./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.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_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- 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 [2022-11-02 20:25:44,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:25:44,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:25:44,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:25:44,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:25:44,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:25:44,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:25:44,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:25:44,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:25:44,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:25:44,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:25:44,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:25:44,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:25:44,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:25:44,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:25:44,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:25:44,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:25:44,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:25:44,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:25:44,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:25:44,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:25:44,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:25:44,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:25:44,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:25:44,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:25:44,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:25:44,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:25:44,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:25:44,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:25:44,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:25:44,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:25:44,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:25:44,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:25:44,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:25:44,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:25:44,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:25:44,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:25:44,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:25:44,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:25:44,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:25:44,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:25:44,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:25:44,990 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:25:44,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:25:44,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:25:44,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:25:44,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:25:44,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:25:44,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:25:44,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:25:44,994 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:25:44,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:25:44,994 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:25:44,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:25:44,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:25:44,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:25:44,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:25:44,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:25:44,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:25:44,996 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:25:44,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:25:44,997 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:25:44,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:25:44,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:25:44,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:25:44,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:25:44,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:25:44,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:25:44,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:25:44,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:25:44,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:25:44,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:25:45,000 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:25:45,000 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:25:45,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:25:45,001 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_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2022-11-02 20:25:45,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:25:45,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:25:45,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:25:45,321 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:25:45,321 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:25:45,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2022-11-02 20:25:45,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/data/eff3d4dcf/c9ff39e4d1874b1b98592a9ec096bd6c/FLAG66b0e01f8 [2022-11-02 20:25:46,065 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:25:46,066 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2022-11-02 20:25:46,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/data/eff3d4dcf/c9ff39e4d1874b1b98592a9ec096bd6c/FLAG66b0e01f8 [2022-11-02 20:25:46,305 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/data/eff3d4dcf/c9ff39e4d1874b1b98592a9ec096bd6c [2022-11-02 20:25:46,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:25:46,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:25:46,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:25:46,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:25:46,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:25:46,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:25:46" (1/1) ... [2022-11-02 20:25:46,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f3328c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:46, skipping insertion in model container [2022-11-02 20:25:46,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:25:46" (1/1) ... [2022-11-02 20:25:46,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:25:46,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:25:46,767 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_0d4fe1a6-3e31-4bd6-af19-45be91247911/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2022-11-02 20:25:46,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:25:46,941 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:25:46,991 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_0d4fe1a6-3e31-4bd6-af19-45be91247911/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2022-11-02 20:25:47,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:25:47,058 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:25:47,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47 WrapperNode [2022-11-02 20:25:47,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:25:47,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:25:47,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:25:47,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:25:47,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,159 INFO L138 Inliner]: procedures = 90, calls = 344, calls flagged for inlining = 25, calls inlined = 21, statements flattened = 819 [2022-11-02 20:25:47,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:25:47,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:25:47,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:25:47,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:25:47,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,234 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:25:47,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:25:47,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:25:47,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:25:47,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (1/1) ... [2022-11-02 20:25:47,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:25:47,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:47,309 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:25:47,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:25:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:25:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-02 20:25:47,356 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-02 20:25:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-02 20:25:47,356 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-02 20:25:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-02 20:25:47,356 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-02 20:25:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-02 20:25:47,358 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-02 20:25:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-02 20:25:47,359 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-02 20:25:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-02 20:25:47,359 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-02 20:25:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-02 20:25:47,360 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-02 20:25:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-02 20:25:47,360 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-02 20:25:47,361 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-02 20:25:47,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-02 20:25:47,361 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-02 20:25:47,361 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-02 20:25:47,361 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-02 20:25:47,361 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-02 20:25:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-02 20:25:47,362 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-02 20:25:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-02 20:25:47,362 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-02 20:25:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-02 20:25:47,362 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-02 20:25:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-02 20:25:47,363 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-02 20:25:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-02 20:25:47,363 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-02 20:25:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-02 20:25:47,363 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-02 20:25:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-02 20:25:47,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-02 20:25:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-02 20:25:47,364 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-02 20:25:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:25:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2022-11-02 20:25:47,365 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2022-11-02 20:25:47,365 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-02 20:25:47,365 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-02 20:25:47,365 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-02 20:25:47,366 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-02 20:25:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-02 20:25:47,366 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-02 20:25:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-02 20:25:47,366 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-02 20:25:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:25:47,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:25:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-02 20:25:47,367 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-02 20:25:47,596 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:25:47,599 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:25:48,833 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:25:48,846 