./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product29.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_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/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_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/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_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/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 bf5a3f22f9d7a0aaa2c9864b464fdc1b701547a697c01ddf6ee0cf69e3554ef9 --- 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 03:44:31,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:44:31,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:44:31,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:44:32,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:44:32,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:44:32,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:44:32,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:44:32,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:44:32,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:44:32,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:44:32,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:44:32,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:44:32,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:44:32,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:44:32,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:44:32,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:44:32,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:44:32,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:44:32,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:44:32,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:44:32,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:44:32,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:44:32,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:44:32,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:44:32,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:44:32,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:44:32,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:44:32,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:44:32,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:44:32,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:44:32,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:44:32,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:44:32,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:44:32,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:44:32,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:44:32,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:44:32,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:44:32,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:44:32,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:44:32,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:44:32,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:44:32,134 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:44:32,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:44:32,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:44:32,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:44:32,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:44:32,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:44:32,136 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:44:32,137 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:44:32,137 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:44:32,137 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:44:32,138 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:44:32,139 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:44:32,139 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:44:32,139 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:44:32,139 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:44:32,140 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:44:32,140 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:44:32,140 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:44:32,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:44:32,141 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:44:32,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:44:32,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:44:32,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:44:32,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:44:32,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:44:32,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:44:32,144 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:44:32,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:44:32,144 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:44:32,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:44:32,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:44:32,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:44:32,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:44:32,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:44:32,146 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:44:32,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:44:32,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:44:32,147 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:44:32,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:44:32,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:44:32,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:44:32,148 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_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf5a3f22f9d7a0aaa2c9864b464fdc1b701547a697c01ddf6ee0cf69e3554ef9 [2022-11-03 03:44:32,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:44:32,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:44:32,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:44:32,555 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:44:32,556 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:44:32,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2022-11-03 03:44:32,658 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/data/673e71fb1/7c07d189a68b4f7591d2a727ee459ba1/FLAG0a4af51f5 [2022-11-03 03:44:33,298 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:44:33,299 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2022-11-03 03:44:33,321 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/data/673e71fb1/7c07d189a68b4f7591d2a727ee459ba1/FLAG0a4af51f5 [2022-11-03 03:44:33,487 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/data/673e71fb1/7c07d189a68b4f7591d2a727ee459ba1 [2022-11-03 03:44:33,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:44:33,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:44:33,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:44:33,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:44:33,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:44:33,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:44:33" (1/1) ... [2022-11-03 03:44:33,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@541e8064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:33, skipping insertion in model container [2022-11-03 03:44:33,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:44:33" (1/1) ... [2022-11-03 03:44:33,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:44:33,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:44:33,820 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_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c[1700,1713] [2022-11-03 03:44:34,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:44:34,287 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:44:34,304 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_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c[1700,1713] [2022-11-03 03:44:34,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:44:34,446 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:44:34,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34 WrapperNode [2022-11-03 03:44:34,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:44:34,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:44:34,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:44:34,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:44:34,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,557 INFO L138 Inliner]: procedures = 93, calls = 338, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 864 [2022-11-03 03:44:34,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:44:34,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:44:34,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:44:34,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:44:34,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,627 