./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product16.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU --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 14dde7567748bafe076b052fc50547f9c42c454af1c5c326a7b2a07549e9af32 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:17:07,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:17:07,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:17:07,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:17:07,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:17:07,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:17:07,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:17:07,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:17:07,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:17:07,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:17:07,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:17:07,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:17:07,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:17:07,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:17:07,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:17:07,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:17:07,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:17:07,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:17:07,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:17:07,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:17:07,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:17:07,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:17:07,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:17:07,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:17:07,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:17:07,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:17:07,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:17:07,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:17:07,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:17:07,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:17:08,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:17:08,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:17:08,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:17:08,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:17:08,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:17:08,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:17:08,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:17:08,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:17:08,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:17:08,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:17:08,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:17:08,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:17:08,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:17:08,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:17:08,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:17:08,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:17:08,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:17:08,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:17:08,069 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:17:08,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:17:08,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:17:08,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:17:08,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:17:08,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:17:08,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:17:08,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:17:08,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:17:08,072 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:17:08,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:17:08,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:17:08,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:17:08,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:17:08,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:17:08,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:17:08,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:17:08,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:17:08,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:17:08,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:17:08,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:17:08,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:17:08,075 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:17:08,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:17:08,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:17:08,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:17:08,092 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_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14dde7567748bafe076b052fc50547f9c42c454af1c5c326a7b2a07549e9af32 [2021-11-02 22:17:08,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:17:08,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:17:08,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:17:08,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:17:08,410 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:17:08,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/product-lines/email_spec6_product16.cil.c [2021-11-02 22:17:08,486 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/data/00af441e2/cc99aa72a5fe4cdc806f7198acdfedfc/FLAGe64d86168 [2021-11-02 22:17:09,225 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:17:09,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/sv-benchmarks/c/product-lines/email_spec6_product16.cil.c [2021-11-02 22:17:09,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/data/00af441e2/cc99aa72a5fe4cdc806f7198acdfedfc/FLAGe64d86168 [2021-11-02 22:17:09,418 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/data/00af441e2/cc99aa72a5fe4cdc806f7198acdfedfc [2021-11-02 22:17:09,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:17:09,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:17:09,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:17:09,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:17:09,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:17:09,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:17:09" (1/1) ... [2021-11-02 22:17:09,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@615f7cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:09, skipping insertion in model container [2021-11-02 22:17:09,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:17:09" (1/1) ... [2021-11-02 22:17:09,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:17:09,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:17:10,160 WARN L228 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_2a19740b-5aed-4e0c-ba09-699cb61195b4/sv-benchmarks/c/product-lines/email_spec6_product16.cil.c[39829,39842] [2021-11-02 22:17:10,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:17:10,325 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:17:10,446 WARN L228 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_2a19740b-5aed-4e0c-ba09-699cb61195b4/sv-benchmarks/c/product-lines/email_spec6_product16.cil.c[39829,39842] [2021-11-02 22:17:10,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:17:10,596 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:17:10,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10 WrapperNode [2021-11-02 22:17:10,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:17:10,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:17:10,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:17:10,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:17:10,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (1/1) ... [2021-11-02 22:17:10,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (1/1) ... [2021-11-02 22:17:10,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:17:10,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:17:10,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:17:10,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:17:10,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (1/1) ... [2021-11-02 22:17:10,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (1/1) ... [2021-11-02 22:17:10,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (1/1) ... [2021-11-02 22:17:10,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (1/1) ... [2021-11-02 22:17:10,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (1/1) ... [2021-11-02 22:17:10,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (1/1) ... [2021-11-02 22:17:11,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (1/1) ... [2021-11-02 22:17:11,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:17:11,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:17:11,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:17:11,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:17:11,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (1/1) ... [2021-11-02 22:17:11,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:17:11,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:11,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:17:11,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:17:11,136 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-02 22:17:11,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:17:11,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:17:11,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:17:11,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:17:13,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:17:13,766 INFO L299 CfgBuilder]: Removed 303 assume(true) statements. [2021-11-02 22:17:13,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:17:13 BoogieIcfgContainer [2021-11-02 22:17:13,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:17:13,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:17:13,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:17:13,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:17:13,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:17:09" (1/3) ... [2021-11-02 22:17:13,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b68e135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:17:13, skipping insertion in model container [2021-11-02 22:17:13,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:17:10" (2/3) ... [2021-11-02 22:17:13,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b68e135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:17:13, skipping insertion in model container [2021-11-02 22:17:13,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:17:13" (3/3) ... [2021-11-02 22:17:13,785 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product16.cil.c [2021-11-02 22:17:13,799 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:17:13,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 22:17:13,866 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:17:13,874 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:17:13,874 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 22:17:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 465 states, 462 states have (on average 1.7445887445887447) internal successors, (806), 464 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:17:13,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:13,927 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:13,927 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:13,935 INFO L85 PathProgramCache]: Analyzing trace with hash -286397701, now seen corresponding path program 1 times [2021-11-02 22:17:13,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:13,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448104568] [2021-11-02 22:17:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:13,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:14,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:14,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448104568] [2021-11-02 22:17:14,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448104568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:14,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:14,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:17:14,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644220132] [2021-11-02 22:17:14,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:17:14,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:14,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:17:14,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:14,509 INFO L87 Difference]: Start difference. First operand has 465 states, 462 states have (on average 1.7445887445887447) internal successors, (806), 464 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:14,723 INFO L93 Difference]: Finished difference Result 1360 states and 2360 transitions. [2021-11-02 22:17:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:17:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-02 22:17:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:14,749 INFO L225 Difference]: With dead ends: 1360 [2021-11-02 22:17:14,749 INFO L226 Difference]: Without dead ends: 792 [2021-11-02 22:17:14,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-11-02 22:17:14,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 405. [2021-11-02 22:17:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 403 states have (on average 1.739454094292804) internal successors, (701), 404 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 701 transitions. [2021-11-02 22:17:14,845 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 701 transitions. Word has length 50 [2021-11-02 22:17:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:14,845 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 701 transitions. [2021-11-02 22:17:14,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 701 transitions. [2021-11-02 22:17:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:17:14,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:14,852 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:14,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:17:14,852 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:14,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash -957785586, now seen corresponding path program 1 times [2021-11-02 22:17:14,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:14,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799768155] [2021-11-02 22:17:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:14,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:15,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:15,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799768155] [2021-11-02 22:17:15,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799768155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:15,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:15,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:17:15,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086294674] [2021-11-02 22:17:15,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:17:15,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:17:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:15,038 INFO L87 Difference]: Start difference. First operand 405 states and 701 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:15,248 INFO L93 Difference]: Finished difference Result 1164 states and 2019 transitions. [2021-11-02 22:17:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:17:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 22:17:15,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:15,256 INFO L225 Difference]: With dead ends: 1164 [2021-11-02 22:17:15,256 INFO L226 Difference]: Without dead ends: 778 [2021-11-02 22:17:15,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:17:15,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-11-02 22:17:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 405. [2021-11-02 22:17:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 403 states have (on average 1.7369727047146402) internal successors, (700), 404 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 700 transitions. [2021-11-02 22:17:15,292 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 700 transitions. Word has length 52 [2021-11-02 22:17:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:15,292 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 700 transitions. [2021-11-02 22:17:15,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 700 transitions. [2021-11-02 22:17:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:17:15,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:15,297 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:15,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:17:15,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2046040283, now seen corresponding path program 1 times [2021-11-02 22:17:15,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:15,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741069673] [2021-11-02 22:17:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:15,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:15,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:15,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741069673] [2021-11-02 22:17:15,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741069673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:15,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:15,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:17:15,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800075911] [2021-11-02 22:17:15,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:17:15,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:15,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:17:15,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:15,472 INFO L87 Difference]: Start difference. First operand 405 states and 700 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:15,532 INFO L93 Difference]: Finished difference Result 792 states and 1374 transitions. [2021-11-02 22:17:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:17:15,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 22:17:15,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:15,536 INFO L225 Difference]: With dead ends: 792 [2021-11-02 22:17:15,537 INFO L226 Difference]: Without dead ends: 410 [2021-11-02 22:17:15,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-02 22:17:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 405. [2021-11-02 22:17:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 403 states have (on average 1.7295285359801489) internal successors, (697), 404 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 697 transitions. [2021-11-02 22:17:15,560 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 697 transitions. Word has length 53 [2021-11-02 22:17:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:15,561 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 697 transitions. [2021-11-02 22:17:15,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:15,561 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 697 transitions. [2021-11-02 22:17:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:17:15,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:15,564 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:15,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:17:15,565 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1066492086, now seen corresponding path program 1 times [2021-11-02 22:17:15,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:15,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033191289] [2021-11-02 22:17:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:15,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:15,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:15,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033191289] [2021-11-02 22:17:15,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033191289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:15,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:15,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:17:15,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106873389] [2021-11-02 22:17:15,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:17:15,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:15,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:17:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:15,681 INFO L87 