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:25:48,846 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:25:48,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:25:48 BoogieIcfgContainer [2022-11-02 20:25:48,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:25:48,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:25:48,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:25:48,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:25:48,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:25:46" (1/3) ... [2022-11-02 20:25:48,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503c2f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:25:48, skipping insertion in model container [2022-11-02 20:25:48,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:47" (2/3) ... [2022-11-02 20:25:48,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503c2f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:25:48, skipping insertion in model container [2022-11-02 20:25:48,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:25:48" (3/3) ... [2022-11-02 20:25:48,867 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2022-11-02 20:25:48,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:25:48,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:25:48,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:25:48,992 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=PETRI_NET, 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;@1f066f13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:25:48,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:25:49,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 569 states, 440 states have (on average 1.684090909090909) internal successors, (741), 460 states have internal predecessors, (741), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-02 20:25:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 20:25:49,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:49,034 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] [2022-11-02 20:25:49,035 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:25:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:49,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1004821235, now seen corresponding path program 1 times [2022-11-02 20:25:49,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:49,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687822459] [2022-11-02 20:25:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:49,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:50,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:25:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:50,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:25:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:50,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:25:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:50,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:25:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:50,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:25:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:50,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:25:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:50,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:25:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:25:50,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:50,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687822459] [2022-11-02 20:25:50,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687822459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:50,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:50,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:25:50,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822030744] [2022-11-02 20:25:50,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:50,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:25:50,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:50,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:25:50,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:25:50,424 INFO L87 Difference]: Start difference. First operand has 569 states, 440 states have (on average 1.684090909090909) internal successors, (741), 460 states have internal predecessors, (741), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:25:58,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:58,492 INFO L93 Difference]: Finished difference Result 1410 states and 2435 transitions. [2022-11-02 20:25:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:25:58,495 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2022-11-02 20:25:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:58,515 INFO L225 Difference]: With dead ends: 1410 [2022-11-02 20:25:58,515 INFO L226 Difference]: Without dead ends: 845 [2022-11-02 20:25:58,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:25:58,529 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 1486 mSDsluCounter, 2100 mSDsCounter, 0 mSdLazyCounter, 4721 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 2975 SdHoareTripleChecker+Invalid, 5158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 4721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:58,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1589 Valid, 2975 Invalid, 5158 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [437 Valid, 4721 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-02 20:25:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-02 20:25:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 572. [2022-11-02 20:25:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 443 states have (on average 1.674943566591422) internal successors, (742), 463 states have internal predecessors, (742), 103 states have call successors, (103), 25 states have call predecessors, (103), 25 states have return successors, (102), 97 states have call predecessors, (102), 100 states have call successors, (102) [2022-11-02 20:25:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 947 transitions. [2022-11-02 20:25:58,794 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 947 transitions. Word has length 63 [2022-11-02 20:25:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:58,795 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 947 transitions. [2022-11-02 20:25:58,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:25:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 947 transitions. [2022-11-02 20:25:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 20:25:58,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:58,799 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] [2022-11-02 20:25:58,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:25:58,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:25:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:58,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1059831445, now seen corresponding path program 1 times [2022-11-02 20:25:58,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:58,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139136354] [2022-11-02 20:25:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:58,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:59,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:25:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:59,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:25:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:59,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:25:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:59,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:25:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:59,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:25:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:59,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-02 20:25:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:59,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-02 20:25:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:25:59,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:59,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139136354] [2022-11-02 20:25:59,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139136354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:59,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:59,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:25:59,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916394540] [2022-11-02 20:25:59,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:59,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:25:59,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:59,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:25:59,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:25:59,329 INFO L87 Difference]: Start difference. First operand 572 states and 947 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:07,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:07,469 INFO L93 Difference]: Finished difference Result 1404 states and 2399 transitions. [2022-11-02 20:26:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:26:07,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2022-11-02 20:26:07,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:07,479 INFO L225 Difference]: With dead ends: 1404 [2022-11-02 20:26:07,480 INFO L226 Difference]: Without dead ends: 848 [2022-11-02 20:26:07,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:26:07,489 INFO L413 NwaCegarLoop]: 877 mSDtfsCounter, 1420 mSDsluCounter, 2193 mSDsCounter, 0 mSdLazyCounter, 4776 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 3070 SdHoareTripleChecker+Invalid, 5211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 4776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:07,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 3070 Invalid, 5211 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [435 Valid, 4776 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-02 20:26:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-11-02 20:26:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 572. [2022-11-02 20:26:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 443 states have (on average 1.672686230248307) internal successors, (741), 463 states have internal predecessors, (741), 103 states have call successors, (103), 25 states have call predecessors, (103), 25 states have return successors, (102), 97 states have call predecessors, (102), 100 states have call successors, (102) [2022-11-02 20:26:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 946 transitions. [2022-11-02 20:26:07,659 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 946 transitions. Word has length 64 [2022-11-02 20:26:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:07,661 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 946 transitions. [2022-11-02 20:26:07,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 946 transitions. [2022-11-02 20:26:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 20:26:07,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:07,666 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] [2022-11-02 20:26:07,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:26:07,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:26:07,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1766289498, now seen corresponding path program 1 times [2022-11-02 20:26:07,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:07,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636131696] [2022-11-02 20:26:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:07,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:07,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:08,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:08,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:26:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:08,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:26:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:08,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-02 20:26:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-02 