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:44:34,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:44:34,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:44:34,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:44:34,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (1/1) ... [2022-11-03 03:44:34,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:44:34,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:34,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:44:34,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:44:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:44:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:44:34,822 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:44:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:44:34,822 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:44:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:44:34,823 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:44:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:44:34,823 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:44:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:44:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:44:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 03:44:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 03:44:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:44:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:44:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:44:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:44:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 03:44:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 03:44:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:44:34,826 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:44:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:44:34,826 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:44:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:44:34,827 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:44:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 03:44:34,827 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 03:44:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:44:34,828 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:44:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:44:34,830 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:44:34,831 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:44:34,831 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:44:34,831 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:44:34,831 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:44:34,832 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:44:34,832 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:44:34,832 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-03 03:44:34,832 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-03 03:44:34,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:44:34,833 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 03:44:34,833 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 03:44:34,833 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:44:34,834 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:44:34,834 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:44:34,835 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:44:34,837 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:44:34,837 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:44:34,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:44:34,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:44:34,838 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:44:34,839 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:44:35,010 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:44:35,013 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:44:36,553 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:44:37,492 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:44:37,493 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:44:37,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:44:37 BoogieIcfgContainer [2022-11-03 03:44:37,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:44:37,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:44:37,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:44:37,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:44:37,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:44:33" (1/3) ... [2022-11-03 03:44:37,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af66f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:44:37, skipping insertion in model container [2022-11-03 03:44:37,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:34" (2/3) ... [2022-11-03 03:44:37,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af66f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:44:37, skipping insertion in model container [2022-11-03 03:44:37,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:44:37" (3/3) ... [2022-11-03 03:44:37,510 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product29.cil.c [2022-11-03 03:44:37,531 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:44:37,532 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:44:37,632 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:44:37,649 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;@289fe0ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:44:37,650 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:44:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 365 states, 247 states have (on average 1.5951417004048583) internal successors, (394), 268 states have internal predecessors, (394), 92 states have call successors, (92), 24 states have call predecessors, (92), 24 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:44:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:44:37,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:37,685 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, 1, 1] [2022-11-03 03:44:37,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:37,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1382333594, now seen corresponding path program 1 times [2022-11-03 03:44:37,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:37,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263946510] [2022-11-03 03:44:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:37,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:38,687 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 03:44:38,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:38,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263946510] [2022-11-03 03:44:38,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263946510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:38,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:38,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:44:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516141019] [2022-11-03 03:44:38,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:44:38,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:38,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:44:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:44:38,755 INFO L87 Difference]: Start difference. First operand has 365 states, 247 states have (on average 1.5951417004048583) internal successors, (394), 268 states have internal predecessors, (394), 92 states have call successors, (92), 24 states have call predecessors, (92), 24 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:44:39,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:39,459 INFO L93 Difference]: Finished difference Result 815 states and 1317 transitions. [2022-11-03 03:44:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:44:39,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 65 [2022-11-03 03:44:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:39,493 INFO L225 Difference]: With dead ends: 815 [2022-11-03 03:44:39,494 INFO L226 Difference]: Without dead ends: 463 [2022-11-03 03:44:39,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:39,509 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 249 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:39,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 2225 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:44:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-03 03:44:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2022-11-03 03:44:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 248 states have (on average 1.5766129032258065) internal successors, (391), 267 states have internal predecessors, (391), 92 states have call successors, (92), 24 states have call predecessors, (92), 