682368] [2022-11-03 02:15:24,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:24,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:15:24,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:15:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:15:24,251 INFO L87 Difference]: Start difference. First operand 7336 states and 11732 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2022-11-03 02:15:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:26,807 INFO L93 Difference]: Finished difference Result 24998 states and 42985 transitions. [2022-11-03 02:15:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:15:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 134 [2022-11-03 02:15:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:26,939 INFO L225 Difference]: With dead ends: 24998 [2022-11-03 02:15:26,940 INFO L226 Difference]: Without dead ends: 17674 [2022-11-03 02:15:26,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:15:26,993 INFO L413 NwaCegarLoop]: 982 mSDtfsCounter, 790 mSDsluCounter, 3423 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 4267 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:26,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 4267 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:15:27,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17674 states. [2022-11-03 02:15:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17674 to 14582. [2022-11-03 02:15:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14582 states, 10332 states have (on average 1.485191637630662) internal successors, (15345), 10924 states have internal predecessors, (15345), 3283 states have call successors, (3283), 887 states have call predecessors, (3283), 966 states have return successors, (5481), 3016 states have call predecessors, (5481), 3271 states have call successors, (5481) [2022-11-03 02:15:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14582 states to 14582 states and 24109 transitions. [2022-11-03 02:15:28,785 INFO L78 Accepts]: Start accepts. Automaton has 14582 states and 24109 transitions. Word has length 134 [2022-11-03 02:15:28,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:28,786 INFO L495 AbstractCegarLoop]: Abstraction has 14582 states and 24109 transitions. [2022-11-03 02:15:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2022-11-03 02:15:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 14582 states and 24109 transitions. [2022-11-03 02:15:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:15:28,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:28,792 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:28,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:29,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:15:29,013 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:29,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1883580168, now seen corresponding path program 1 times [2022-11-03 02:15:29,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:29,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817526725] [2022-11-03 02:15:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:29,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:15:29,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:29,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817526725] [2022-11-03 02:15:29,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817526725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:29,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:29,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-03 02:15:29,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130871403] [2022-11-03 02:15:29,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:29,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:15:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:29,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:15:29,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:29,952 INFO L87 Difference]: Start difference. First operand 14582 states and 24109 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-03 02:15:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:39,561 INFO L93 Difference]: Finished difference Result 55102 states and 95330 transitions. [2022-11-03 02:15:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:15:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2022-11-03 02:15:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:39,906 INFO L225 Difference]: With dead ends: 55102 [2022-11-03 02:15:39,906 INFO L226 Difference]: Without dead ends: 40532 [2022-11-03 02:15:40,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:15:40,028 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 3266 mSDsluCounter, 3988 mSDsCounter, 0 mSdLazyCounter, 7985 mSolverCounterSat, 1506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3369 SdHoareTripleChecker+Valid, 4453 SdHoareTripleChecker+Invalid, 9491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1506 IncrementalHoareTripleChecker+Valid, 7985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:40,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3369 Valid, 4453 Invalid, 9491 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1506 Valid, 7985 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 02:15:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40532 states. [2022-11-03 02:15:43,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40532 to 35037. [2022-11-03 02:15:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35037 states, 25848 states have (on average 1.489051377282575) internal successors, (38489), 26800 states have internal predecessors, (38489), 6460 states have call successors, (6460), 2463 states have call predecessors, (6460), 2728 states have return successors, (10627), 6199 states have call predecessors, (10627), 6440 states have call successors, (10627) [2022-11-03 02:15:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35037 states to 35037 states and 55576 transitions. [2022-11-03 02:15:43,538 INFO L78 Accepts]: Start accepts. Automaton has 35037 states and 55576 transitions. Word has length 140 [2022-11-03 02:15:43,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:43,539 INFO L495 AbstractCegarLoop]: Abstraction has 35037 states and 55576 transitions. [2022-11-03 02:15:43,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-03 02:15:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 35037 states and 55576 transitions. [2022-11-03 02:15:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-03 02:15:43,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:43,554 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:43,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:15:43,554 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash 77619140, now seen corresponding path program 1 times [2022-11-03 02:15:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:43,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145855500] [2022-11-03 02:15:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:43,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-03 02:15:43,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:43,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145855500] [2022-11-03 02:15:43,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145855500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:43,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:43,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:15:43,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335896810] [2022-11-03 02:15:43,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:43,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:43,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:15:43,687 INFO L87 Difference]: Start difference. First operand 35037 states and 55576 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 02:15:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:48,229 INFO L93 Difference]: Finished difference Result 81862 states and 131642 transitions. [2022-11-03 02:15:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 172 [2022-11-03 02:15:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:48,715 INFO L225 Difference]: With dead ends: 81862 [2022-11-03 02:15:48,715 INFO L226 Difference]: Without dead ends: 46837 [2022-11-03 02:15:48,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:15:48,876 