20:26:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:26:08,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:08,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636131696] [2022-11-02 20:26:08,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636131696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:08,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:26:08,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:26:08,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194759337] [2022-11-02 20:26:08,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:08,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:26:08,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:26:08,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:26:08,141 INFO L87 Difference]: Start difference. First operand 572 states and 946 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:26:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:14,450 INFO L93 Difference]: Finished difference Result 1395 states and 2379 transitions. [2022-11-02 20:26:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:26:14,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2022-11-02 20:26:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:14,457 INFO L225 Difference]: With dead ends: 1395 [2022-11-02 20:26:14,457 INFO L226 Difference]: Without dead ends: 808 [2022-11-02 20:26:14,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:26:14,460 INFO L413 NwaCegarLoop]: 884 mSDtfsCounter, 786 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 2658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:14,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1904 Invalid, 2658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-02 20:26:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-11-02 20:26:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 548. [2022-11-02 20:26:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 422 states have (on average 1.6635071090047393) internal successors, (702), 440 states have internal predecessors, (702), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-02 20:26:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 903 transitions. [2022-11-02 20:26:14,559 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 903 transitions. Word has length 64 [2022-11-02 20:26:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:14,560 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 903 transitions. [2022-11-02 20:26:14,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:26:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 903 transitions. [2022-11-02 20:26:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 20:26:14,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:14,561 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] [2022-11-02 20:26:14,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:26:14,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:26:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:14,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1197979303, now seen corresponding path program 1 times [2022-11-02 20:26:14,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:14,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327121727] [2022-11-02 20:26:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:14,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:14,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:14,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:14,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:26:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:15,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:15,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:15,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 20:26:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:15,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 20:26:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:26:15,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:15,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327121727] [2022-11-02 20:26:15,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327121727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:15,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:26:15,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:26:15,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573304083] [2022-11-02 20:26:15,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:15,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:26:15,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:26:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:26:15,117 INFO L87 Difference]: Start difference. First operand 548 states and 903 transitions. Second operand has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:22,183 INFO L93 Difference]: Finished difference Result 1358 states and 2310 transitions. [2022-11-02 20:26:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:26:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-02 20:26:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:22,197 INFO L225 Difference]: With dead ends: 1358 [2022-11-02 20:26:22,198 INFO L226 Difference]: Without dead ends: 802 [2022-11-02 20:26:22,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:26:22,212 INFO L413 NwaCegarLoop]: 832 mSDtfsCounter, 1417 mSDsluCounter, 2001 mSDsCounter, 0 mSdLazyCounter, 4567 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 2833 SdHoareTripleChecker+Invalid, 5003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 4567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:22,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 2833 Invalid, 5003 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [436 Valid, 4567 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-02 20:26:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-02 20:26:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 542. [2022-11-02 20:26:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 416 states have (on average 1.65625) internal successors, (689), 434 states have internal predecessors, (689), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-02 20:26:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 890 transitions. [2022-11-02 20:26:22,367 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 890 transitions. Word has length 65 [2022-11-02 20:26:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:22,368 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 890 transitions. [2022-11-02 20:26:22,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 890 transitions. [2022-11-02 20:26:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:26:22,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:22,370 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] [2022-11-02 20:26:22,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:26:22,370 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:26:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:22,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1604724541, now seen corresponding path program 1 times [2022-11-02 20:26:22,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:22,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420488388] [2022-11-02 20:26:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:22,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:22,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:22,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:22,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:26:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:22,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:22,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:22,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-02 20:26:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:22,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-02 20:26:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:26:22,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:22,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420488388] [2022-11-02 20:26:22,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420488388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:22,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:26:22,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:26:22,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338200379] [2022-11-02 20:26:22,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:22,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:26:22,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:26:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:26:22,878 INFO L87 Difference]: Start difference. First operand 542 states and 890 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:29,730 INFO L93 Difference]: Finished difference Result 1328 states and 2259 transitions. [2022-11-02 20:26:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:26:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 66 [2022-11-02 20:26:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:29,737 INFO L225 Difference]: With dead ends: 1328 [2022-11-02 20:26:29,737 INFO L226 Difference]: Without dead ends: 802 [2022-11-02 20:26:29,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:26:29,741 INFO L413 NwaCegarLoop]: 844 mSDtfsCounter, 1358 mSDsluCounter, 2209 mSDsCounter, 0 mSdLazyCounter, 4505 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 3053 SdHoareTripleChecker+Invalid, 4919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 4505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:29,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 3053 Invalid, 4919 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [414 Valid, 4505 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-02 20:26:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-02 20:26:29,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 542. [2022-11-02 20:26:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 416 states have (on average 1.6538461538461537) internal successors, (688), 434 states have internal predecessors, (688), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-02 20:26:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 889 transitions. [2022-11-02 20:26:29,837 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 889 transitions. Word has length 66 [2022-11-02 20:26:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:29,838 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 889 transitions. [2022-11-02 20:26:29,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 889 transitions. [2022-11-02 20:26:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:26:29,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:29,840 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] [2022-11-02 20:26:29,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:26:29,840 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:26:29,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:29,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1448692618, now seen corresponding path program 1 times [2022-11-02 20:26:29,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:29,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871458403] [2022-11-02 20:26:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:29,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:30,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:30,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:30,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:26:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:30,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:30,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:30,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-02 20:26:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:30,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:26:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:26:30,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:30,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871458403] [2022-11-02 20:26:30,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871458403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:30,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:26:30,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:26:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155333544] [2022-11-02 