./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/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_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/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_d46e2cec-66b1-442f-b879-b0e262104c9e/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 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af --- 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 04:07:05,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:07:05,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:07:05,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:07:05,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:07:05,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:07:05,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:07:05,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:07:05,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:07:05,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:07:05,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:07:05,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:07:05,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:07:05,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:07:05,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:07:05,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:07:05,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:07:05,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:07:05,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:07:05,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:07:05,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:07:05,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:07:05,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:07:05,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:07:05,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:07:05,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:07:05,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:07:05,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:07:05,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:07:05,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:07:05,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:07:05,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:07:05,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:07:05,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:07:05,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:07:05,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:07:05,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:07:05,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:07:05,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:07:05,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:07:05,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:07:05,888 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:07:05,938 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:07:05,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:07:05,939 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:07:05,939 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:07:05,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:07:05,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:07:05,941 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:07:05,941 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:07:05,942 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:07:05,942 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:07:05,943 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:07:05,943 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:07:05,944 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:07:05,944 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:07:05,944 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:07:05,945 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:07:05,945 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:07:05,945 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:07:05,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:07:05,946 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:07:05,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:07:05,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:07:05,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:07:05,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:07:05,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:07:05,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:07:05,950 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:07:05,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:07:05,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:07:05,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:07:05,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:07:05,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:07:05,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:07:05,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:07:05,952 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:07:05,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:07:05,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:07:05,953 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:07:05,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:07:05,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:07:05,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:07:05,954 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_d46e2cec-66b1-442f-b879-b0e262104c9e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af [2022-11-03 04:07:06,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:07:06,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:07:06,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:07:06,294 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:07:06,295 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:07:06,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2022-11-03 04:07:06,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/data/4777e7a38/d18a3122053b43ce8c177db5f24f00de/FLAG0575fa3b1 [2022-11-03 04:07:07,064 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:07:07,065 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2022-11-03 04:07:07,092 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/data/4777e7a38/d18a3122053b43ce8c177db5f24f00de/FLAG0575fa3b1 [2022-11-03 04:07:07,304 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/data/4777e7a38/d18a3122053b43ce8c177db5f24f00de [2022-11-03 04:07:07,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:07:07,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:07:07,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:07:07,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:07:07,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:07:07,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:07,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2131b483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07, skipping insertion in model container [2022-11-03 04:07:07,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:07,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:07:07,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:07:07,669 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_d46e2cec-66b1-442f-b879-b0e262104c9e/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2022-11-03 04:07:07,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:07:08,019 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:07:08,032 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2022-11-03 04:07:08,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:07:08,223 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:07:08,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08 WrapperNode [2022-11-03 04:07:08,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:07:08,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:07:08,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:07:08,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:07:08,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,325 INFO L138 Inliner]: procedures = 88, calls = 328, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 754 [2022-11-03 04:07:08,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:07:08,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:07:08,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:07:08,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:07:08,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,415 