23 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2022-11-03 03:44:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 570 transitions. [2022-11-03 03:44:39,648 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 570 transitions. Word has length 65 [2022-11-03 03:44:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:39,650 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 570 transitions. [2022-11-03 03:44:39,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:44:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 570 transitions. [2022-11-03 03:44:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 03:44:39,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:39,670 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:39,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:44:39,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:39,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1013499689, now seen corresponding path program 1 times [2022-11-03 03:44:39,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:39,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916093892] [2022-11-03 03:44:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:40,325 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 03:44:40,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:40,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916093892] [2022-11-03 03:44:40,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916093892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:40,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:40,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:44:40,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416392371] [2022-11-03 03:44:40,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:40,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:44:40,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:44:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:44:40,331 INFO L87 Difference]: Start difference. First operand 364 states and 570 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 03:44:43,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:43,999 INFO L93 Difference]: Finished difference Result 1231 states and 1959 transitions. [2022-11-03 03:44:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:44:44,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 68 [2022-11-03 03:44:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:44,014 INFO L225 Difference]: With dead ends: 1231 [2022-11-03 03:44:44,019 INFO L226 Difference]: Without dead ends: 883 [2022-11-03 03:44:44,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:44:44,027 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 1692 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 3458 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 2568 SdHoareTripleChecker+Invalid, 4037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 3458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:44,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1750 Valid, 2568 Invalid, 4037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 3458 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-03 03:44:44,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-03 03:44:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 838. [2022-11-03 03:44:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 592 states have (on average 1.5962837837837838) internal successors, (945), 623 states have internal predecessors, (945), 193 states have call successors, (193), 48 states have call predecessors, (193), 52 states have return successors, (200), 191 states have call predecessors, (200), 188 states have call successors, (200) [2022-11-03 03:44:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1338 transitions. [2022-11-03 03:44:44,105 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1338 transitions. Word has length 68 [2022-11-03 03:44:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:44,106 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1338 transitions. [2022-11-03 03:44:44,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 03:44:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1338 transitions. [2022-11-03 03:44:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:44:44,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:44,109 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:44,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:44:44,110 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:44,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:44,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1534425063, now seen corresponding path program 1 times [2022-11-03 03:44:44,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:44,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740077696] [2022-11-03 03:44:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:44,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:45,621 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 03:44:45,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740077696] [2022-11-03 03:44:45,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740077696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:45,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:45,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:45,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922855118] [2022-11-03 03:44:45,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:45,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:45,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:45,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:45,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:45,628 INFO L87 Difference]: Start difference. First operand 838 states and 1338 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-03 03:44:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:50,493 INFO L93 Difference]: Finished difference Result 3638 states and 5935 transitions. [2022-11-03 03:44:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:44:50,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 73 [2022-11-03 03:44:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:50,523 INFO L225 Difference]: With dead ends: 3638 [2022-11-03 03:44:50,523 INFO L226 Difference]: Without dead ends: 2817 [2022-11-03 03:44:50,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:44:50,538 INFO L413 NwaCegarLoop]: 949 mSDtfsCounter, 2126 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 2930 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2225 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 3865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 2930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:50,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2225 Valid, 2273 Invalid, 3865 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [935 Valid, 2930 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 03:44:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2022-11-03 03:44:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2545. [2022-11-03 03:44:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 1792 states have (on average 1.5904017857142858) internal successors, (2850), 1905 states have internal predecessors, (2850), 607 states have call successors, (607), 129 states have call predecessors, (607), 145 states have return successors, (658), 581 states have call predecessors, (658), 602 states have call successors, (658) [2022-11-03 03:44:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 4115 transitions. [2022-11-03 03:44:50,892 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 4115 transitions. Word has length 73 [2022-11-03 03:44:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:50,895 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 4115 transitions. [2022-11-03 03:44:50,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-03 03:44:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 4115 transitions. [2022-11-03 03:44:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:44:50,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:50,901 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:50,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:44:50,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash 588600825, now seen corresponding path program 1 times [2022-11-03 03:44:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:50,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582584873] [2022-11-03 03:44:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:50,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:51,204 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 03:44:51,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582584873] [2022-11-03 