20:26:30,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:30,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:26:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:26:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:26:30,338 INFO L87 Difference]: Start difference. First operand 542 states and 889 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:37,154 INFO L93 Difference]: Finished difference Result 1346 states and 2279 transitions. [2022-11-02 20:26:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:26:37,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 67 [2022-11-02 20:26:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:37,161 INFO L225 Difference]: With dead ends: 1346 [2022-11-02 20:26:37,161 INFO L226 Difference]: Without dead ends: 796 [2022-11-02 20:26:37,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:26:37,165 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 1349 mSDsluCounter, 2221 mSDsCounter, 0 mSdLazyCounter, 4481 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 3080 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 4481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:37,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1451 Valid, 3080 Invalid, 4905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [424 Valid, 4481 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-02 20:26:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-11-02 20:26:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 536. [2022-11-02 20:26:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 410 states have (on average 1.646341463414634) internal successors, (675), 428 states have internal predecessors, (675), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-02 20:26:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 876 transitions. [2022-11-02 20:26:37,294 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 876 transitions. Word has length 67 [2022-11-02 20:26:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:37,294 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 876 transitions. [2022-11-02 20:26:37,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 876 transitions. [2022-11-02 20:26:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 20:26:37,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:37,296 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] [2022-11-02 20:26:37,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:26:37,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:26:37,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:37,297 INFO L85 PathProgramCache]: Analyzing trace with hash 148336254, now seen corresponding path program 1 times [2022-11-02 20:26:37,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:37,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413737269] [2022-11-02 20:26:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:37,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:37,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:37,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:37,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:26:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:37,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:37,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:37,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:26:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:37,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 20:26:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:26:37,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:37,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413737269] [2022-11-02 20:26:37,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413737269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:37,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:26:37,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:26:37,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752714766] [2022-11-02 20:26:37,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:37,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:26:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:37,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:26:37,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:26:37,766 INFO L87 Difference]: Start difference. First operand 536 states and 876 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:44,784 INFO L93 Difference]: Finished difference Result 1316 states and 2230 transitions. [2022-11-02 20:26:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:26:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2022-11-02 20:26:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:44,790 INFO L225 Difference]: With dead ends: 1316 [2022-11-02 20:26:44,790 INFO L226 Difference]: Without dead ends: 796 [2022-11-02 20:26:44,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:26:44,794 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 775 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 4585 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 2991 SdHoareTripleChecker+Invalid, 4801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 4585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:44,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 2991 Invalid, 4801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 4585 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-02 20:26:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-11-02 20:26:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 536. [2022-11-02 20:26:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 410 states have (on average 1.6439024390243901) internal successors, (674), 428 states have internal predecessors, (674), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-02 20:26:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 875 transitions. [2022-11-02 20:26:44,910 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 875 transitions. Word has length 68 [2022-11-02 20:26:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:44,910 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 875 transitions. [2022-11-02 20:26:44,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:44,910 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 875 transitions. [2022-11-02 20:26:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:26:44,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:44,916 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] [2022-11-02 20:26:44,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:26:44,917 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:26:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash 685380634, now seen corresponding path program 1 times [2022-11-02 20:26:44,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:44,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002210657] [2022-11-02 20:26:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:44,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:45,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:45,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:45,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:26:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:45,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:45,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:45,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 20:26:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:45,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:26:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:26:45,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:45,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002210657] [2022-11-02 20:26:45,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002210657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:45,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:26:45,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:26:45,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055684313] [2022-11-02 20:26:45,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:45,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:26:45,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:45,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:26:45,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:26:45,398 INFO L87 Difference]: Start difference. First operand 536 states and 875 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:52,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:52,634 INFO L93 Difference]: Finished difference Result 1334 states and 2248 transitions. [2022-11-02 20:26:52,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:26:52,635 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2022-11-02 20:26:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:52,640 INFO L225 Difference]: With dead ends: 1334 [2022-11-02 20:26:52,641 INFO L226 Difference]: Without dead ends: 790 [2022-11-02 20:26:52,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:26:52,644 INFO L413 NwaCegarLoop]: 856 mSDtfsCounter, 802 mSDsluCounter, 2330 mSDsCounter, 0 mSdLazyCounter, 4558 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 3186 SdHoareTripleChecker+Invalid, 4768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 4558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:52,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 3186 Invalid, 4768 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [210 Valid, 4558 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-02 20:26:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-02 20:26:52,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 530. [2022-11-02 20:26:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 404 states have (on average 1.636138613861386) internal successors, (661), 422 states have internal predecessors, (661), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-02 20:26:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 862 transitions. [2022-11-02 20:26:52,759 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 862 transitions. Word has length 69 [2022-11-02 20:26:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:52,760 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 862 transitions. [2022-11-02 20:26:52,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 862 transitions. [2022-11-02 20:26:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:26:52,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:52,761 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] [2022-11-02 20:26:52,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:26:52,761 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:26:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1086867271, now seen corresponding path program 1 times [2022-11-02 20:26:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:52,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124802416] [2022-11-02 20:26:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:52,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:53,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:53,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:53,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:26:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:53,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:26:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:53,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:26:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:53,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 20:26:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:53,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:26:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:26:53,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:53,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124802416] [2022-11-02 20:26:53,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124802416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:53,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:26:53,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:26:53,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560622768] [2022-11-02 