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:07:08,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:07:08,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:07:08,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:07:08,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (1/1) ... [2022-11-03 04:07:08,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:07:08,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:08,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:07:08,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:07:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:07:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 04:07:08,526 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 04:07:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 04:07:08,526 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 04:07:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 04:07:08,527 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 04:07:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 04:07:08,527 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 04:07:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 04:07:08,527 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 04:07:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 04:07:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 04:07:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 04:07:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 04:07:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 04:07:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 04:07:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 04:07:08,529 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 04:07:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 04:07:08,529 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 04:07:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 04:07:08,529 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 04:07:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 04:07:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 04:07:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 04:07:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 04:07:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 04:07:08,531 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 04:07:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 04:07:08,531 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 04:07:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 04:07:08,531 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 04:07:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:07:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 04:07:08,532 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 04:07:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 04:07:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 04:07:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 04:07:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 04:07:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:07:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:07:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 04:07:08,534 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 04:07:08,694 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:07:08,697 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:07:09,952 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:07:10,812 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:07:10,812 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:07:10,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:10 BoogieIcfgContainer [2022-11-03 04:07:10,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:07:10,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:07:10,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:07:10,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:07:10,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:07:07" (1/3) ... [2022-11-03 04:07:10,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d91cf4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:10, skipping insertion in model container [2022-11-03 04:07:10,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:08" (2/3) ... [2022-11-03 04:07:10,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d91cf4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:10, skipping insertion in model container [2022-11-03 04:07:10,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:10" (3/3) ... [2022-11-03 04:07:10,830 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product01.cil.c [2022-11-03 04:07:10,854 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:07:10,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:07:10,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:07:10,973 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;@401e3460, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:07:10,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:07:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 341 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 254 states have internal predecessors, (380), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-03 04:07:11,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 04:07:11,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:11,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:11,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:11,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1848298950, now seen corresponding path program 1 times [2022-11-03 04:07:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:11,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146475958] [2022-11-03 04:07:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:11,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:11,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:11,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146475958] [2022-11-03 04:07:11,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146475958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:11,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:11,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:07:11,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663808304] [2022-11-03 04:07:11,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:11,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 04:07:11,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:11,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 04:07:11,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 04:07:11,653 INFO L87 Difference]: Start difference. First operand has 341 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 254 states have internal predecessors, (380), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 04:07:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:11,801 INFO L93 Difference]: Finished difference Result 359 states and 579 transitions. [2022-11-03 04:07:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 04:07:11,803 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 51 [2022-11-03 04:07:11,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:11,819 INFO L225 Difference]: With dead ends: 359 [2022-11-03 04:07:11,819 INFO L226 Difference]: Without dead ends: 337 [2022-11-03 04:07:11,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 04:07:11,826 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:11,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 513 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-03 04:07:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2022-11-03 04:07:11,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 231 states have (on average 1.619047619047619) internal successors, (374), 250 states have internal predecessors, (374), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-03 04:07:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 541 transitions. [2022-11-03 04:07:11,897 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 541 transitions. Word has length 51 [2022-11-03 04:07:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:11,899 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 541 transitions. [2022-11-03 04:07:11,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 04:07:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 541 transitions. [2022-11-03 04:07:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 