03:44:51,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582584873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:51,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:51,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:51,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864176952] [2022-11-03 03:44:51,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:51,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:51,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:51,209 INFO L87 Difference]: Start difference. First operand 2545 states and 4115 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:44:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:51,672 INFO L93 Difference]: Finished difference Result 4273 states and 6908 transitions. [2022-11-03 03:44:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:44:51,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) Word has length 73 [2022-11-03 03:44:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:51,698 INFO L225 Difference]: With dead ends: 4273 [2022-11-03 03:44:51,698 INFO L226 Difference]: Without dead ends: 2746 [2022-11-03 03:44:51,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:51,712 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 30 mSDsluCounter, 2922 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:51,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3286 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:44:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2022-11-03 03:44:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2618. [2022-11-03 03:44:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 1843 states have (on average 1.5740640260444927) internal successors, (2901), 1958 states have internal predecessors, (2901), 607 states have call successors, (607), 129 states have call predecessors, (607), 167 states have return successors, (705), 601 states have call predecessors, (705), 602 states have call successors, (705) [2022-11-03 03:44:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 4213 transitions. [2022-11-03 03:44:52,027 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 4213 transitions. Word has length 73 [2022-11-03 03:44:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:52,028 INFO L495 AbstractCegarLoop]: Abstraction has 2618 states and 4213 transitions. [2022-11-03 03:44:52,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:44:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 4213 transitions. [2022-11-03 03:44:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 03:44:52,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:52,032 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:52,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:44:52,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:52,033 INFO L85 PathProgramCache]: Analyzing trace with hash 926997819, now seen corresponding path program 1 times [2022-11-03 03:44:52,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:52,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125417762] [2022-11-03 03:44:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:52,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:52,353 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 03:44:52,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:52,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125417762] [2022-11-03 03:44:52,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125417762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:52,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:52,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:52,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540507891] [2022-11-03 03:44:52,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:52,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:52,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:52,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:52,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:52,357 INFO L87 Difference]: Start difference. First operand 2618 states and 4213 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:44:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:52,884 INFO L93 Difference]: Finished difference Result 4371 states and 7031 transitions. [2022-11-03 03:44:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:44:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) Word has length 72 [2022-11-03 03:44:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:52,908 INFO L225 Difference]: With dead ends: 4371 [2022-11-03 03:44:52,908 INFO L226 Difference]: Without dead ends: 2797 [2022-11-03 03:44:52,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:52,920 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 31 mSDsluCounter, 2907 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3267 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:52,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3267 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:44:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-11-03 03:44:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2629. [2022-11-03 03:44:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 1854 states have (on average 1.570658036677454) internal successors, (2912), 1958 states have internal predecessors, (2912), 607 states have call successors, (607), 129 states have call predecessors, (607), 167 states have return successors, (705), 612 states have call predecessors, (705), 602 states have call successors, (705) [2022-11-03 03:44:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 4224 transitions. [2022-11-03 03:44:53,260 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 4224 transitions. Word has length 72 [2022-11-03 03:44:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:53,261 INFO L495 AbstractCegarLoop]: Abstraction has 2629 states and 4224 transitions. [2022-11-03 03:44:53,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:44:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 4224 transitions. [2022-11-03 03:44:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 03:44:53,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:53,266 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:53,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:44:53,266 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:53,267 INFO L85 PathProgramCache]: Analyzing trace with hash -51613873, now seen corresponding path program 1 times [2022-11-03 03:44:53,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:53,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246441568] [2022-11-03 03:44:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:53,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:53,631 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 03:44:53,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:53,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246441568] [2022-11-03 03:44:53,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246441568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:53,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:53,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:44:53,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6213948] [2022-11-03 03:44:53,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:53,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:44:53,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:44:53,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:44:53,634 INFO L87 Difference]: Start difference. First operand 2629 states and 4224 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-03 03:44:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:56,948 INFO L93 Difference]: Finished difference Result 5860 states and 9460 transitions. [2022-11-03 03:44:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:44:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 79 [2022-11-03 03:44:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:56,986 INFO L225 Difference]: With dead ends: 5860 [2022-11-03 03:44:56,987 INFO L226 Difference]: Without dead ends: 3919 [2022-11-03 03:44:57,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:44:57,005 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 1887 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2036 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 3113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:57,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2036 Valid, 1576 Invalid, 3113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:44:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2022-11-03 03:44:57,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3787. [2022-11-03 