./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0 --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 77340ea3311b00efe6580b7964ad9e7e4d288fea0ba2d6706c8abdac4c4c4bb5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:19:32,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:19:32,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:19:32,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:19:32,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:19:32,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:19:32,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:19:32,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:19:32,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:19:32,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:19:32,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:19:32,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:19:32,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:19:32,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:19:32,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:19:32,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:19:32,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:19:32,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:19:32,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:19:32,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:19:32,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:19:32,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:19:32,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:19:32,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:19:32,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:19:32,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:19:32,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:19:32,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:19:32,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:19:32,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:19:32,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:19:32,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:19:32,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:19:32,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:19:32,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:19:32,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:19:32,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:19:32,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:19:32,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:19:32,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:19:32,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:19:32,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:19:32,989 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:19:32,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:19:32,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:19:32,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:19:32,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:19:32,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:19:32,992 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:19:32,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:19:32,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:19:32,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:19:32,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:19:32,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:19:32,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:19:32,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:19:32,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:19:32,995 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:19:32,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:19:32,995 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:19:32,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:19:32,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:19:32,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:19:32,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:19:32,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:19:32,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:19:32,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:19:32,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:19:32,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:19:32,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:19:32,998 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:19:32,998 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:19:32,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:19:32,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:19:32,999 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_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77340ea3311b00efe6580b7964ad9e7e4d288fea0ba2d6706c8abdac4c4c4bb5 [2021-11-22 15:19:33,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:19:33,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:19:33,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:19:33,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:19:33,306 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:19:33,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c [2021-11-22 15:19:33,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/data/e056fa95d/1ce221a3488844a193fec6f71b7e9f1b/FLAG2295160b9 [2021-11-22 15:19:34,025 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:19:34,026 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c [2021-11-22 15:19:34,059 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/data/e056fa95d/1ce221a3488844a193fec6f71b7e9f1b/FLAG2295160b9 [2021-11-22 15:19:34,272 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/data/e056fa95d/1ce221a3488844a193fec6f71b7e9f1b [2021-11-22 15:19:34,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:19:34,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:19:34,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:19:34,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:19:34,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:19:34,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:19:34" (1/1) ... [2021-11-22 15:19:34,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61692b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:34, skipping insertion in model container [2021-11-22 15:19:34,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:19:34" (1/1) ... [2021-11-22 15:19:34,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:19:34,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:19:34,979 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c[47628,47641] [2021-11-22 15:19:35,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:19:35,059 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:19:35,128 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c[47628,47641] [2021-11-22 15:19:35,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:19:35,196 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:19:35,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35 WrapperNode [2021-11-22 15:19:35,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:19:35,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:19:35,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:19:35,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:19:35,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (1/1) ... [2021-11-22 15:19:35,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (1/1) ... [2021-11-22 15:19:35,355 INFO L137 Inliner]: procedures = 131, calls = 219, calls flagged for inlining = 130, calls inlined = 161, statements flattened = 2549 [2021-11-22 15:19:35,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:19:35,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:19:35,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:19:35,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:19:35,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (1/1) ... [2021-11-22 15:19:35,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (1/1) ... [2021-11-22 15:19:35,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (1/1) ... [2021-11-22 15:19:35,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (1/1) ... [2021-11-22 15:19:35,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (1/1) ... [2021-11-22 15:19:35,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (1/1) ... [2021-11-22 15:19:35,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (1/1) ... [2021-11-22 15:19:35,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:19:35,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:19:35,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:19:35,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:19:35,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (1/1) ... [2021-11-22 15:19:35,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:19:35,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:19:35,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:19:35,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:19:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-22 