20:26:53,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:53,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:26:53,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:53,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:26:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:26:53,228 INFO L87 Difference]: Start difference. First operand 530 states and 862 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:26:59,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:59,877 INFO L93 Difference]: Finished difference Result 1304 states and 2201 transitions. [2022-11-02 20:26:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:26:59,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2022-11-02 20:26:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:59,884 INFO L225 Difference]: With dead ends: 1304 [2022-11-02 20:26:59,884 INFO L226 Difference]: Without dead ends: 790 [2022-11-02 20:26:59,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:26:59,887 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 1316 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 4325 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 4763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 4325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:59,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 2694 Invalid, 4763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 4325 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-02 20:26:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-02 20:27:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 530. [2022-11-02 20:27:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 404 states have (on average 1.6336633663366336) internal successors, (660), 422 states have internal predecessors, (660), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-02 20:27:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 861 transitions. [2022-11-02 20:27:00,007 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 861 transitions. Word has length 69 [2022-11-02 20:27:00,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:00,007 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 861 transitions. [2022-11-02 20:27:00,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:27:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 861 transitions. [2022-11-02 20:27:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 20:27:00,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:00,009 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] [2022-11-02 20:27:00,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:27:00,009 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:27:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1086246916, now seen corresponding path program 1 times [2022-11-02 20:27:00,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:00,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984976345] [2022-11-02 20:27:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:00,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:00,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:00,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:00,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:27:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:00,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:00,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:27:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:00,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-02 20:27:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:27:00,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:00,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984976345] [2022-11-02 20:27:00,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984976345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:00,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:00,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:27:00,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993306429] [2022-11-02 20:27:00,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:00,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:27:00,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:00,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:27:00,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:27:00,496 INFO L87 Difference]: Start difference. First operand 530 states and 861 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:27:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:07,400 INFO L93 Difference]: Finished difference Result 1316 states and 2211 transitions. [2022-11-02 20:27:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:27:07,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2022-11-02 20:27:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:07,405 INFO L225 Difference]: With dead ends: 1316 [2022-11-02 20:27:07,406 INFO L226 Difference]: Without dead ends: 802 [2022-11-02 20:27:07,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:27:07,408 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 1280 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 4369 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 4784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 4369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:07,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1382 Valid, 3192 Invalid, 4784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 4369 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-02 20:27:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-02 20:27:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 536. [2022-11-02 20:27:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 410 states have (on average 1.6243902439024391) internal successors, (666), 428 states have internal predecessors, (666), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-02 20:27:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 867 transitions. [2022-11-02 20:27:07,525 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 867 transitions. Word has length 70 [2022-11-02 20:27:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:07,526 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 867 transitions. [2022-11-02 20:27:07,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:27:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 867 transitions. [2022-11-02 20:27:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 20:27:07,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:07,527 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] [2022-11-02 20:27:07,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:27:07,527 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:27:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:07,528 INFO L85 PathProgramCache]: Analyzing trace with hash 242241414, now seen corresponding path program 1 times [2022-11-02 20:27:07,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:07,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755357065] [2022-11-02 20:27:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:07,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:07,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:07,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:07,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:27:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:07,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:07,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:07,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:27:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:07,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-02 20:27:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:27:07,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:07,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755357065] [2022-11-02 20:27:07,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755357065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:07,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:07,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:27:07,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821390015] [2022-11-02 20:27:07,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:07,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:27:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:07,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:27:07,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:27:07,986 INFO L87 Difference]: Start difference. First operand 536 states and 867 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:27:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:14,742 INFO L93 Difference]: Finished difference Result 1319 states and 2212 transitions. [2022-11-02 20:27:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:27:14,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2022-11-02 20:27:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:14,748 INFO L225 Difference]: With dead ends: 1319 [2022-11-02 20:27:14,748 INFO L226 Difference]: Without dead ends: 790 [2022-11-02 20:27:14,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:27:14,751 INFO L413 NwaCegarLoop]: 832 mSDtfsCounter, 1308 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 4338 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 3098 SdHoareTripleChecker+Invalid, 4748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 4338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:14,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1410 Valid, 3098 Invalid, 4748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 4338 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-02 20:27:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-02 20:27:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 530. [2022-11-02 20:27:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 404 states have (on average 1.631188118811881) internal successors, (659), 422 states have internal predecessors, (659), 102 states have call successors, (102), 25 states have call predecessors, (102), 23 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-02 20:27:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 860 transitions. [2022-11-02 20:27:14,894 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 860 transitions. Word has length 70 [2022-11-02 20:27:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:14,895 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 860 transitions. [2022-11-02 20:27:14,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:27:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 860 transitions. [2022-11-02 20:27:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:27:14,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:14,897 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] [2022-11-02 20:27:14,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:27:14,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:27:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash 961451487, now seen corresponding path program 1 times [2022-11-02 20:27:14,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:14,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432477364] [2022-11-02 20:27:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:14,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:15,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:15,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:15,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:27:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:15,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:15,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:15,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:27:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:15,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-02 20:27:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:27:15,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:15,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432477364] [2022-11-02 20:27:15,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432477364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:15,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847341342] [2022-11-02 