Difference]: Start difference. First operand 405 states and 697 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:15,888 INFO L93 Difference]: Finished difference Result 1154 states and 1999 transitions. [2021-11-02 22:17:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:17:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 22:17:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:15,897 INFO L225 Difference]: With dead ends: 1154 [2021-11-02 22:17:15,898 INFO L226 Difference]: Without dead ends: 776 [2021-11-02 22:17:15,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:17:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-11-02 22:17:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 405. [2021-11-02 22:17:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 403 states have (on average 1.7270471464019852) internal successors, (696), 404 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 696 transitions. [2021-11-02 22:17:15,937 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 696 transitions. Word has length 55 [2021-11-02 22:17:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:15,940 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 696 transitions. [2021-11-02 22:17:15,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:15,940 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 696 transitions. [2021-11-02 22:17:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:17:15,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:15,944 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:15,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:17:15,945 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash -754592295, now seen corresponding path program 1 times [2021-11-02 22:17:15,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:15,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222208190] [2021-11-02 22:17:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:15,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:16,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:16,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222208190] [2021-11-02 22:17:16,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222208190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:16,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:16,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:17:16,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811810578] [2021-11-02 22:17:16,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:17:16,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:17:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:16,117 INFO L87 Difference]: Start difference. First operand 405 states and 696 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:16,304 INFO L93 Difference]: Finished difference Result 1159 states and 2003 transitions. [2021-11-02 22:17:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:17:16,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 22:17:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:16,311 INFO L225 Difference]: With dead ends: 1159 [2021-11-02 22:17:16,312 INFO L226 Difference]: Without dead ends: 781 [2021-11-02 22:17:16,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:17:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-11-02 22:17:16,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 405. [2021-11-02 22:17:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 403 states have (on average 1.7245657568238213) internal successors, (695), 404 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 695 transitions. [2021-11-02 22:17:16,347 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 695 transitions. Word has length 56 [2021-11-02 22:17:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:16,349 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 695 transitions. [2021-11-02 22:17:16,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 695 transitions. [2021-11-02 22:17:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 22:17:16,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:16,351 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:16,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:17:16,352 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:16,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:16,353 INFO L85 PathProgramCache]: Analyzing trace with hash -212066575, now seen corresponding path program 1 times [2021-11-02 22:17:16,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:16,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923458941] [2021-11-02 22:17:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:16,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:16,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:16,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923458941] [2021-11-02 22:17:16,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923458941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:16,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:16,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:17:16,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140348393] [2021-11-02 22:17:16,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:17:16,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:17:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:16,475 INFO L87 Difference]: Start difference. First operand 405 states and 695 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:16,512 INFO L93 Difference]: Finished difference Result 572 states and 966 transitions. [2021-11-02 22:17:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:17:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-02 22:17:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:16,524 INFO L225 Difference]: With dead ends: 572 [2021-11-02 22:17:16,524 INFO L226 Difference]: Without dead ends: 408 [2021-11-02 22:17:16,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-02 22:17:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 407. [2021-11-02 22:17:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 405 states have (on average 1.7209876543209877) internal successors, (697), 406 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 697 transitions. [2021-11-02 22:17:16,554 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 697 transitions. Word has length 57 [2021-11-02 22:17:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:16,554 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 697 transitions. [2021-11-02 22:17:16,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 697 transitions. [2021-11-02 22:17:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:17:16,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:16,557 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:16,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:17:16,558 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:16,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:16,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1855965807, now seen corresponding path program 1 times [2021-11-02 22:17:16,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:16,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721923870] [2021-11-02 22:17:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:16,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:16,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:16,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721923870] [2021-11-02 22:17:16,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721923870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:16,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:16,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:17:16,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62163597] [2021-11-02 22:17:16,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:17:16,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:17:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:16,678 INFO L87 Difference]: Start difference. First operand 407 states and 697 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:16,737 INFO L93 Difference]: Finished difference Result 1107 states and 1915 transitions. [2021-11-02 22:17:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:17:16,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-02 22:17:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:16,743 INFO L225 Difference]: With dead ends: 1107 [2021-11-02 22:17:16,743 INFO L226 Difference]: Without dead ends: 731 [2021-11-02 22:17:16,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-11-02 22:17:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 567. [2021-11-02 22:17:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 565 states have (on average 1.752212389380531) internal successors, (990), 566 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 990 transitions. [2021-11-02 22:17:16,786 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 990 transitions. Word has length 63 [2021-11-02 22:17:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:16,787 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 990 transitions. [2021-11-02 22:17:16,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 990 transitions. [2021-11-02 22:17:16,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:17:16,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:16,789 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:16,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:17:16,790 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:16,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1730405966, now seen corresponding path program 1 times [2021-11-02 22:17:16,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:16,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635480655] [2021-11-02 22:17:16,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:16,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:16,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:16,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635480655] [2021-11-02 22:17:16,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635480655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:16,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433854655] [2021-11-02 