15:19:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:19:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:19:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:19:35,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:19:35,888 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:19:35,889 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:19:37,397 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:19:37,424 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:19:37,425 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 15:19:37,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:19:37 BoogieIcfgContainer [2021-11-22 15:19:37,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:19:37,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:19:37,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:19:37,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:19:37,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:19:34" (1/3) ... [2021-11-22 15:19:37,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5951631d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:19:37, skipping insertion in model container [2021-11-22 15:19:37,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:19:35" (2/3) ... [2021-11-22 15:19:37,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5951631d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:19:37, skipping insertion in model container [2021-11-22 15:19:37,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:19:37" (3/3) ... [2021-11-22 15:19:37,446 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product30.cil.c [2021-11-22 15:19:37,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:19:37,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 15:19:37,506 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:19:37,514 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 [2021-11-22 15:19:37,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 15:19:37,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 572 states, 569 states have (on average 1.6994727592267136) internal successors, (967), 571 states have internal predecessors, (967), 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) [2021-11-22 15:19:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 15:19:37,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:37,562 INFO L514 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] [2021-11-22 15:19:37,563 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1870141816, now seen corresponding path program 1 times [2021-11-22 15:19:37,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:37,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392701833] [2021-11-22 15:19:37,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:37,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:37,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:37,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392701833] [2021-11-22 15:19:37,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392701833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:37,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:37,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:37,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41288615] [2021-11-22 15:19:37,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:37,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:37,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:37,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:37,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:37,996 INFO L87 Difference]: Start difference. First operand has 572 states, 569 states have (on average 1.6994727592267136) internal successors, (967), 571 states have internal predecessors, (967), 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 23.0) internal successors, (69), 3 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) [2021-11-22 15:19:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:38,152 INFO L93 Difference]: Finished difference Result 1671 states and 2833 transitions. [2021-11-22 15:19:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:38,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 69 [2021-11-22 15:19:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:38,180 INFO L225 Difference]: With dead ends: 1671 [2021-11-22 15:19:38,180 INFO L226 Difference]: Without dead ends: 1059 [2021-11-22 15:19:38,187 INFO L932 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 [2021-11-22 15:19:38,194 INFO L933 BasicCegarLoop]: 1881 mSDtfsCounter, 936 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:38,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 2812 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-11-22 15:19:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 540. [2021-11-22 15:19:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.704460966542751) internal successors, (917), 539 states have internal predecessors, (917), 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) [2021-11-22 15:19:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 917 transitions. [2021-11-22 15:19:38,303 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 917 transitions. Word has length 69 [2021-11-22 15:19:38,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:38,304 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 917 transitions. [2021-11-22 15:19:38,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2021-11-22 15:19:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 917 transitions. [2021-11-22 15:19:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-22 15:19:38,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:38,311 INFO L514 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] [2021-11-22 15:19:38,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:19:38,311 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash 44024915, now seen corresponding path program 1 times [2021-11-22 15:19:38,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:38,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884696675] [2021-11-22 15:19:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:38,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:38,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884696675] [2021-11-22 15:19:38,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884696675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:38,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:38,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:19:38,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141973988] [2021-11-22 15:19:38,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:38,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:19:38,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:19:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:19:38,506 INFO L87 Difference]: Start difference. First operand 540 states and 917 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) [2021-11-22 15:19:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:38,698 INFO L93 Difference]: Finished difference Result 1561 states and 2659 transitions. [2021-11-22 15:19:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:19:38,700 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 [2021-11-22 15:19:38,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:38,707 INFO L225 Difference]: With dead ends: 1561 [2021-11-22 15:19:38,707 INFO L226 Difference]: Without dead ends: 1044 [2021-11-22 15:19:38,709 INFO L932 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 [2021-11-22 15:19:38,714 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 1788 mSDsluCounter, 2605 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1788 SdHoareTripleChecker+Valid, 4347 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:38,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1788 Valid, 4347 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:19:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-11-22 15:19:38,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 540. [2021-11-22 15:19:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.7026022304832713) internal successors, (916), 539 states have internal predecessors, (916), 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) [2021-11-22 15:19:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 916 transitions. [2021-11-22 15:19:38,800 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 916 transitions. Word has length 71 [2021-11-22 15:19:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:38,801 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 916 transitions. [2021-11-22 15:19:38,802 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) [2021-11-22 15:19:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 916 transitions. [2021-11-22 15:19:38,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-22 15:19:38,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:38,816 INFO L514 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] [2021-11-22 15:19:38,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:19:38,817 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:38,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:38,819 