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 520 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:48,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1380 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:48,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46837 states. [2022-11-03 02:15:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46837 to 46468. [2022-11-03 02:15:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 34331 states have (on average 1.489149748041129) internal successors, (51124), 35609 states have internal predecessors, (51124), 8512 states have call successors, (8512), 3253 states have call predecessors, (8512), 3624 states have return successors, (14110), 8175 states have call predecessors, (14110), 8492 states have call successors, (14110) [2022-11-03 02:15:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 73746 transitions. [2022-11-03 02:15:53,501 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 73746 transitions. Word has length 172 [2022-11-03 02:15:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:53,502 INFO L495 AbstractCegarLoop]: Abstraction has 46468 states and 73746 transitions. [2022-11-03 02:15:53,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 02:15:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 73746 transitions. [2022-11-03 02:15:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-03 02:15:53,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:53,515 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:53,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:15:53,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1220432249, now seen corresponding path program 1 times [2022-11-03 02:15:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:53,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208111497] [2022-11-03 02:15:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-03 02:15:53,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:53,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208111497] [2022-11-03 02:15:53,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208111497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:53,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207307139] [2022-11-03 02:15:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:53,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:53,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:53,915 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:53,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329d387-c1f0-4f56-a239-61796fd45a54/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:15:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:54,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:15:54,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:15:54,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 02:15:55,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207307139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808049492] [2022-11-03 02:15:55,162 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-11-03 02:15:55,163 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:15:55,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:15:55,172 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:15:55,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:16:03,838 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2022-11-03 02:16:12,820 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-11-03 02:16:12,823 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-03 02:16:13,113 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 33 for LOIs [2022-11-03 02:16:13,142 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 597 for LOIs [2022-11-03 02:16:15,420 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 571 for LOIs [2022-11-03 02:16:15,605 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 33 for LOIs [2022-11-03 02:16:15,607 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 33 for LOIs [2022-11-03 02:16:15,729 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 57 for LOIs [2022-11-03 02:16:15,753 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 50 for LOIs [2022-11-03 02:16:15,772 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 43 for LOIs [2022-11-03 02:16:15,788 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 54 for LOIs [2022-11-03 02:16:15,797 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 571 for LOIs [2022-11-03 02:16:19,178 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 575 for LOIs [2022-11-03 02:16:19,888 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 503 for LOIs [2022-11-03 02:16:20,061 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:16:52,017 WARN L234 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 643 DAG size of output: 590 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:59,176 WARN L234 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 643 DAG size of output: 590 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:17:07,705 WARN L234 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 770 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:17:21,133 WARN L234 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 677 DAG size of output: 572 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:17:28,542 WARN L234 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 661 DAG size of output: 565 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:17:58,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '527927#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-11-03 02:17:58,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:17:58,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:17:58,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-11-03 02:17:58,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752035461] [2022-11-03 02:17:58,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:58,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:17:58,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:58,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:17:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=9739, Unknown=0, NotChecked=0, Total=10302 [2022-11-03 02:17:58,553 INFO L87 Difference]: Start difference. First operand 46468 states and 73746 transitions. Second operand has 16 states, 13 states have (on average 9.692307692307692) internal successors, (126), 12 states have internal predecessors, (126), 6 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (47), 10 states have call predecessors, (47), 6 states have call successors, (47) [2022-11-03 02:18:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:16,670 INFO L93 Difference]: Finished difference Result 164865 states and 277843 transitions. [2022-11-03 02:18:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 02:18:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 9.692307692307692) internal successors, (126), 12 states have internal predecessors, (126), 6 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (47), 10 states have call predecessors, (47), 6 states have call successors, (47) Word has length 177 [2022-11-03 02:18:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:18,134 INFO L225 Difference]: With dead ends: 164865 [2022-11-03 02:18:18,134 INFO L226 Difference]: Without dead ends: 121587 [2022-11-03 02:18:18,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 439 SyntacticMatches, 16 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8820 ImplicationChecksByTransitivity, 100.5s TimeCoverageRelationStatistics Valid=1094, Invalid=21556, Unknown=0, NotChecked=0, Total=22650 [2022-11-03 02:18:18,505 INFO L413 NwaCegarLoop]: 1351 mSDtfsCounter, 3183 mSDsluCounter, 10489 mSDsCounter, 0 mSdLazyCounter, 8625 mSolverCounterSat, 1981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3246 SdHoareTripleChecker+Valid, 11171 SdHoareTripleChecker+Invalid, 10606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1981 IncrementalHoareTripleChecker+Valid, 8625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:18,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3246 Valid, 11171 Invalid, 10606 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1981 Valid, 8625 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-03 02:18:18,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121587 states.