03:44:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 2624 states have (on average 1.5282012195121952) internal successors, (4010), 2788 states have internal predecessors, (4010), 899 states have call successors, (899), 211 states have call predecessors, (899), 263 states have return successors, (1067), 893 states have call predecessors, (1067), 894 states have call successors, (1067) [2022-11-03 03:44:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 5976 transitions. [2022-11-03 03:44:57,642 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 5976 transitions. Word has length 79 [2022-11-03 03:44:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:57,642 INFO L495 AbstractCegarLoop]: Abstraction has 3787 states and 5976 transitions. [2022-11-03 03:44:57,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-03 03:44:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 5976 transitions. [2022-11-03 03:44:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 03:44:57,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:57,646 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:57,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:44:57,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1770726822, now seen corresponding path program 1 times [2022-11-03 03:44:57,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:57,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042784541] [2022-11-03 03:44:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:57,972 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 03:44:57,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:57,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042784541] [2022-11-03 03:44:57,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042784541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:57,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:57,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:57,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051180333] [2022-11-03 03:44:57,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:57,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:57,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:57,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:57,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:57,974 INFO L87 Difference]: Start difference. First operand 3787 states and 5976 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 03:45:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:00,628 INFO L93 Difference]: Finished difference Result 7022 states and 11117 transitions. [2022-11-03 03:45:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:45:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 82 [2022-11-03 03:45:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:00,659 INFO L225 Difference]: With dead ends: 7022 [2022-11-03 03:45:00,659 INFO L226 Difference]: Without dead ends: 4150 [2022-11-03 03:45:00,673 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 03:45:00,674 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 937 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:00,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 1608 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 03:45:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2022-11-03 03:45:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3868. [2022-11-03 03:45:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 2678 states have (on average 1.5220313666915608) internal successors, (4076), 2854 states have internal predecessors, (4076), 902 states have call successors, (902), 226 states have call predecessors, (902), 287 states have return successors, (1101), 893 states have call predecessors, (1101), 897 states have call successors, (1101) [2022-11-03 03:45:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 6079 transitions. [2022-11-03 03:45:01,158 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 6079 transitions. Word has length 82 [2022-11-03 03:45:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:01,158 INFO L495 AbstractCegarLoop]: Abstraction has 3868 states and 6079 transitions. [2022-11-03 03:45:01,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 03:45:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 6079 transitions. [2022-11-03 03:45:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 03:45:01,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:01,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:01,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:45:01,162 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash -297281669, now seen corresponding path program 1 times [2022-11-03 03:45:01,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:01,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760828626] [2022-11-03 03:45:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:01,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:01,397 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 03:45:01,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:01,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760828626] [2022-11-03 03:45:01,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760828626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:01,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:01,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:45:01,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77030464] [2022-11-03 03:45:01,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:01,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:45:01,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:01,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:45:01,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:45:01,400 INFO L87 Difference]: Start difference. First operand 3868 states and 6079 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:45:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:02,509 INFO L93 Difference]: Finished difference Result 3972 states and 6241 transitions. [2022-11-03 03:45:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:45:02,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 85 [2022-11-03 03:45:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:02,546 INFO L225 Difference]: With dead ends: 3972 [2022-11-03 03:45:02,547 INFO L226 Difference]: Without dead ends: 3957 [2022-11-03 03:45:02,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:45:02,551 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 631 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:02,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 1748 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:45:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2022-11-03 03:45:03,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3874. [2022-11-03 03:45:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3874 states, 2684 states have (on average 1.5208643815201193) internal successors, (4082), 2860 states have internal predecessors, (4082), 902 states have call successors, (902), 226 states have call predecessors, (902), 287 states have return successors, (1101), 893 states have call predecessors, (1101), 897 states have call successors, (1101) [2022-11-03 03:45:03,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3874 states to 3874 states and 6085 transitions. [2022-11-03 03:45:03,078 INFO L78 Accepts]: Start accepts. Automaton has 3874 states and 6085 transitions. Word has length 85 [2022-11-03 03:45:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:03,079 INFO L495 AbstractCegarLoop]: Abstraction has 3874 states and 6085 transitions. [2022-11-03 03:45:03,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:45:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3874 states and 6085 transitions. [2022-11-03 03:45:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 03:45:03,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:03,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:03,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:45:03,083 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:03,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:03,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1900726984, now seen corresponding path program 1 times [2022-11-03 03:45:03,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:03,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2240780] [2022-11-03 03:45:03,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:03,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:03,467 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 03:45:03,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:03,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2240780] [2022-11-03 