INFO L85 PathProgramCache]: Analyzing trace with hash -396604818, now seen corresponding path program 1 times [2021-11-22 15:19:38,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:38,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536317631] [2021-11-22 15:19:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:38,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:38,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:38,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536317631] [2021-11-22 15:19:38,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536317631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:38,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:38,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:38,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534006787] [2021-11-22 15:19:38,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:38,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:38,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:38,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:38,923 INFO L87 Difference]: Start difference. First operand 540 states and 916 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) [2021-11-22 15:19:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:38,975 INFO L93 Difference]: Finished difference Result 1059 states and 1803 transitions. [2021-11-22 15:19:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:38,976 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 [2021-11-22 15:19:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:38,980 INFO L225 Difference]: With dead ends: 1059 [2021-11-22 15:19:38,980 INFO L226 Difference]: Without dead ends: 547 [2021-11-22 15:19:38,981 INFO L932 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 [2021-11-22 15:19:38,983 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 889 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:38,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 942 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-22 15:19:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 540. [2021-11-22 15:19:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.6970260223048328) internal successors, (913), 539 states have internal predecessors, (913), 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) [2021-11-22 15:19:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 913 transitions. [2021-11-22 15:19:39,014 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 913 transitions. Word has length 72 [2021-11-22 15:19:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:39,015 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 913 transitions. [2021-11-22 15:19:39,015 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) [2021-11-22 15:19:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 913 transitions. [2021-11-22 15:19:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-22 15:19:39,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:39,018 INFO L514 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] [2021-11-22 15:19:39,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:19:39,019 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:39,021 INFO L85 PathProgramCache]: Analyzing trace with hash -689707991, now seen corresponding path program 1 times [2021-11-22 15:19:39,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:39,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254622688] [2021-11-22 15:19:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:39,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:39,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:39,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254622688] [2021-11-22 15:19:39,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254622688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:39,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:39,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:19:39,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111687605] [2021-11-22 15:19:39,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:39,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:19:39,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:39,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:19:39,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:19:39,171 INFO L87 Difference]: Start difference. First operand 540 states and 913 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2021-11-22 15:19:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:39,359 INFO L93 Difference]: Finished difference Result 1548 states and 2636 transitions. [2021-11-22 15:19:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:19:39,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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 [2021-11-22 15:19:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:39,367 INFO L225 Difference]: With dead ends: 1548 [2021-11-22 15:19:39,368 INFO L226 Difference]: Without dead ends: 1041 [2021-11-22 15:19:39,369 INFO L932 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 [2021-11-22 15:19:39,381 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 4316 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4316 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:39,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4316 Valid, 1807 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:19:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-11-22 15:19:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 540. [2021-11-22 15:19:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.695167286245353) internal successors, (912), 539 states have internal predecessors, (912), 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) [2021-11-22 15:19:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 912 transitions. [2021-11-22 15:19:39,422 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 912 transitions. Word has length 74 [2021-11-22 15:19:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:39,423 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 912 transitions. [2021-11-22 15:19:39,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2021-11-22 15:19:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 912 transitions. [2021-11-22 15:19:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 15:19:39,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:39,426 INFO L514 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, 1] [2021-11-22 15:19:39,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:19:39,426 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:39,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2715032, now seen corresponding path program 1 times [2021-11-22 15:19:39,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:39,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485799147] [2021-11-22 15:19:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:39,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:39,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:39,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485799147] [2021-11-22 15:19:39,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485799147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:39,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:39,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:19:39,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371165694] [2021-11-22 15:19:39,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:39,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:19:39,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:19:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:19:39,537 INFO L87 Difference]: Start difference. First operand 540 states and 912 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-11-22 15:19:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:39,720 INFO L93 Difference]: Finished difference Result 1555 states and 2642 transitions. [2021-11-22 15:19:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:19:39,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 [2021-11-22 15:19:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:39,727 INFO L225 Difference]: With dead ends: 1555 [2021-11-22 15:19:39,727 INFO L226 Difference]: Without dead ends: 1048 [2021-11-22 15:19:39,729 INFO L932 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 [2021-11-22 15:19:39,732 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 4320 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4320 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:39,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4320 Valid, 1810 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:19:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-11-22 15:19:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 540. [2021-11-22 15:19:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.6933085501858736) internal successors, (911), 539 states have internal predecessors, (911), 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) [2021-11-22 15:19:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 