22:17:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:16,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:16,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:16,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:16,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:17:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:17,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:17:17,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:17,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433854655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:17,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:17:17,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 22:17:17,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325317269] [2021-11-02 22:17:17,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:17:17,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:17:17,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:17,496 INFO L87 Difference]: Start difference. First operand 567 states and 990 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:17,609 INFO L93 Difference]: Finished difference Result 1111 states and 1918 transitions. [2021-11-02 22:17:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:17:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 22:17:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:17,618 INFO L225 Difference]: With dead ends: 1111 [2021-11-02 22:17:17,618 INFO L226 Difference]: Without dead ends: 947 [2021-11-02 22:17:17,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-02 22:17:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 781. [2021-11-02 22:17:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 779 states have (on average 1.7715019255455713) internal successors, (1380), 780 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1380 transitions. [2021-11-02 22:17:17,690 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1380 transitions. Word has length 64 [2021-11-02 22:17:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:17,690 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1380 transitions. [2021-11-02 22:17:17,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1380 transitions. [2021-11-02 22:17:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:17:17,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:17,694 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:17,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:17:17,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a19740b-5aed-4e0c-ba09-699cb61195b4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:17,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1416375201, now seen corresponding path program 1 times [2021-11-02 22:17:17,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:17,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806616686] [2021-11-02 22:17:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:17,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:18,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:18,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806616686] [2021-11-02 22:17:18,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806616686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:18,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:18,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:17:18,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258828597] [2021-11-02 22:17:18,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:17:18,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:17:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:18,012 INFO L87 Difference]: Start difference. First operand 781 states and 1380 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:18,137 INFO L93 Difference]: Finished difference Result 2009 states and 3564 transitions. [2021-11-02 22:17:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:17:18,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-02 22:17:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:18,148 INFO L225 Difference]: With dead ends: 2009 [2021-11-02 22:17:18,148 INFO L226 Difference]: Without dead ends: 1317 [2021-11-02 22:17:18,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-11-02 22:17:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1153. [2021-11-02 22:17:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1151 states have (on average 1.788010425716768) internal successors, (2058), 1152 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 2058 transitions. [2021-11-02 22:17:18,236 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 2058 transitions. Word has length 70 [2021-11-02 22:17:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:18,236 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 2058 transitions. [2021-11-02 22:17:18,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 2058 transitions. [2021-11-02 22:17:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:17:18,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:18,240 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:18,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:17:18,240 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:18,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1009486929, now seen corresponding path program 2 times [2021-11-02 22:17:18,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:18,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193685166] [2021-11-02 22:17:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:18,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:18,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:18,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193685166] [2021-11-02 22:17:18,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193685166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:18,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:18,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:17:18,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671916268] [2021-11-02 22:17:18,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:17:18,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:17:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:18,348 INFO L87 Difference]: Start difference. First operand 1153 states and 2058 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:18,491 INFO L93 Difference]: Finished difference Result 2223 states and 3952 transitions. [2021-11-02 22:17:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:17:18,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 22:17:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:18,502 INFO L225 Difference]: With dead ends: 2223 [2021-11-02 22:17:18,502 INFO L226 Difference]: Without dead ends: 1317 [2021-11-02 22:17:18,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:17:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-11-02 22:17:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1153. [2021-11-02 22:17:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1151 states have (on average 1.78627280625543) internal successors, (2056), 1152 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 2056 transitions. [2021-11-02 22:17:18,629 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 2056 transitions. Word has length 71 [2021-11-02 22:17:18,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:18,630 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 2056 transitions. [2021-11-02 22:17:18,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 2056 transitions. [2021-11-02 22:17:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:17:18,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:18,633 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:18,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:17:18,634 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:18,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:18,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1636893872, now seen corresponding path program 1 times [2021-11-02 22:17:18,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:18,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133046160] [2021-11-02 22:17:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:18,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:18,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:18,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133046160] [2021-11-02 22:17:18,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133046160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:18,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:18,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:17:18,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844229677] [2021-11-02 22:17:18,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:17:18,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:17:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:18,754 INFO L87 Difference]: Start difference. First operand 1153 states and 2056 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:18,911 INFO L93 Difference]: Finished difference Result 3097 states and 5547 transitions. [2021-11-02 22:17:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:17:18,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 22:17:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:18,928 INFO L225 Difference]: With dead ends: 3097 [2021-11-02 22:17:18,928 INFO L226 Difference]: Without dead ends: 2041 [2021-11-02 22:17:18,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-11-02 22:17:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1877. [2021-11-02 22:17:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1875 states have (on average 1.8) internal successors, (3375), 1876 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3375 transitions. [2021-11-02 22:17:19,084 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3375 transitions. Word has length 71 [2021-11-02 22:17:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:19,086 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 3375 transitions. [2021-11-02 22:17:19,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3375 