03:45:03,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2240780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:03,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:03,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:45:03,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476918935] [2022-11-03 03:45:03,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:03,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:45:03,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:03,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:45:03,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:45:03,471 INFO L87 Difference]: Start difference. First operand 3874 states and 6085 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 03:45:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:04,382 INFO L93 Difference]: Finished difference Result 7270 states and 11572 transitions. [2022-11-03 03:45:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:45:04,383 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 90 [2022-11-03 03:45:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:04,420 INFO L225 Difference]: With dead ends: 7270 [2022-11-03 03:45:04,420 INFO L226 Difference]: Without dead ends: 4088 [2022-11-03 03:45:04,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:45:04,440 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 359 mSDsluCounter, 3574 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 3838 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:04,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 3838 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:45:04,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2022-11-03 03:45:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 4074. [2022-11-03 03:45:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4074 states, 2870 states have (on average 1.4989547038327526) internal successors, (4302), 3050 states have internal predecessors, (4302), 907 states have call successors, (907), 231 states have call predecessors, (907), 296 states have return successors, (1102), 898 states have call predecessors, (1102), 902 states have call successors, (1102) [2022-11-03 03:45:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6311 transitions. [2022-11-03 03:45:04,895 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6311 transitions. Word has length 90 [2022-11-03 03:45:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:04,896 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 6311 transitions. [2022-11-03 03:45:04,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 03:45:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6311 transitions. [2022-11-03 03:45:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:45:04,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:04,900 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, 1, 1, 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 03:45:04,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:45:04,900 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:04,901 INFO L85 PathProgramCache]: Analyzing trace with hash 913826912, now seen corresponding path program 1 times [2022-11-03 03:45:04,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:04,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870571243] [2022-11-03 03:45:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:04,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:45:06,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:06,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870571243] [2022-11-03 03:45:06,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870571243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:45:06,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228144942] [2022-11-03 03:45:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:06,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:06,346 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:06,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:45:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:06,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:45:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:45:06,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:45:06,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228144942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:06,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:45:06,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-03 03:45:06,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849066051] [2022-11-03 03:45:06,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:06,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:06,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:06,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:45:06,776 INFO L87 Difference]: Start difference. First operand 4074 states and 6311 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:45:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:07,747 INFO L93 Difference]: Finished difference Result 10947 states and 17097 transitions. [2022-11-03 03:45:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:07,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 98 [2022-11-03 03:45:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:07,788 INFO L225 Difference]: With dead ends: 10947 [2022-11-03 03:45:07,789 INFO L226 Difference]: Without dead ends: 6892 [2022-11-03 03:45:07,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:45:07,807 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 518 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:07,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1151 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:45:07,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6892 states. [2022-11-03 03:45:08,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6892 to 6776. [2022-11-03 03:45:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 4825 states have (on average 1.5094300518134716) internal successors, (7283), 5135 states have internal predecessors, (7283), 1461 states have call successors, (1461), 375 states have call predecessors, (1461), 489 states have return successors, (1840), 1404 states have call predecessors, (1840), 1456 states have call successors, (1840) [2022-11-03 03:45:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 10584 transitions. [2022-11-03 03:45:08,600 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 10584 transitions. Word has length 98 [2022-11-03 03:45:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:08,601 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 10584 transitions. [2022-11-03 03:45:08,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:45:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 10584 transitions. [2022-11-03 03:45:08,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 03:45:08,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:08,605 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, 1, 1, 1, 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 03:45:08,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:08,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:45:08,830 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:08,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1736265868, now seen corresponding path program 1 times [2022-11-03 03:45:08,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:08,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806424962] [2022-11-03 03:45:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:08,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:45:10,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:10,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806424962] [2022-11-03 03:45:10,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806424962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:45:10,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635560845] [2022-11-03 03:45:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:10,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:10,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:10,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:10,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:45:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:10,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:45:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:45:10,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:45:10,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635560845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:10,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:45:10,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-03 03:45:10,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473373046] [2022-11-03 