911 transitions. [2021-11-22 15:19:39,775 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 911 transitions. Word has length 75 [2021-11-22 15:19:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:39,775 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 911 transitions. [2021-11-22 15:19:39,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-11-22 15:19:39,776 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 911 transitions. [2021-11-22 15:19:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-22 15:19:39,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:39,780 INFO L514 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, 1, 1] [2021-11-22 15:19:39,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:19:39,781 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:39,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash -45804530, now seen corresponding path program 1 times [2021-11-22 15:19:39,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:39,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760375397] [2021-11-22 15:19:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:39,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:39,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760375397] [2021-11-22 15:19:39,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760375397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:39,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:39,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:39,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855246794] [2021-11-22 15:19:39,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:39,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:39,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:39,885 INFO L87 Difference]: Start difference. First operand 540 states and 911 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-11-22 15:19:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:39,927 INFO L93 Difference]: Finished difference Result 825 states and 1381 transitions. [2021-11-22 15:19:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:39,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 [2021-11-22 15:19:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:39,932 INFO L225 Difference]: With dead ends: 825 [2021-11-22 15:19:39,932 INFO L226 Difference]: Without dead ends: 543 [2021-11-22 15:19:39,933 INFO L932 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 [2021-11-22 15:19:39,934 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 1 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:39,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1816 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-22 15:19:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 542. [2021-11-22 15:19:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 540 states have (on average 1.6907407407407407) internal successors, (913), 541 states have internal predecessors, (913), 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) [2021-11-22 15:19:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 913 transitions. [2021-11-22 15:19:39,970 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 913 transitions. Word has length 76 [2021-11-22 15:19:39,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:39,970 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 913 transitions. [2021-11-22 15:19:39,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-11-22 15:19:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 913 transitions. [2021-11-22 15:19:39,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-22 15:19:39,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:39,973 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:39,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:19:39,973 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:39,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1787243049, now seen corresponding path program 1 times [2021-11-22 15:19:39,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:39,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160859501] [2021-11-22 15:19:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:39,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:40,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:40,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160859501] [2021-11-22 15:19:40,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160859501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:40,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:40,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:40,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847730289] [2021-11-22 15:19:40,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:40,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:40,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:40,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:40,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:40,030 INFO L87 Difference]: Start difference. First operand 542 states and 913 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-22 15:19:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:40,102 INFO L93 Difference]: Finished difference Result 1498 states and 2549 transitions. [2021-11-22 15:19:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-22 15:19:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:40,110 INFO L225 Difference]: With dead ends: 1498 [2021-11-22 15:19:40,110 INFO L226 Difference]: Without dead ends: 994 [2021-11-22 15:19:40,111 INFO L932 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 [2021-11-22 15:19:40,112 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 861 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:40,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1722 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-11-22 15:19:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 712. [2021-11-22 15:19:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 710 states have (on average 1.712676056338028) internal successors, (1216), 711 states have internal predecessors, (1216), 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) [2021-11-22 15:19:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1216 transitions. [2021-11-22 15:19:40,165 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1216 transitions. Word has length 85 [2021-11-22 15:19:40,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:40,165 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 1216 transitions. [2021-11-22 15:19:40,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-22 15:19:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1216 transitions. [2021-11-22 15:19:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-22 15:19:40,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:40,168 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:40,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:19:40,168 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:40,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1405584229, now seen corresponding path program 1 times [2021-11-22 15:19:40,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:40,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262160496] [2021-11-22 15:19:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:40,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:40,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:40,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262160496] [2021-11-22 15:19:40,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262160496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:40,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:40,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:19:40,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505529564] [2021-11-22 15:19:40,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:40,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:19:40,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:19:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:19:40,237 INFO L87 Difference]: Start difference. First operand 712 states and 1216 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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) [2021-11-22 15:19:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:40,438 INFO L93 Difference]: Finished difference Result 2050 states and 3538 transitions. [2021-11-22 15:19:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:19:40,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2021-11-22 15:19:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:40,448 INFO L225 Difference]: With dead ends: 2050 [2021-11-22 15:19:40,448 INFO L226 Difference]: Without dead ends: 1376 [2021-11-22 15:19:40,450 INFO L932 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 [2021-11-22 15:19:40,451 INFO L933 BasicCegarLoop]: 1747 mSDtfsCounter, 1757 mSDsluCounter, 2620 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1757 SdHoareTripleChecker+Valid, 4367 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:40,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1757 