04:07:11,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:11,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:11,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:07:11,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:11,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:11,906 INFO L85 PathProgramCache]: Analyzing trace with hash -876686664, now seen corresponding path program 1 times [2022-11-03 04:07:11,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:11,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429009117] [2022-11-03 04:07:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:11,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:12,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:12,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429009117] [2022-11-03 04:07:12,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429009117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:12,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:12,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:07:12,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169924693] [2022-11-03 04:07:12,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:12,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:07:12,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:12,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:07:12,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:07:12,479 INFO L87 Difference]: Start difference. First operand 337 states and 541 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:07:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:15,592 INFO L93 Difference]: Finished difference Result 1142 states and 1868 transitions. [2022-11-03 04:07:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 04:07:15,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-11-03 04:07:15,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:15,600 INFO L225 Difference]: With dead ends: 1142 [2022-11-03 04:07:15,600 INFO L226 Difference]: Without dead ends: 821 [2022-11-03 04:07:15,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:07:15,605 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 1612 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1673 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:15,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1673 Valid, 2011 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 04:07:15,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-03 04:07:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 772. [2022-11-03 04:07:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 549 states have (on average 1.6466302367941712) internal successors, (904), 584 states have internal predecessors, (904), 181 states have call successors, (181), 39 states have call predecessors, (181), 41 states have return successors, (182), 173 states have call predecessors, (182), 176 states have call successors, (182) [2022-11-03 04:07:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1267 transitions. [2022-11-03 04:07:15,705 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1267 transitions. Word has length 52 [2022-11-03 04:07:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:15,705 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1267 transitions. [2022-11-03 04:07:15,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:07:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1267 transitions. [2022-11-03 04:07:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 04:07:15,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:15,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:15,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:07:15,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:15,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1471466124, now seen corresponding path program 1 times [2022-11-03 04:07:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:15,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079338479] [2022-11-03 04:07:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:15,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:16,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:16,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079338479] [2022-11-03 04:07:16,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079338479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:16,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:16,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:07:16,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120757360] [2022-11-03 04:07:16,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:16,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:16,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:16,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:16,064 INFO L87 Difference]: Start difference. First operand 772 states and 1267 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 04:07:16,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:16,359 INFO L93 Difference]: Finished difference Result 1302 states and 2142 transitions. [2022-11-03 04:07:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:16,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-11-03 04:07:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:16,368 INFO L225 Difference]: With dead ends: 1302 [2022-11-03 04:07:16,369 INFO L226 Difference]: Without dead ends: 842 [2022-11-03 04:07:16,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:16,374 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 41 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:16,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2141 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:07:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-03 04:07:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 784. [2022-11-03 04:07:16,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 558 states have (on average 1.636200716845878) internal successors, (913), 593 states have internal predecessors, (913), 181 states have call successors, (181), 39 states have call predecessors, (181), 44 states have return successors, (188), 176 states have call predecessors, (188), 176 states have call successors, (188) [2022-11-03 04:07:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1282 transitions. [2022-11-03 04:07:16,474 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1282 transitions. Word has length 56 [2022-11-03 04:07:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:16,475 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1282 transitions. [2022-11-03 04:07:16,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 04:07:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1282 transitions. [2022-11-03 04:07:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 04:07:16,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:16,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:16,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:07:16,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -388017316, now seen corresponding path program 1 times [2022-11-03 04:07:16,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:16,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871511765] [2022-11-03 04:07:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:16,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:16,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871511765] [2022-11-03 04:07:16,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871511765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:16,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:16,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:16,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851210353] [2022-11-03 04:07:16,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:16,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:16,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:16,886 INFO L87 Difference]: Start difference. First operand 784 states and 1282 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 04:07:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:19,435 INFO L93 Difference]: Finished difference Result 1791 states and 2921 transitions. [2022-11-03 04:07:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:07:19,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2022-11-03 04:07:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:19,445 INFO L225 Difference]: With dead ends: 1791 [2022-11-03 04:07:19,445 INFO L226 Difference]: Without dead ends: 1223 [2022-11-03 04:07:19,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:07:19,457 