20:27:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:15,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:15,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:15,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:15,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:27:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:27:15,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:15,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:27:15,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847341342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:15,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:27:15,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-02 20:27:15,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422250304] [2022-11-02 20:27:15,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:15,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:27:15,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:27:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:27:15,829 INFO L87 Difference]: Start difference. First operand 530 states and 860 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:27:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:16,175 INFO L93 Difference]: Finished difference Result 1502 states and 2470 transitions. [2022-11-02 20:27:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:27:16,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 71 [2022-11-02 20:27:16,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:16,182 INFO L225 Difference]: With dead ends: 1502 [2022-11-02 20:27:16,182 INFO L226 Difference]: Without dead ends: 990 [2022-11-02 20:27:16,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:27:16,185 INFO L413 NwaCegarLoop]: 946 mSDtfsCounter, 828 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:16,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 1704 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:27:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-02 20:27:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 975. [2022-11-02 20:27:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 750 states have (on average 1.6453333333333333) internal successors, (1234), 785 states have internal predecessors, (1234), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2022-11-02 20:27:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1596 transitions. [2022-11-02 20:27:16,422 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1596 transitions. Word has length 71 [2022-11-02 20:27:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:16,422 INFO L495 AbstractCegarLoop]: Abstraction has 975 states and 1596 transitions. [2022-11-02 20:27:16,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:27:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1596 transitions. [2022-11-02 20:27:16,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 20:27:16,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:16,424 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] [2022-11-02 20:27:16,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:27:16,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:16,644 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:27:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash 578313413, now seen corresponding path program 1 times [2022-11-02 20:27:16,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:16,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471053417] [2022-11-02 20:27:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:16,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:16,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:17,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:17,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:27:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:17,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:17,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:17,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:27:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:17,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-02 20:27:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:27:17,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:17,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471053417] [2022-11-02 20:27:17,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471053417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:17,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612133355] [2022-11-02 20:27:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:17,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:17,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:17,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:27:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:27:17,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:17,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:27:17,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612133355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:17,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:27:17,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-02 20:27:17,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917544408] [2022-11-02 20:27:17,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:17,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:27:17,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:17,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:27:17,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:27:17,518 INFO L87 Difference]: Start difference. First operand 975 states and 1596 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:27:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:17,865 INFO L93 Difference]: Finished difference Result 2392 states and 3944 transitions. [2022-11-02 20:27:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:27:17,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2022-11-02 20:27:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:17,874 INFO L225 Difference]: With dead ends: 2392 [2022-11-02 20:27:17,874 INFO L226 Difference]: Without dead ends: 1435 [2022-11-02 20:27:17,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:27:17,879 INFO L413 NwaCegarLoop]: 1001 mSDtfsCounter, 827 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:17,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [827 Valid, 1759 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:27:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-11-02 20:27:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1387. [2022-11-02 20:27:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1069 states have (on average 1.6585594013096352) internal successors, (1773), 1121 states have internal predecessors, (1773), 255 states have call successors, (255), 62 states have call predecessors, (255), 62 states have return successors, (262), 245 states have call predecessors, (262), 252 states have call successors, (262) [2022-11-02 20:27:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2290 transitions. [2022-11-02 20:27:18,178 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2290 transitions. Word has length 72 [2022-11-02 20:27:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:18,178 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 2290 transitions. [2022-11-02 20:27:18,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:27:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2290 transitions. [2022-11-02 20:27:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 20:27:18,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:18,180 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:18,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:18,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:27:18,408 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:27:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:18,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1235557642, now seen corresponding path program 1 times [2022-11-02 20:27:18,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:18,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561214915] [2022-11-02 20:27:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:18,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:18,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:18,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:18,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:27:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:18,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:18,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:18,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:27:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:18,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:27:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:18,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-02 20:27:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:27:18,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:18,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561214915] [2022-11-02 20:27:18,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561214915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:18,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:18,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:27:18,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122544009] [2022-11-02 20:27:18,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:18,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:27:18,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:18,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:27:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:27:18,905 INFO L87 Difference]: Start difference. First operand 1387 states and 2290 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 20:27:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:32,863 INFO L93 Difference]: Finished difference Result 5583 states and 9955 transitions. [2022-11-02 20:27:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:27:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2022-11-02 20:27:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:32,902 INFO L225 Difference]: With dead ends: 5583 [2022-11-02 20:27:32,903 INFO L226 Difference]: Without dead ends: 4214 [2022-11-02 20:27:32,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:27:32,911 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 3365 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 5402 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3496 SdHoareTripleChecker+Valid, 3151 SdHoareTripleChecker+Invalid, 6586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 5402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:32,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3496 Valid, 3151 Invalid, 6586 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1184 Valid, 5402 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-11-02 20:27:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2022-11-02 20:27:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 3335. [2022-11-02 20:27:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 2415 states have (on average 1.6236024844720496) internal successors, (3921), 2611 states have internal predecessors, (3921), 757 states have call successors, (757), 118 states have call predecessors, (757), 162 states have return successors, (1208), 755 states have call predecessors, (1208), 753 states have call successors, (1208) [2022-11-02 20:27:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 5886 transitions. [2022-11-02 20:27:33,940 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 5886 transitions. Word has length 74 [2022-11-02 20:27:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:33,940 INFO L495 AbstractCegarLoop]: Abstraction has 3335 states and 5886 transitions. [2022-11-02 20:27:33,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 20:27:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 5886 transitions. [2022-11-02 20:27:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-02 20:27:33,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:33,942 