Valid, 4367 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:19:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-11-22 15:19:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 712. [2021-11-22 15:19:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 710 states have (on average 1.7098591549295774) internal successors, (1214), 711 states have internal predecessors, (1214), 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) [2021-11-22 15:19:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1214 transitions. [2021-11-22 15:19:40,515 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1214 transitions. Word has length 86 [2021-11-22 15:19:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:40,516 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 1214 transitions. [2021-11-22 15:19:40,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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) [2021-11-22 15:19:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1214 transitions. [2021-11-22 15:19:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 15:19:40,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:40,518 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:40,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 15:19:40,520 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1675092740, now seen corresponding path program 1 times [2021-11-22 15:19:40,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:40,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782767652] [2021-11-22 15:19:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:40,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:40,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:40,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782767652] [2021-11-22 15:19:40,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782767652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:40,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:40,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:40,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977889577] [2021-11-22 15:19:40,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:40,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:40,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:40,590 INFO L87 Difference]: Start difference. First operand 712 states and 1214 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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) [2021-11-22 15:19:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:40,702 INFO L93 Difference]: Finished difference Result 2048 states and 3530 transitions. [2021-11-22 15:19:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:40,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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 87 [2021-11-22 15:19:40,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:40,712 INFO L225 Difference]: With dead ends: 2048 [2021-11-22 15:19:40,712 INFO L226 Difference]: Without dead ends: 1374 [2021-11-22 15:19:40,716 INFO L932 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 [2021-11-22 15:19:40,718 INFO L933 BasicCegarLoop]: 1376 mSDtfsCounter, 858 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 2274 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:40,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 2274 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-11-22 15:19:40,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1092. [2021-11-22 15:19:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1090 states have (on average 1.738532110091743) internal successors, (1895), 1091 states have internal predecessors, (1895), 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) [2021-11-22 15:19:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1895 transitions. [2021-11-22 15:19:40,838 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1895 transitions. Word has length 87 [2021-11-22 15:19:40,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:40,838 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1895 transitions. [2021-11-22 15:19:40,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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) [2021-11-22 15:19:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1895 transitions. [2021-11-22 15:19:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 15:19:40,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:40,842 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:40,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 15:19:40,843 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash -688459147, now seen corresponding path program 1 times [2021-11-22 15:19:40,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:40,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277987756] [2021-11-22 15:19:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:40,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:40,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:40,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277987756] [2021-11-22 15:19:40,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277987756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:19:40,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21649993] [2021-11-22 15:19:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:40,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:19:40,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:19:40,927 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:19:40,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:19:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:41,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:19:41,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:19:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:41,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:19:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:41,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21649993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:19:41,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:19:41,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 15:19:41,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232955737] [2021-11-22 15:19:41,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:19:41,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:19:41,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:41,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:19:41,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:19:41,643 INFO L87 Difference]: Start difference. First operand 1092 states and 1895 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2021-11-22 15:19:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:42,006 INFO L93 Difference]: Finished difference Result 3828 states and 6635 transitions. [2021-11-22 15:19:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:19:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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 [2021-11-22 15:19:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:42,029 INFO L225 Difference]: With dead ends: 3828 [2021-11-22 15:19:42,030 INFO L226 Difference]: Without dead ends: 3546 [2021-11-22 15:19:42,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:19:42,032 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 2577 mSDsluCounter, 3578 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2577 SdHoareTripleChecker+Valid, 4486 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:42,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2577 Valid, 4486 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-11-22 15:19:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2700. [2021-11-22 15:19:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2698 states have (on average 1.7642698295033359) internal successors, (4760), 2699 states have internal predecessors, (4760), 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) [2021-11-22 15:19:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 4760 transitions. [2021-11-22 15:19:42,245 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 4760 transitions. Word has length 87 [2021-11-22 15:19:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:42,246 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 4760 transitions. [2021-11-22 15:19:42,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 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) [2021-11-22 15:19:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 4760 transitions. [2021-11-22 15:19:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-22 15:19:42,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:42,253 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:42,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:19:42,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00872d7-e2b6-4b11-ab59-ab2a2e4368ea/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:19:42,475 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:42,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1331430407, now seen