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 3023 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 1335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3166 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1335 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:19,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3166 Valid, 1421 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1335 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 04:07:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-11-03 04:07:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1129. [2022-11-03 04:07:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 791 states have (on average 1.5903919089759797) internal successors, (1258), 843 states have internal predecessors, (1258), 267 states have call successors, (267), 62 states have call predecessors, (267), 70 states have return successors, (283), 260 states have call predecessors, (283), 262 states have call successors, (283) [2022-11-03 04:07:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1808 transitions. [2022-11-03 04:07:19,575 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1808 transitions. Word has length 60 [2022-11-03 04:07:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:19,576 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1808 transitions. [2022-11-03 04:07:19,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 04:07:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1808 transitions. [2022-11-03 04:07:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 04:07:19,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:19,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:19,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:07:19,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:19,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1496835458, now seen corresponding path program 1 times [2022-11-03 04:07:19,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:19,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680693847] [2022-11-03 04:07:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:19,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:19,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:19,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680693847] [2022-11-03 04:07:19,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680693847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:19,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:19,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:07:19,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377071809] [2022-11-03 04:07:19,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:19,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:19,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:19,885 INFO L87 Difference]: Start difference. First operand 1129 states and 1808 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 04:07:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:20,243 INFO L93 Difference]: Finished difference Result 2186 states and 3555 transitions. [2022-11-03 04:07:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 63 [2022-11-03 04:07:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:20,254 INFO L225 Difference]: With dead ends: 2186 [2022-11-03 04:07:20,254 INFO L226 Difference]: Without dead ends: 1129 [2022-11-03 04:07:20,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:07:20,261 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 221 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:20,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1904 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:07:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-11-03 04:07:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1129. [2022-11-03 04:07:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 791 states have (on average 1.5499367888748419) internal successors, (1226), 843 states have internal predecessors, (1226), 267 states have call successors, (267), 62 states have call predecessors, (267), 70 states have return successors, (283), 260 states have call predecessors, (283), 262 states have call successors, (283) [2022-11-03 04:07:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1776 transitions. [2022-11-03 04:07:20,363 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1776 transitions. Word has length 63 [2022-11-03 04:07:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:20,364 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1776 transitions. [2022-11-03 04:07:20,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 04:07:20,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1776 transitions. [2022-11-03 04:07:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 04:07:20,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:20,366 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:20,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 04:07:20,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:20,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1683219067, now seen corresponding path program 1 times [2022-11-03 04:07:20,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:20,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603475936] [2022-11-03 04:07:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:20,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:07:20,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:20,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603475936] [2022-11-03 04:07:20,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603475936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:20,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:20,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:07:20,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566203347] [2022-11-03 04:07:20,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:20,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:07:20,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:20,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:07:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:07:20,711 INFO L87 Difference]: Start difference. First operand 1129 states and 1776 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:07:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:22,819 INFO L93 Difference]: Finished difference Result 2173 states and 3433 transitions. [2022-11-03 04:07:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:07:22,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2022-11-03 04:07:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:22,832 INFO L225 Difference]: With dead ends: 2173 [2022-11-03 04:07:22,832 INFO L226 Difference]: Without dead ends: 1317 [2022-11-03 04:07:22,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:07:22,838 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 893 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:22,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 1722 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:07:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-11-03 04:07:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1156. [2022-11-03 04:07:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 809 states have (on average 1.542645241038319) internal successors, (1248), 865 states have internal predecessors, (1248), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-11-03 04:07:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1810 transitions. [2022-11-03 04:07:22,974 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1810 transitions. Word has length 65 [2022-11-03 04:07:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:22,974 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 1810 transitions. [2022-11-03 04:07:22,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:07:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1810 transitions. [2022-11-03 04:07:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 04:07:22,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:22,977 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 04:07:22,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 04:07:22,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:22,977 INFO L85 PathProgramCache]: Analyzing trace with hash 995417882, now seen corresponding path program 1 times [2022-11-03 04:07:22,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:22,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620028701] [2022-11-03 