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] [2022-11-02 20:27:33,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:27:33,942 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:27:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:33,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1322679182, now seen corresponding path program 1 times [2022-11-02 20:27:33,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:33,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342942917] [2022-11-02 20:27:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:33,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:34,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:34,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:34,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:27:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:34,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:34,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:27:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:34,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:27:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:34,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:27:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:27:34,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:34,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342942917] [2022-11-02 20:27:34,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342942917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:34,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92916857] [2022-11-02 20:27:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:34,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:34,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:34,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:34,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:27:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:34,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:27:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:34,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:27:34,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92916857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:34,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:27:34,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-02 20:27:34,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603457087] [2022-11-02 20:27:34,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:34,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:27:34,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:34,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:27:34,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:27:34,886 INFO L87 Difference]: Start difference. First operand 3335 states and 5886 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 20:27:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:37,082 INFO L93 Difference]: Finished difference Result 9150 states and 16354 transitions. [2022-11-02 20:27:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:27:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 75 [2022-11-02 20:27:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:37,127 INFO L225 Difference]: With dead ends: 9150 [2022-11-02 20:27:37,128 INFO L226 Difference]: Without dead ends: 5833 [2022-11-02 20:27:37,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:27:37,150 INFO L413 NwaCegarLoop]: 981 mSDtfsCounter, 831 mSDsluCounter, 2729 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 3710 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:37,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 3710 Invalid, 301 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:27:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2022-11-02 20:27:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 5676. [2022-11-02 20:27:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5676 states, 4116 states have (on average 1.5777453838678328) internal successors, (6494), 4442 states have internal predecessors, (6494), 1264 states have call successors, (1264), 210 states have call predecessors, (1264), 295 states have return successors, (2119), 1273 states have call predecessors, (2119), 1258 states have call successors, (2119) [2022-11-02 20:27:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5676 states to 5676 states and 9877 transitions. [2022-11-02 20:27:38,740 INFO L78 Accepts]: Start accepts. Automaton has 5676 states and 9877 transitions. Word has length 75 [2022-11-02 20:27:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:38,740 INFO L495 AbstractCegarLoop]: Abstraction has 5676 states and 9877 transitions. [2022-11-02 20:27:38,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 20:27:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 5676 states and 9877 transitions. [2022-11-02 20:27:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-02 20:27:38,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:38,742 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] [2022-11-02 20:27:38,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:38,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4fe1a6-3e31-4bd6-af19-45be91247911/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:38,956 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:27:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:38,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1577052075, now seen corresponding path program 1 times [2022-11-02 20:27:38,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:38,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134866722] [2022-11-02 20:27:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:38,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:39,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:39,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:39,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:27:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:39,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:39,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:39,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:27:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:39,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:27:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:39,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:27:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:27:39,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:39,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134866722] [2022-11-02 20:27:39,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134866722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:39,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:39,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:27:39,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281005356] [2022-11-02 20:27:39,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:39,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:27:39,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:27:39,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:27:39,381 INFO L87 Difference]: Start difference. First operand 5676 states and 9877 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:27:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:46,909 INFO L93 Difference]: Finished difference Result 12560 states and 22336 transitions. [2022-11-02 20:27:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:27:46,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2022-11-02 20:27:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:46,959 INFO L225 Difference]: With dead ends: 12560 [2022-11-02 20:27:46,960 INFO L226 Difference]: Without dead ends: 6902 [2022-11-02 20:27:46,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:27:46,994 INFO L413 NwaCegarLoop]: 844 mSDtfsCounter, 1263 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:46,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1365 Valid, 1858 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-02 20:27:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6902 states. [2022-11-02 20:27:48,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6902 to 6116. [2022-11-02 20:27:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 4314 states have (on average 1.5693092257765415) internal successors, (6770), 4680 states have internal predecessors, (6770), 1496 states have call successors, (1496), 214 states have call predecessors, (1496), 305 states have return successors, (2538), 1511 states have call predecessors, (2538), 1490 states have call successors, (2538) [2022-11-02 20:27:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 10804 transitions. [2022-11-02 20:27:48,727 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 10804 transitions. Word has length 75 [2022-11-02 20:27:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:48,728 INFO L495 AbstractCegarLoop]: Abstraction has 6116 states and 10804 transitions. [2022-11-02 20:27:48,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:27:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 10804 transitions. [2022-11-02 20:27:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 20:27:48,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:48,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:48,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:27:48,730 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:27:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash 933412143, now seen corresponding path program 1 times [2022-11-02 20:27:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:48,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845450268] [2022-11-02 20:27:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:27:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:27:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:27:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:27:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:27:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:27:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:27:49,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845450268] [2022-11-02 20:27:49,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845450268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:49,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:49,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:27:49,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55576517] [2022-11-02 20:27:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:49,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:27:49,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:27:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:27:49,199 INFO L87 Difference]: Start difference. First operand 6116 states and 10804 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 20:28:07,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:07,216 INFO L93 Difference]: Finished difference Result 20586 states and 38915 transitions. [2022-11-02 20:28:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:28:07,216 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2022-11-02 20:28:07,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:07,315 INFO L225 Difference]: With dead ends: 20586 [2022-11-02 20:28:07,315 INFO L226 Difference]: Without dead ends: 14488 [2022-11-02 20:28:07,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:28:07,355 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 2338 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 5500 mSolverCounterSat, 796 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2468 SdHoareTripleChecker+Valid, 3046 SdHoareTripleChecker+Invalid, 6296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 5500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:07,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2468 Valid, 3046 Invalid, 6296 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [796 Valid, 5500 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-11-02 20:28:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14488 states. [2022-11-02 20:28:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14488 to 