transitions. [2021-11-02 22:17:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:17:19,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:19,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:19,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:17:19,092 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:19,092 INFO L85 PathProgramCache]: Analyzing trace with hash 121131235, now seen corresponding path program 1 times [2021-11-02 22:17:19,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:19,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338226731] [2021-11-02 22:17:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:19,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:19,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:19,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338226731] [2021-11-02 22:17:19,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338226731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:19,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:19,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:17:19,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727582265] [2021-11-02 22:17:19,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:17:19,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:17:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:19,172 INFO L87 Difference]: Start difference. First operand 1877 states and 3375 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:19,433 INFO L93 Difference]: Finished difference Result 5005 states and 9023 transitions. [2021-11-02 22:17:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:17:19,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-02 22:17:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:19,459 INFO L225 Difference]: With dead ends: 5005 [2021-11-02 22:17:19,459 INFO L226 Difference]: Without dead ends: 3259 [2021-11-02 22:17:19,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2021-11-02 22:17:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 3095. [2021-11-02 22:17:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 3093 states have (on average 1.806660200452635) internal successors, (5588), 3094 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 5588 transitions. [2021-11-02 22:17:19,730 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 5588 transitions. Word has length 72 [2021-11-02 22:17:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:19,731 INFO L470 AbstractCegarLoop]: Abstraction has 3095 states and 5588 transitions. [2021-11-02 22:17:19,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 5588 transitions. [2021-11-02 22:17:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 22:17:19,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:19,737 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:19,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:17:19,738 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash -231881599, now seen corresponding path program 1 times [2021-11-02 22:17:19,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:19,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124092731] [2021-11-02 22:17:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:19,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:19,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:19,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124092731] [2021-11-02 22:17:19,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124092731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:19,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:19,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:17:19,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184035794] [2021-11-02 22:17:19,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:17:19,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:19,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:17:19,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:19,827 INFO L87 Difference]: Start difference. First operand 3095 states and 5588 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:20,187 INFO L93 Difference]: Finished difference Result 8375 states and 15145 transitions. [2021-11-02 22:17:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:17:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-02 22:17:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:20,234 INFO L225 Difference]: With dead ends: 8375 [2021-11-02 22:17:20,234 INFO L226 Difference]: Without dead ends: 5445 [2021-11-02 22:17:20,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-11-02 22:17:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 5281. [2021-11-02 22:17:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 5279 states have (on average 1.808865315400644) internal successors, (9549), 5280 states have internal predecessors, (9549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 9549 transitions. [2021-11-02 22:17:20,740 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 9549 transitions. Word has length 73 [2021-11-02 22:17:20,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:20,741 INFO L470 AbstractCegarLoop]: Abstraction has 5281 states and 9549 transitions. [2021-11-02 22:17:20,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 9549 transitions. [2021-11-02 22:17:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 22:17:20,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:20,751 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:17:20,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:17:20,751 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash -702260571, now seen corresponding path program 1 times [2021-11-02 22:17:20,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:20,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954759612] [2021-11-02 22:17:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:20,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:17:20,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:20,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954759612] [2021-11-02 22:17:20,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954759612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:20,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:20,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:17:20,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277348733] [2021-11-02 22:17:20,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:17:20,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:20,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:17:20,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:20,847 INFO L87 Difference]: Start difference. First operand 5281 states and 9549 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:21,902 INFO L93 Difference]: Finished difference Result 15062 states and 27264 transitions. [2021-11-02 22:17:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:17:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-02 22:17:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:21,971 INFO L225 Difference]: With dead ends: 15062 [2021-11-02 22:17:21,971 INFO L226 Difference]: Without dead ends: 10028 [2021-11-02 22:17:21,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:17:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10028 states. [2021-11-02 22:17:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10028 to 5281. [2021-11-02 22:17:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 5279 states have (on average 1.7993938245879901) internal successors, (9499), 5280 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 9499 transitions. [2021-11-02 22:17:22,526 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 9499 transitions. Word has length 74 [2021-11-02 22:17:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:22,527 INFO L470 AbstractCegarLoop]: Abstraction has 5281 states and 9499 transitions. [2021-11-02 22:17:22,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 9499 transitions. [2021-11-02 22:17:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 22:17:22,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:22,536 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:22,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:17:22,537 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:22,537 INFO L85 PathProgramCache]: Analyzing trace with hash -774199596, now seen corresponding path program 1 times [2021-11-02 22:17:22,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:22,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145905294] [2021-11-02 22:17:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:22,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:22,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:22,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145905294] [2021-11-02 22:17:22,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145905294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:22,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:22,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:17:22,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168729417] [2021-11-02 22:17:22,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:17:22,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:22,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:17:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:22,615 INFO L87 Difference]: Start difference. First operand 5281 states and 9499 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:23,361 INFO L93 Difference]: Finished difference Result 15259 states and 27492 transitions. [2021-11-02 22:17:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:17:23,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-02 22:17:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:23,392 INFO L225 Difference]: With dead ends: 15259 [2021-11-02 22:17:23,393 INFO L226 Difference]: Without dead ends: 10151 [2021-11-02 22:17:23,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:17:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10151 states. [2021-11-02 22:17:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10151 to 9987. [2021-11-02 22:17:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9985 