04:07:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:22,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:07:23,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:23,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620028701] [2022-11-03 04:07:23,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620028701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:23,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:23,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:07:23,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973928632] [2022-11-03 04:07:23,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:23,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:23,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:07:23,220 INFO L87 Difference]: Start difference. First operand 1156 states and 1810 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 04:07:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:23,999 INFO L93 Difference]: Finished difference Result 1228 states and 1923 transitions. [2022-11-03 04:07:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:24,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2022-11-03 04:07:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:24,018 INFO L225 Difference]: With dead ends: 1228 [2022-11-03 04:07:24,018 INFO L226 Difference]: Without dead ends: 1213 [2022-11-03 04:07:24,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:24,022 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 624 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:24,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 1656 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:07:24,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-11-03 04:07:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1160. [2022-11-03 04:07:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 813 states have (on average 1.5399753997539976) internal successors, (1252), 869 states have internal predecessors, (1252), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-11-03 04:07:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1814 transitions. [2022-11-03 04:07:24,188 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1814 transitions. Word has length 72 [2022-11-03 04:07:24,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:24,189 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1814 transitions. [2022-11-03 04:07:24,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 04:07:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1814 transitions. [2022-11-03 04:07:24,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 04:07:24,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:24,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:24,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 04:07:24,194 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1885246372, now seen corresponding path program 1 times [2022-11-03 04:07:24,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:24,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612406054] [2022-11-03 04:07:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:24,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:07:24,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:24,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612406054] [2022-11-03 04:07:24,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612406054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:24,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:24,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:07:24,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479627559] [2022-11-03 04:07:24,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:24,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:24,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:24,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:07:24,488 INFO L87 Difference]: Start difference. First operand 1160 states and 1814 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 04:07:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:24,673 INFO L93 Difference]: Finished difference Result 1179 states and 1838 transitions. [2022-11-03 04:07:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:07:24,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 74 [2022-11-03 04:07:24,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:24,686 INFO L225 Difference]: With dead ends: 1179 [2022-11-03 04:07:24,686 INFO L226 Difference]: Without dead ends: 1164 [2022-11-03 04:07:24,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:07:24,690 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 41 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2460 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:24,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2460 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-11-03 04:07:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1160. [2022-11-03 04:07:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 813 states have (on average 1.5362853628536286) internal successors, (1249), 869 states have internal predecessors, (1249), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-11-03 04:07:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1811 transitions. [2022-11-03 04:07:24,824 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1811 transitions. Word has length 74 [2022-11-03 04:07:24,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:24,824 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1811 transitions. [2022-11-03 04:07:24,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 04:07:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1811 transitions. [2022-11-03 04:07:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:07:24,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:24,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:24,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 04:07:24,833 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1615727290, now seen corresponding path program 1 times [2022-11-03 04:07:24,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:24,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100491657] [2022-11-03 04:07:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:24,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:07:25,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:25,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100491657] [2022-11-03 04:07:25,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100491657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:25,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:25,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410475549] [2022-11-03 04:07:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:25,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:25,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:25,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:25,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:25,058 INFO L87 Difference]: Start difference. First operand 1160 states and 1811 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 04:07:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:26,554 INFO L93 Difference]: Finished difference Result 3735 states and 5935 transitions. [2022-11-03 04:07:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:26,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2022-11-03 04:07:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:26,575 INFO L225 Difference]: With dead ends: 3735 [2022-11-03 04:07:26,576 INFO L226 Difference]: Without dead ends: 2591 [2022-11-03 04:07:26,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:26,585 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 1048 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:26,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1110 Valid, 886 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 04:07:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-11-03 04:07:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2344. [2022-11-03 04:07:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1673 states have (on average 1.5457262402869096) internal successors, (2586), 1784 states have internal predecessors, (2586), 517 states have call successors, (517), 123 states have call predecessors, (517), 153 states have return successors, (594), 489 states have call predecessors, (594), 512 states have call successors, (594) [2022-11-03 