03:45:10,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:10,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:10,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:10,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:45:10,592 INFO L87 Difference]: Start difference. First operand 6776 states and 10584 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:45:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:11,867 INFO L93 Difference]: Finished difference Result 19052 states and 30041 transitions. [2022-11-03 03:45:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:11,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 99 [2022-11-03 03:45:11,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:11,957 INFO L225 Difference]: With dead ends: 19052 [2022-11-03 03:45:11,957 INFO L226 Difference]: Without dead ends: 12298 [2022-11-03 03:45:11,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:45:11,991 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 517 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:11,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1168 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:45:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12298 states. [2022-11-03 03:45:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12298 to 12181. [2022-11-03 03:45:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 8736 states have (on average 1.5154532967032968) internal successors, (13239), 9306 states have internal predecessors, (13239), 2569 states have call successors, (2569), 663 states have call predecessors, (2569), 875 states have return successors, (3388), 2416 states have call predecessors, (3388), 2564 states have call successors, (3388) [2022-11-03 03:45:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 19196 transitions. [2022-11-03 03:45:13,572 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 19196 transitions. Word has length 99 [2022-11-03 03:45:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:13,573 INFO L495 AbstractCegarLoop]: Abstraction has 12181 states and 19196 transitions. [2022-11-03 03:45:13,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:45:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 19196 transitions. [2022-11-03 03:45:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 03:45:13,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:13,577 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, 1, 1, 1, 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 03:45:13,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:13,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:13,790 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:13,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1958047486, now seen corresponding path program 1 times [2022-11-03 03:45:13,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:13,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262270004] [2022-11-03 03:45:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:13,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:45:15,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:15,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262270004] [2022-11-03 03:45:15,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262270004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:45:15,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625085636] [2022-11-03 03:45:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:15,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:15,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:15,230 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:15,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:45:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:15,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:45:15,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:45:15,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:45:15,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625085636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:15,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:45:15,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-03 03:45:15,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913236088] [2022-11-03 03:45:15,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:45:15,646 INFO L87 Difference]: Start difference. First operand 12181 states and 19196 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:45:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:17,335 INFO L93 Difference]: Finished difference Result 35263 states and 56274 transitions. [2022-11-03 03:45:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:17,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 99 [2022-11-03 03:45:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:17,471 INFO L225 Difference]: With dead ends: 35263 [2022-11-03 03:45:17,471 INFO L226 Difference]: Without dead ends: 23110 [2022-11-03 03:45:17,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:45:17,522 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 516 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:17,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 1174 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:45:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23110 states. [2022-11-03 03:45:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23110 to 22992. [2022-11-03 03:45:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22992 states, 16559 states have (on average 1.517664110151579) internal successors, (25131), 17649 states have internal predecessors, (25131), 4785 states have call successors, (4785), 1239 states have call predecessors, (4785), 1647 states have return successors, (6736), 4440 states have call predecessors, (6736), 4780 states have call successors, (6736) [2022-11-03 03:45:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22992 states to 22992 states and 36652 transitions. [2022-11-03 03:45:20,478 INFO L78 Accepts]: Start accepts. Automaton has 22992 states and 36652 transitions. Word has length 99 [2022-11-03 03:45:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:20,490 INFO L495 AbstractCegarLoop]: Abstraction has 22992 states and 36652 transitions. [2022-11-03 03:45:20,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:45:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 22992 states and 36652 transitions. [2022-11-03 03:45:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 03:45:20,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:20,494 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, 1, 1, 1, 1, 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 03:45:20,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:20,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:20,712 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:20,712 INFO L85 PathProgramCache]: Analyzing trace with hash -570051178, now seen corresponding path program 1 times [2022-11-03 03:45:20,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:20,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563712244] [2022-11-03 03:45:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:20,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:45:22,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563712244] [2022-11-03 03:45:22,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563712244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:45:22,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491116667] [2022-11-03 03:45:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:22,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:22,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:22,144 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:22,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:45:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:22,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:45:22,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:45:22,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:45:22,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491116667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:22,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:45:22,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-03 03:45:22,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573502050] [2022-11-03 03:45:22,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:22,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:22,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:22,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:45:22,616 INFO L87 Difference]: Start difference. First operand 22992 states and 36652 