states have (on average 1.800701051577366) internal successors, (17980), 9986 states have internal predecessors, (17980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 17980 transitions. [2021-11-02 22:17:24,330 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 17980 transitions. Word has length 74 [2021-11-02 22:17:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:24,331 INFO L470 AbstractCegarLoop]: Abstraction has 9987 states and 17980 transitions. [2021-11-02 22:17:24,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 17980 transitions. [2021-11-02 22:17:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:17:24,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:24,346 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:17:24,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:17:24,347 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1091698400, now seen corresponding path program 1 times [2021-11-02 22:17:24,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:24,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876443063] [2021-11-02 22:17:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:24,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:17:24,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:24,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876443063] [2021-11-02 22:17:24,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876443063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:24,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:24,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:17:24,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093393241] [2021-11-02 22:17:24,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:17:24,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:24,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:17:24,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:17:24,500 INFO L87 Difference]: Start difference. First operand 9987 states and 17980 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:27,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:27,472 INFO L93 Difference]: Finished difference Result 20745 states and 37176 transitions. [2021-11-02 22:17:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:17:27,481 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-02 22:17:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:27,553 INFO L225 Difference]: With dead ends: 20745 [2021-11-02 22:17:27,553 INFO L226 Difference]: Without dead ends: 20601 [2021-11-02 22:17:27,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:17:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20601 states. [2021-11-02 22:17:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20601 to 19838. [2021-11-02 22:17:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19838 states, 19836 states have (on average 1.801623311151442) internal successors, (35737), 19837 states have internal predecessors, (35737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19838 states to 19838 states and 35737 transitions. [2021-11-02 22:17:29,111 INFO L78 Accepts]: Start accepts. Automaton has 19838 states and 35737 transitions. Word has length 75 [2021-11-02 22:17:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:29,112 INFO L470 AbstractCegarLoop]: Abstraction has 19838 states and 35737 transitions. [2021-11-02 22:17:29,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 19838 states and 35737 transitions. [2021-11-02 22:17:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:17:29,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:29,134 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:17:29,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:17:29,135 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:29,135 INFO L85 PathProgramCache]: Analyzing trace with hash 694822496, now seen corresponding path program 1 times [2021-11-02 22:17:29,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:29,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665709851] [2021-11-02 22:17:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:29,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:17:29,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:29,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665709851] [2021-11-02 22:17:29,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665709851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:29,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:29,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:17:29,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821542068] [2021-11-02 22:17:29,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:17:29,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:17:29,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:17:29,273 INFO L87 Difference]: Start difference. First operand 19838 states and 35737 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:30,714 INFO L93 Difference]: Finished difference Result 20180 states and 36291 transitions. [2021-11-02 22:17:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:17:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:17:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:30,780 INFO L225 Difference]: With dead ends: 20180 [2021-11-02 22:17:30,780 INFO L226 Difference]: Without dead ends: 19856 [2021-11-02 22:17:30,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:17:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19856 states. [2021-11-02 22:17:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19856 to 19820. [2021-11-02 22:17:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19820 states, 19818 states have (on average 1.8012412957917046) internal successors, (35697), 19819 states have internal predecessors, (35697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19820 states to 19820 states and 35697 transitions. [2021-11-02 22:17:32,219 INFO L78 Accepts]: Start accepts. Automaton has 19820 states and 35697 transitions. Word has length 76 [2021-11-02 22:17:32,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:32,220 INFO L470 AbstractCegarLoop]: Abstraction has 19820 states and 35697 transitions. [2021-11-02 22:17:32,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 19820 states and 35697 transitions. [2021-11-02 22:17:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:17:32,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:32,238 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:17:32,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:17:32,239 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash 841887020, now seen corresponding path program 1 times [2021-11-02 22:17:32,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:32,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435221199] [2021-11-02 22:17:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:32,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:17:32,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:32,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435221199] [2021-11-02 22:17:32,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435221199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:32,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:32,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:17:32,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277024844] [2021-11-02 22:17:32,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:17:32,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:32,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:17:32,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:17:32,330 INFO L87 Difference]: Start difference. First operand 19820 states and 35697 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:33,961 INFO L93 Difference]: Finished difference Result 30507 states and 54787 transitions. [2021-11-02 22:17:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:17:33,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:17:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:34,052 INFO L225 Difference]: With dead ends: 30507 [2021-11-02 22:17:34,052 INFO L226 Difference]: Without dead ends: 30265 [2021-11-02 22:17:34,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30265 states. [2021-11-02 22:17:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30265 to 29695. [2021-11-02 22:17:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29695 states, 29693 states have (on average 1.8010642238911527) internal successors, (53479), 29694 states have internal predecessors, (53479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29695 states to 29695 states and 53479 transitions. [2021-11-02 22:17:36,134 INFO L78 Accepts]: Start accepts. Automaton has 29695 states and 53479 transitions. Word has length 76 [2021-11-02 22:17:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:36,135 INFO L470 AbstractCegarLoop]: Abstraction has 29695 states and 53479 transitions. [2021-11-02 22:17:36,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 29695 states and 53479 transitions. [2021-11-02 22:17:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:17:36,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:36,162 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:17:36,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:17:36,163 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1060741738, now seen corresponding path program 1 times [2021-11-02 22:17:36,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:36,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240117122] [2021-11-02 22:17:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:36,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:17:36,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:36,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240117122] [2021-11-02 22:17:36,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240117122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:36,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:36,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:17:36,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473576274] [2021-11-02 