04:07:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3697 transitions. [2022-11-03 04:07:26,811 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3697 transitions. Word has length 84 [2022-11-03 04:07:26,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:26,812 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 3697 transitions. [2022-11-03 04:07:26,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 04:07:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3697 transitions. [2022-11-03 04:07:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 04:07:26,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:26,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:26,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:07:26,816 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:26,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1451644966, now seen corresponding path program 1 times [2022-11-03 04:07:26,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:26,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596825790] [2022-11-03 04:07:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:26,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:07:27,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:27,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596825790] [2022-11-03 04:07:27,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596825790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:27,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:27,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:27,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758170217] [2022-11-03 04:07:27,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:27,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:27,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:27,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:27,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:27,174 INFO L87 Difference]: Start difference. First operand 2344 states and 3697 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 04:07:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:28,830 INFO L93 Difference]: Finished difference Result 7195 states and 11541 transitions. [2022-11-03 04:07:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:28,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2022-11-03 04:07:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:28,870 INFO L225 Difference]: With dead ends: 7195 [2022-11-03 04:07:28,870 INFO L226 Difference]: Without dead ends: 4870 [2022-11-03 04:07:28,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:28,884 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 1035 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:28,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 894 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 04:07:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-11-03 04:07:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 4554. [2022-11-03 04:07:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 3280 states have (on average 1.5484756097560977) internal successors, (5079), 3513 states have internal predecessors, (5079), 964 states have call successors, (964), 235 states have call predecessors, (964), 309 states have return successors, (1190), 896 states have call predecessors, (1190), 959 states have call successors, (1190) [2022-11-03 04:07:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 7233 transitions. [2022-11-03 04:07:29,441 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 7233 transitions. Word has length 85 [2022-11-03 04:07:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:29,441 INFO L495 AbstractCegarLoop]: Abstraction has 4554 states and 7233 transitions. [2022-11-03 04:07:29,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 04:07:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 7233 transitions. [2022-11-03 04:07:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 04:07:29,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:29,445 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:29,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 04:07:29,446 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:29,446 INFO L85 PathProgramCache]: Analyzing trace with hash -32023065, now seen corresponding path program 1 times [2022-11-03 04:07:29,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:29,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126649948] [2022-11-03 04:07:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:29,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:07:29,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:29,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126649948] [2022-11-03 04:07:29,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126649948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:29,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:29,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:29,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101325242] [2022-11-03 04:07:29,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:29,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:29,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:29,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:29,688 INFO L87 Difference]: Start difference. First operand 4554 states and 7233 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:07:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:31,894 INFO L93 Difference]: Finished difference Result 13885 states and 22609 transitions. [2022-11-03 04:07:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 83 [2022-11-03 04:07:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:31,990 INFO L225 Difference]: With dead ends: 13885 [2022-11-03 04:07:31,991 INFO L226 Difference]: Without dead ends: 9356 [2022-11-03 04:07:32,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:32,025 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 1028 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:32,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 903 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 04:07:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9356 states. [2022-11-03 04:07:33,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9356 to 8888. [2022-11-03 04:07:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8888 states, 6423 states have (on average 1.5453837770512222) internal successors, (9926), 6912 states have internal predecessors, (9926), 1831 states have call successors, (1831), 459 states have call predecessors, (1831), 633 states have return successors, (2517), 1683 states have call predecessors, (2517), 1826 states have call successors, (2517) [2022-11-03 04:07:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8888 states to 8888 states and 14274 transitions. [2022-11-03 04:07:33,119 INFO L78 Accepts]: Start accepts. Automaton has 8888 states and 14274 transitions. Word has length 83 [2022-11-03 04:07:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:33,119 INFO L495 AbstractCegarLoop]: Abstraction has 8888 states and 14274 transitions. [2022-11-03 04:07:33,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:07:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 8888 states and 14274 transitions. [2022-11-03 04:07:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 04:07:33,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:33,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:33,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 04:07:33,125 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash -846761048, now seen corresponding path program 1 times [2022-11-03 04:07:33,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:33,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289203263] [2022-11-03 04:07:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:33,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:07:33,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:33,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289203263] [2022-11-03 04:07:33,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289203263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:33,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:33,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438583894] [2022-11-03 04:07:33,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:33,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:33,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:33,337 INFO L87 Difference]: Start difference. First operand 8888 states and 14274 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 04:07:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:36,397 INFO L93 Difference]: Finished difference Result 27035 states and 45273 transitions. [2022-11-03 04:07:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2022-11-03 04:07:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:36,532 INFO L225 Difference]: With dead ends: 27035 [2022-11-03 04:07:36,533 INFO L226 Difference]: Without dead ends: 18184 [2022-11-03 04:07:36,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:36,587 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 1009 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:36,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1068 Valid, 915 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 04:07:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18184 states. [2022-11-03 04:07:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18184 to 17398. [2022-11-03 04:07:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17398 states, 12578 states have (on average 1.539274924471299) internal successors, (19361), 13603 states have internal predecessors, (19361), 3514 states have call successors, (3514), 907 states have call predecessors, (3514), 1305 states have return successors, (5684), 3206 states have call predecessors, (5684), 3509 states have call successors, (5684) [2022-11-03 04:07:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17398 states to 17398 states and 28559 transitions. [2022-11-03 04:07:38,986 INFO L78 Accepts]: Start accepts. Automaton has 17398 states and 28559 transitions. Word has length 87 [2022-11-03 04:07:38,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:38,987 INFO L495 AbstractCegarLoop]: Abstraction has 17398 states and 28559 transitions. [2022-11-03 04:07:38,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 04:07:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 17398 states and 28559 transitions. [2022-11-03 04:07:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 04:07:38,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:38,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:38,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 04:07:38,993 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash -480193590, now seen corresponding path program 1 times [2022-11-03 04:07:38,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:38,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889520796] [2022-11-03 04:07:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:38,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:07:39,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:39,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889520796] [2022-11-03 04:07:39,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889520796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:39,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:39,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988969336] [2022-11-03 04:07:39,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:39,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:39,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:39,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:39,262 INFO L87 Difference]: Start difference. First operand 17398 states and 28559 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 04:07:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:43,290 INFO L93 Difference]: Finished difference Result 53027 states and 93549 transitions. [2022-11-03 04:07:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:43,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 88 [2022-11-03 04:07:43,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:43,622 INFO L225 Difference]: With dead ends: 53027 [2022-11-03 04:07:43,622 INFO L226 Difference]: Without dead ends: 35680 [2022-11-03 04:07:43,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:43,739 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 1000 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:43,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 930 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 04:07:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35680 states. [2022-11-03 04:07:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35680 to 34044. [2022-11-03 04:07:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34044 states, 24665 states have (on average 1.5361037907966755) internal successors, (37888), 26717 states have internal predecessors, (37888), 6778 states have call successors, (6778), 1800 states have call predecessors, (6778), 2600 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-11-03 04:07:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34044 states to 34044 states and 57973 transitions. [2022-11-03 04:07:48,165 INFO L78 Accepts]: Start accepts. Automaton has 34044 states and 57973 transitions. Word has length 88 [2022-11-03 04:07:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:48,166 INFO L495 AbstractCegarLoop]: Abstraction has 34044 states and 57973 transitions. [2022-11-03 04:07:48,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 04:07:48,166 INFO L276 IsEmpty]: Start isEmpty. Operand 34044 states and 57973 transitions. [2022-11-03 04:07:48,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 04:07:48,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:48,174 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:48,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 04:07:48,174 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:48,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1620663809, now seen corresponding path program 1 times [2022-11-03 04:07:48,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:48,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492024112] [2022-11-03 04:07:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:48,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 04:07:48,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:48,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492024112] [2022-11-03 04:07:48,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492024112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:48,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642939986] [2022-11-03 04:07:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:48,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:48,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:48,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:48,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:07:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:49,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:07:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:07:49,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:49,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642939986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:49,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:49,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-03 04:07:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410305789] [2022-11-03 04:07:49,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:49,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:49,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:49,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:49,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:07:49,168 INFO L87 Difference]: Start difference. First operand 34044 states and 57973 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:07:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:52,850 INFO L93 Difference]: Finished difference Result 71815 states and 127334 transitions. [2022-11-03 04:07:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:52,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 127 [2022-11-03 04:07:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:53,046 INFO L225 Difference]: With dead ends: 71815 [2022-11-03 04:07:53,046 INFO L226 Difference]: Without dead ends: 37788 [2022-11-03 04:07:53,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:53,186 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 213 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:53,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1275 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:07:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37788 states. [2022-11-03 04:07:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37788 