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:45:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:26,184 INFO L93 Difference]: Finished difference Result 67686 states and 109967 transitions. [2022-11-03 03:45:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:26,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 100 [2022-11-03 03:45:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:26,447 INFO L225 Difference]: With dead ends: 67686 [2022-11-03 03:45:26,447 INFO L226 Difference]: Without dead ends: 44734 [2022-11-03 03:45:26,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:45:26,548 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 515 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:26,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1180 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:45:26,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44734 states. [2022-11-03 03:45:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44734 to 44615. [2022-11-03 03:45:31,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44615 states, 32206 states have (on average 1.5173259641060672) internal successors, (48867), 34336 states have internal predecessors, (48867), 9217 states have call successors, (9217), 2391 states have call predecessors, (9217), 3191 states have return successors, (14332), 8488 states have call predecessors, (14332), 9212 states have call successors, (14332) [2022-11-03 03:45:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44615 states to 44615 states and 72416 transitions. [2022-11-03 03:45:31,634 INFO L78 Accepts]: Start accepts. Automaton has 44615 states and 72416 transitions. Word has length 100 [2022-11-03 03:45:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:31,635 INFO L495 AbstractCegarLoop]: Abstraction has 44615 states and 72416 transitions. [2022-11-03 03:45:31,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:45:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 44615 states and 72416 transitions. [2022-11-03 03:45:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 03:45:31,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:31,641 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, 1, 1, 1, 1, 1, 1, 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 03:45:31,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 03:45:31,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:45:31,854 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash -929484828, now seen corresponding path program 1 times [2022-11-03 03:45:31,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:31,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046055033] [2022-11-03 03:45:31,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:31,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:45:33,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:33,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046055033] [2022-11-03 03:45:33,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046055033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:45:33,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676656536] [2022-11-03 03:45:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:33,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:33,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:33,723 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:33,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:45:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:34,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:45:34,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:45:34,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:45:34,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676656536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:34,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:45:34,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-03 03:45:34,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693390181] [2022-11-03 03:45:34,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:34,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:34,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:34,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:34,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:45:34,118 INFO L87 Difference]: Start difference. First operand 44615 states and 72416 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:45:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:37,598 INFO L93 Difference]: Finished difference Result 47438 states and 77277 transitions. [2022-11-03 03:45:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2022-11-03 03:45:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:37,997 INFO L225 Difference]: With dead ends: 47438 [2022-11-03 03:45:37,997 INFO L226 Difference]: Without dead ends: 47427 [2022-11-03 03:45:38,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:45:38,038 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 501 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:38,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1178 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:45:38,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47427 states. [2022-11-03 03:45:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47427 to 47307. [2022-11-03 03:45:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47307 states, 34152 states have (on average 1.5163387210119466) internal successors, (51786), 36412 states have internal predecessors, (51786), 9771 states have call successors, (9771), 2535 states have call predecessors, (9771), 3383 states have return successors, (15519), 8993 states have call predecessors, (15519), 9766 states have call successors, (15519) [2022-11-03 03:45:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47307 states to 47307 states and 77076 transitions. [2022-11-03 03:45:42,719 INFO L78 Accepts]: Start accepts. Automaton has 47307 states and 77076 transitions. Word has length 102 [2022-11-03 03:45:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:42,720 INFO L495 AbstractCegarLoop]: Abstraction has 47307 states and 77076 transitions. [2022-11-03 03:45:42,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:45:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 47307 states and 77076 transitions. [2022-11-03 03:45:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 03:45:42,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:42,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:42,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:42,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:45:42,930 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash -743592040, now seen corresponding path program 1 times [2022-11-03 03:45:42,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:42,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659820161] [2022-11-03 03:45:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:42,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:43,309 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 03:45:43,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:43,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659820161] [2022-11-03 03:45:43,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659820161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:45:43,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678551912] [2022-11-03 03:45:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:43,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:43,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:43,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:43,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d980a9-2bd5-4585-84bf-8c30f7f1c02a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:45:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:43,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:45:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:43,776 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 03:45:43,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:45:43,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678551912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:43,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:45:43,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:45:43,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145404419] [2022-11-03 03:45:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:43,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:45:43,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:45:43,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:45:43,779 INFO L87 Difference]: Start difference. First operand 47307 states and 77076 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23)