22:17:36,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:17:36,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:17:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:36,280 INFO L87 Difference]: Start difference. First operand 29695 states and 53479 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:38,698 INFO L93 Difference]: Finished difference Result 32275 states and 57581 transitions. [2021-11-02 22:17:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:17:38,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:17:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:38,769 INFO L225 Difference]: With dead ends: 32275 [2021-11-02 22:17:38,769 INFO L226 Difference]: Without dead ends: 31872 [2021-11-02 22:17:38,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:17:38,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31872 states. [2021-11-02 22:17:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31872 to 30202. [2021-11-02 22:17:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30202 states, 30200 states have (on average 1.7975165562913906) internal successors, (54285), 30201 states have internal predecessors, (54285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30202 states to 30202 states and 54285 transitions. [2021-11-02 22:17:40,273 INFO L78 Accepts]: Start accepts. Automaton has 30202 states and 54285 transitions. Word has length 76 [2021-11-02 22:17:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:40,273 INFO L470 AbstractCegarLoop]: Abstraction has 30202 states and 54285 transitions. [2021-11-02 22:17:40,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 30202 states and 54285 transitions. [2021-11-02 22:17:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:17:40,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:40,297 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:17:40,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:17:40,297 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:40,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1377942618, now seen corresponding path program 1 times [2021-11-02 22:17:40,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:40,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337085949] [2021-11-02 22:17:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:40,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:17:40,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:40,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337085949] [2021-11-02 22:17:40,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337085949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:40,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:40,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:17:40,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438473147] [2021-11-02 22:17:40,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:17:40,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:17:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:17:40,438 INFO L87 Difference]: Start difference. First operand 30202 states and 54285 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:42,268 INFO L93 Difference]: Finished difference Result 31492 states and 56324 transitions. [2021-11-02 22:17:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:17:42,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 22:17:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:42,341 INFO L225 Difference]: With dead ends: 31492 [2021-11-02 22:17:42,341 INFO L226 Difference]: Without dead ends: 30606 [2021-11-02 22:17:42,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:17:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30606 states. [2021-11-02 22:17:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30606 to 30077. [2021-11-02 22:17:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30077 states, 30075 states have (on average 1.798004987531172) internal successors, (54075), 30076 states have internal predecessors, (54075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30077 states to 30077 states and 54075 transitions. [2021-11-02 22:17:43,879 INFO L78 Accepts]: Start accepts. Automaton has 30077 states and 54075 transitions. Word has length 77 [2021-11-02 22:17:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:43,879 INFO L470 AbstractCegarLoop]: Abstraction has 30077 states and 54075 transitions. [2021-11-02 22:17:43,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 30077 states and 54075 transitions. [2021-11-02 22:17:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:17:43,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:43,910 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:17:43,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:17:43,910 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:43,911 INFO L85 PathProgramCache]: Analyzing trace with hash -692252172, now seen corresponding path program 1 times [2021-11-02 22:17:43,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:43,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858759529] [2021-11-02 22:17:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:43,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:17:43,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:43,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858759529] [2021-11-02 22:17:43,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858759529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:43,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:43,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:17:43,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166849968] [2021-11-02 22:17:43,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:17:43,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:43,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:17:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:17:43,990 INFO L87 Difference]: Start difference. First operand 30077 states and 54075 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:45,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:45,521 INFO L93 Difference]: Finished difference Result 32103 states and 57255 transitions. [2021-11-02 22:17:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:17:45,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:17:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:45,580 INFO L225 Difference]: With dead ends: 32103 [2021-11-02 22:17:45,580 INFO L226 Difference]: Without dead ends: 31227 [2021-11-02 22:17:45,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31227 states. [2021-11-02 22:17:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31227 to 30091. [2021-11-02 22:17:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30091 states, 30089 states have (on average 1.7976336867293696) internal successors, (54089), 30090 states have internal predecessors, (54089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30091 states to 30091 states and 54089 transitions. [2021-11-02 22:17:47,127 INFO L78 Accepts]: Start accepts. Automaton has 30091 states and 54089 transitions. Word has length 79 [2021-11-02 22:17:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:47,128 INFO L470 AbstractCegarLoop]: Abstraction has 30091 states and 54089 transitions. [2021-11-02 22:17:47,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 30091 states and 54089 transitions. [2021-11-02 22:17:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:17:47,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:47,149 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:17:47,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 22:17:47,150 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash 328519829, now seen corresponding path program 1 times [2021-11-02 22:17:47,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:47,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329560030] [2021-11-02 22:17:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:47,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:17:47,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:47,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329560030] [2021-11-02 22:17:47,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329560030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:47,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:47,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:17:47,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140411707] [2021-11-02 22:17:47,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:17:47,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:47,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:17:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:47,221 INFO L87 Difference]: Start difference. First operand 30091 states and 54089 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:48,589 INFO L93 Difference]: Finished difference Result 31604 states and 56477 transitions. [2021-11-02 22:17:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:17:48,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:17:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:48,640 INFO L225 Difference]: With dead ends: 31604 [2021-11-02 22:17:48,640 INFO L226 Difference]: Without dead ends: 30679 [2021-11-02 22:17:48,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:17:48,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30679 states. [2021-11-02 22:17:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30679 to 30028. [2021-11-02 22:17:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30028 states, 30026 states have (on average 1.7977419569706254) internal successors, (53979), 30027 states have internal predecessors, (53979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30028 states to 30028 states and 53979 transitions. [2021-11-02 22:17:50,193 INFO L78 Accepts]: Start accepts. Automaton has 30028 states and 53979 transitions. Word has length 79 [2021-11-02 22:17:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:50,194 INFO L470 AbstractCegarLoop]: Abstraction has 30028 states and 53979 transitions. [2021-11-02 22:17:50,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 30028 states and 53979 transitions. [2021-11-02 22:17:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:17:50,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:50,207 