to 37788. [2022-11-03 04:07:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37788 states, 28313 states have (on average 1.5857026807473598) internal successors, (44896), 30365 states have internal predecessors, (44896), 6778 states have call successors, (6778), 1896 states have call predecessors, (6778), 2696 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-11-03 04:07:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37788 states to 37788 states and 64981 transitions. [2022-11-03 04:07:56,899 INFO L78 Accepts]: Start accepts. Automaton has 37788 states and 64981 transitions. Word has length 127 [2022-11-03 04:07:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:56,899 INFO L495 AbstractCegarLoop]: Abstraction has 37788 states and 64981 transitions. [2022-11-03 04:07:56,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:07:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 37788 states and 64981 transitions. [2022-11-03 04:07:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 04:07:56,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:56,913 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:56,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:57,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 04:07:57,126 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:57,127 INFO L85 PathProgramCache]: Analyzing trace with hash -990856164, now seen corresponding path program 1 times [2022-11-03 04:07:57,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:57,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799515645] [2022-11-03 04:07:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:57,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 04:07:58,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:58,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799515645] [2022-11-03 04:07:58,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799515645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:58,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948150047] [2022-11-03 04:07:58,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:58,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:58,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:58,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:58,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:07:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:59,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:07:59,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 04:07:59,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:59,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948150047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:59,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:59,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2022-11-03 04:07:59,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032618958] [2022-11-03 04:07:59,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:59,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:59,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:59,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:07:59,080 INFO L87 Difference]: Start difference. First operand 37788 states and 64981 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:08:02,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:02,370 INFO L93 Difference]: Finished difference Result 79303 states and 141251 transitions. [2022-11-03 04:08:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:08:02,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 132 [2022-11-03 04:08:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:02,607 INFO L225 Difference]: With dead ends: 79303 [2022-11-03 04:08:02,607 INFO L226 Difference]: Without dead ends: 41532 [2022-11-03 04:08:02,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:08:02,799 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 211 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:02,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1275 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:08:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41532 states. [2022-11-03 04:08:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41532 to 41532. [2022-11-03 04:08:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41532 states, 31961 states have (on average 1.6239792246800788) internal successors, (51904), 34013 states have internal predecessors, (51904), 6778 states have call successors, (6778), 1992 states have call predecessors, (6778), 2792 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-11-03 04:08:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41532 states to 41532 states and 71989 transitions. [2022-11-03 04:08:06,185 INFO L78 Accepts]: Start accepts. Automaton has 41532 states and 71989 transitions. Word has length 132 [2022-11-03 04:08:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:06,186 INFO L495 AbstractCegarLoop]: Abstraction has 41532 states and 71989 transitions. [2022-11-03 04:08:06,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:08:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 41532 states and 71989 transitions. [2022-11-03 04:08:06,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 04:08:06,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:06,199 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:06,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:06,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 04:08:06,414 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:06,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash -195148788, now seen corresponding path program 1 times [2022-11-03 04:08:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:08:06,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346251757] [2022-11-03 04:08:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:06,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:08:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 04:08:07,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:08:07,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346251757] [2022-11-03 04:08:07,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346251757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:08:07,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138481096] [2022-11-03 04:08:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:07,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:07,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:07,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:07,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e2cec-66b1-442f-b879-b0e262104c9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:08:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:08:08,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 04:08:08,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:08:08,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138481096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:08:08,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:08:08,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2022-11-03 04:08:08,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706965548] [2022-11-03 04:08:08,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:08,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:08:08,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:08:08,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:08:08,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:08:08,459 INFO L87 Difference]: Start difference. First operand 41532 states and 71989 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:08:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:11,641 INFO L93 Difference]: Finished difference Result 86791 states and 155168 transitions. [2022-11-03 04:08:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:08:11,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 136 [2022-11-03 04:08:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:11,863 INFO L225 Difference]: With dead ends: 86791 [2022-11-03 04:08:11,863 INFO L226 Difference]: Without dead ends: 45276 [2022-11-03 04:08:12,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:08:12,225 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 209 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:12,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1275 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:08:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45276 states.