12320. [2022-11-02 20:28:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12320 states, 8650 states have (on average 1.564393063583815) internal successors, (13532), 9389 states have internal predecessors, (13532), 3054 states have call successors, (3054), 422 states have call predecessors, (3054), 615 states have return successors, (5872), 3103 states have call predecessors, (5872), 3044 states have call successors, (5872) [2022-11-02 20:28:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12320 states to 12320 states and 22458 transitions. [2022-11-02 20:28:11,032 INFO L78 Accepts]: Start accepts. Automaton has 12320 states and 22458 transitions. Word has length 83 [2022-11-02 20:28:11,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:11,032 INFO L495 AbstractCegarLoop]: Abstraction has 12320 states and 22458 transitions. [2022-11-02 20:28:11,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 20:28:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 12320 states and 22458 transitions. [2022-11-02 20:28:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:28:11,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:11,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:11,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:28:11,035 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:11,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:11,035 INFO L85 PathProgramCache]: Analyzing trace with hash -12224914, now seen corresponding path program 1 times [2022-11-02 20:28:11,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:11,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147452635] [2022-11-02 20:28:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:28:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:28:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:28:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:28:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:28:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:28:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 20:28:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:28:11,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:11,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147452635] [2022-11-02 20:28:11,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147452635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:11,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:11,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:28:11,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901210011] [2022-11-02 20:28:11,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:11,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:28:11,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:28:11,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:28:11,395 INFO L87 Difference]: Start difference. First operand 12320 states and 22458 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-02 20:28:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:20,749 INFO L93 Difference]: Finished difference Result 25974 states and 48367 transitions. [2022-11-02 20:28:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:28:20,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 84 [2022-11-02 20:28:20,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:20,841 INFO L225 Difference]: With dead ends: 25974 [2022-11-02 20:28:20,841 INFO L226 Difference]: Without dead ends: 13672 [2022-11-02 20:28:20,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:28:20,907 INFO L413 NwaCegarLoop]: 849 mSDtfsCounter, 750 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 2457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:20,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 1923 Invalid, 2457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-02 20:28:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13672 states. [2022-11-02 20:28:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13672 to 12360. [2022-11-02 20:28:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12360 states, 8686 states have (on average 1.5625143909739811) internal successors, (13572), 9417 states have internal predecessors, (13572), 3054 states have call successors, (3054), 438 states have call predecessors, (3054), 619 states have return successors, (5852), 3099 states have call predecessors, (5852), 3044 states have call successors, (5852) [2022-11-02 20:28:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12360 states to 12360 states and 22478 transitions. [2022-11-02 20:28:24,793 INFO L78 Accepts]: Start accepts. Automaton has 12360 states and 22478 transitions. Word has length 84 [2022-11-02 20:28:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:24,793 INFO L495 AbstractCegarLoop]: Abstraction has 12360 states and 22478 transitions. [2022-11-02 20:28:24,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-02 20:28:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 12360 states and 22478 transitions. [2022-11-02 20:28:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-02 20:28:24,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:24,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:24,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 20:28:24,796 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:24,797 INFO L85 PathProgramCache]: Analyzing trace with hash 126852297, now seen corresponding path program 1 times [2022-11-02 20:28:24,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:24,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659604914] [2022-11-02 20:28:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:24,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:28:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:28:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:28:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:28:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:28:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:28:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 20:28:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:28:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:28:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:25,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659604914] [2022-11-02 20:28:25,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659604914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:25,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:25,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:28:25,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370667849] [2022-11-02 20:28:25,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:25,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:28:25,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:25,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:28:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:28:25,263 INFO L87 Difference]: Start difference. First operand 12360 states and 22478 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-02 20:28:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:46,505 INFO L93 Difference]: Finished difference Result 41334 states and 83943 transitions. [2022-11-02 20:28:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:28:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 93 [2022-11-02 20:28:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:46,777 INFO L225 Difference]: With dead ends: 41334 [2022-11-02 20:28:46,778 INFO L226 Difference]: Without dead ends: 28992 [2022-11-02 20:28:46,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:28:46,882 INFO L413 NwaCegarLoop]: 962 mSDtfsCounter, 3350 mSDsluCounter, 1978 mSDsCounter, 0 mSdLazyCounter, 5309 mSolverCounterSat, 1176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3480 SdHoareTripleChecker+Valid, 2940 SdHoareTripleChecker+Invalid, 6485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1176 IncrementalHoareTripleChecker+Valid, 5309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:46,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3480 Valid, 2940 Invalid, 6485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1176 Valid, 5309 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-11-02 20:28:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28992 states. [2022-11-02 20:28:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28992 to 24802. [2022-11-02 20:28:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24802 states, 17427 states have (on average 1.558673323004533) internal successors, (27163), 18889 states have internal predecessors, (27163), 6121 states have call successors, (6121), 870 states have call predecessors, (6121), 1253 states have return successors, (13818), 6237 states have call predecessors, (13818), 6103 states have call successors, (13818) [2022-11-02 20:28:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24802 states to 24802 states and 47102 transitions. [2022-11-02 20:28:54,500 INFO L78 Accepts]: Start accepts. Automaton has 24802 states and 47102 transitions. Word has length 93 [2022-11-02 20:28:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:54,500 INFO L495 AbstractCegarLoop]: Abstraction has 24802 states and 47102 transitions. [2022-11-02 20:28:54,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-02 20:28:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 24802 states and 47102 transitions. [2022-11-02 20:28:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 20:28:54,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:54,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:54,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:28:54,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:54,504 INFO L85 PathProgramCache]: Analyzing trace with hash -58477476, now seen corresponding path program 1 times [2022-11-02 20:28:54,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:54,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300774217] [2022-11-02 20:28:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:54,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:28:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:28:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:28:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:28:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:28:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:28:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 20:28:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-02 20:28:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:28:54,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300774217] [2022-11-02 20:28:54,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300774217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:54,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:54,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:28:54,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445858846] [2022-11-02 20:28:54,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:54,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:28:54,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:54,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:28:54,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:28:54,873 INFO L87 Difference]: Start difference. First operand 24802 states and 47102 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-02 20:29:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:08,965 INFO L93 Difference]: Finished difference Result 52120 states and 103047 transitions. [2022-11-02 20:29:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:29:08,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 94 [2022-11-02 20:29:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:09,331 INFO L225 Difference]: With dead ends: 52120 [2022-11-02 20:29:09,332 INFO L226 Difference]: Without dead ends: 27336 [2022-11-02 20:29:09,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:29:09,477 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 752 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:09,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 1876 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-02 20:29:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27336 states.