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:17:50,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:17:50,208 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:50,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:50,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1631388914, now seen corresponding path program 1 times [2021-11-02 22:17:50,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:50,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237736238] [2021-11-02 22:17:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:50,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:17:50,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:50,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237736238] [2021-11-02 22:17:50,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237736238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:50,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:50,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:17:50,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139783902] [2021-11-02 22:17:50,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:17:50,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:50,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:17:50,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:17:50,284 INFO L87 Difference]: Start difference. First operand 30028 states and 53979 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:51,418 INFO L93 Difference]: Finished difference Result 30709 states and 55019 transitions. [2021-11-02 22:17:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:17:51,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:17:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:51,468 INFO L225 Difference]: With dead ends: 30709 [2021-11-02 22:17:51,468 INFO L226 Difference]: Without dead ends: 30009 [2021-11-02 22:17:51,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30009 states. [2021-11-02 22:17:52,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30009 to 29729. [2021-11-02 22:17:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29729 states, 29727 states have (on average 1.7997443401621422) internal successors, (53501), 29728 states have internal predecessors, (53501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29729 states to 29729 states and 53501 transitions. [2021-11-02 22:17:53,021 INFO L78 Accepts]: Start accepts. Automaton has 29729 states and 53501 transitions. Word has length 79 [2021-11-02 22:17:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:53,022 INFO L470 AbstractCegarLoop]: Abstraction has 29729 states and 53501 transitions. [2021-11-02 22:17:53,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 29729 states and 53501 transitions. [2021-11-02 22:17:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 22:17:53,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:53,056 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:17:53,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 22:17:53,056 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:53,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2107767355, now seen corresponding path program 1 times [2021-11-02 22:17:53,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:53,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200506956] [2021-11-02 22:17:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:53,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:17:53,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:53,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200506956] [2021-11-02 22:17:53,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200506956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:53,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:53,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:17:53,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599503452] [2021-11-02 22:17:53,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:17:53,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:53,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:17:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:53,165 INFO L87 Difference]: Start difference. First operand 29729 states and 53501 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:55,937 INFO L93 Difference]: Finished difference Result 84065 states and 150899 transitions. [2021-11-02 22:17:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:17:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-02 22:17:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:56,038 INFO L225 Difference]: With dead ends: 84065 [2021-11-02 22:17:56,039 INFO L226 Difference]: Without dead ends: 54704 [2021-11-02 22:17:56,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:17:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54704 states. [2021-11-02 22:17:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54704 to 29729. [2021-11-02 22:17:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29729 states, 29727 states have (on average 1.7964813132842197) internal successors, (53404), 29728 states have internal predecessors, (53404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29729 states to 29729 states and 53404 transitions. [2021-11-02 22:17:58,105 INFO L78 Accepts]: Start accepts. Automaton has 29729 states and 53404 transitions. Word has length 87 [2021-11-02 22:17:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:58,105 INFO L470 AbstractCegarLoop]: Abstraction has 29729 states and 53404 transitions. [2021-11-02 22:17:58,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 29729 states and 53404 transitions. [2021-11-02 22:17:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-02 22:17:58,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:58,137 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:58,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 22:17:58,138 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash -32890284, now seen corresponding path program 1 times [2021-11-02 22:17:58,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:58,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091898156] [2021-11-02 22:17:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:58,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:17:58,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:58,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091898156] [2021-11-02 22:17:58,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091898156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:17:58,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:17:58,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:17:58,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851366051] [2021-11-02 22:17:58,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:17:58,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:17:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:17:58,236 INFO L87 Difference]: Start difference. First operand 29729 states and 53404 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:18:03,877 INFO L93 Difference]: Finished difference Result 144169 states and 258448 transitions. [2021-11-02 22:18:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:18:03,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-02 22:18:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:18:04,315 INFO L225 Difference]: With dead ends: 144169 [2021-11-02 22:18:04,315 INFO L226 Difference]: Without dead ends: 114561 [2021-11-02 22:18:04,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:18:04,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114561 states. [2021-11-02 22:18:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114561 to 61438. [2021-11-02 22:18:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61438 states, 61436 states have (on average 1.76422618660069) internal successors, (108387), 61437 states have internal predecessors, (108387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61438 states to 61438 states and 108387 transitions. [2021-11-02 22:18:08,597 INFO L78 Accepts]: Start accepts. Automaton has 61438 states and 108387 transitions. Word has length 88 [2021-11-02 22:18:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:18:08,598 INFO L470 AbstractCegarLoop]: Abstraction has 61438 states and 108387 transitions. [2021-11-02 22:18:08,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 61438 states and 108387 transitions. [2021-11-02 22:18:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-02 22:18:08,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:18:08,663 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:18:08,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 22:18:08,664 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:18:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:18:08,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1828285849, now seen corresponding path program 1 times [2021-11-02 22:18:08,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:18:08,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038518619] [2021-11-02 22:18:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:18:08,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:18:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:18:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:18:08,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:18:08,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038518619] [2021-11-02 22:18:08,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038518619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:18:08,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:18:08,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:18:08,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798547193] [2021-11-02 22:18:08,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:18:08,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:18:08,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:18:08,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:18:08,734 INFO L87 Difference]: Start difference. First operand 61438 states and 108387 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)