corresponding path program 1 times [2021-11-22 15:19:42,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:42,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770238247] [2021-11-22 15:19:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:42,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:42,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:42,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770238247] [2021-11-22 15:19:42,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770238247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:42,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:42,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:42,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270617741] [2021-11-22 15:19:42,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:42,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:42,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:42,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:42,541 INFO L87 Difference]: Start difference. First operand 2700 states and 4760 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-11-22 15:19:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:42,875 INFO L93 Difference]: Finished difference Result 7044 states and 12450 transitions. [2021-11-22 15:19:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 90 [2021-11-22 15:19:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:42,905 INFO L225 Difference]: With dead ends: 7044 [2021-11-22 15:19:42,906 INFO L226 Difference]: Without dead ends: 4544 [2021-11-22 15:19:42,910 INFO L932 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 [2021-11-22 15:19:42,911 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 856 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:42,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 1807 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4544 states. [2021-11-22 15:19:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4544 to 4262. [2021-11-22 15:19:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4262 states, 4260 states have (on average 1.769718309859155) internal successors, (7539), 4261 states have internal predecessors, (7539), 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) [2021-11-22 15:19:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 7539 transitions. [2021-11-22 15:19:43,273 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 7539 transitions. Word has length 90 [2021-11-22 15:19:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:43,273 INFO L470 AbstractCegarLoop]: Abstraction has 4262 states and 7539 transitions. [2021-11-22 15:19:43,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-11-22 15:19:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 7539 transitions. [2021-11-22 15:19:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-22 15:19:43,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:43,284 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:43,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 15:19:43,284 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:43,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:43,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1373990549, now seen corresponding path program 1 times [2021-11-22 15:19:43,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:43,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206182123] [2021-11-22 15:19:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:43,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:43,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:43,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206182123] [2021-11-22 15:19:43,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206182123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:43,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:43,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:43,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133922600] [2021-11-22 15:19:43,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:43,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:43,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:43,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:43,370 INFO L87 Difference]: Start difference. First operand 4262 states and 7539 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2021-11-22 15:19:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:43,855 INFO L93 Difference]: Finished difference Result 10403 states and 18409 transitions. [2021-11-22 15:19:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:43,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 91 [2021-11-22 15:19:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:43,922 INFO L225 Difference]: With dead ends: 10403 [2021-11-22 15:19:43,923 INFO L226 Difference]: Without dead ends: 6708 [2021-11-22 15:19:43,930 INFO L932 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 [2021-11-22 15:19:43,931 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 854 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:43,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 1758 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6708 states. [2021-11-22 15:19:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6708 to 6426. [2021-11-22 15:19:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6426 states, 6424 states have (on average 1.7686799501867996) internal successors, (11362), 6425 states have internal predecessors, (11362), 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) [2021-11-22 15:19:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6426 states to 6426 states and 11362 transitions. [2021-11-22 15:19:44,416 INFO L78 Accepts]: Start accepts. Automaton has 6426 states and 11362 transitions. Word has length 91 [2021-11-22 15:19:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:44,417 INFO L470 AbstractCegarLoop]: Abstraction has 6426 states and 11362 transitions. [2021-11-22 15:19:44,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2021-11-22 15:19:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6426 states and 11362 transitions. [2021-11-22 15:19:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-22 15:19:44,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:44,433 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:44,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:19:44,434 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1992319175, now seen corresponding path program 1 times [2021-11-22 15:19:44,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:44,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354677979] [2021-11-22 15:19:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:44,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:44,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:44,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354677979] [2021-11-22 15:19:44,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354677979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:44,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:44,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:44,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960272625] [2021-11-22 15:19:44,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:44,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:44,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:44,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:44,499 INFO L87 Difference]: Start difference. First operand 6426 states and 11362 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2021-11-22 15:19:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:45,050 INFO L93 Difference]: Finished difference Result 15316 states and 27082 transitions. [2021-11-22 15:19:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 92 [2021-11-22 15:19:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:45,082 INFO L225 Difference]: With dead ends: 15316 [2021-11-22 15:19:45,083 INFO L226 Difference]: Without dead ends: 10046 [2021-11-22 15:19:45,093 INFO L932 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 [2021-11-22 15:19:45,094 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 852 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:45,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 1758 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2021-11-22 15:19:45,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9764. [2021-11-22 15:19:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9764 states, 9762 states have (on average 1.7658266748617086) internal successors, (17238), 9763 states have internal predecessors, (17238), 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) [2021-11-22 15:19:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9764 states to 9764 states and 17238 transitions. [2021-11-22 15:19:45,916 INFO L78 Accepts]: Start accepts. Automaton has 9764 states and 17238 transitions. Word has length 92 [2021-11-22 15:19:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:45,916 INFO L470 AbstractCegarLoop]: Abstraction has 9764 states and 17238 transitions. [2021-11-22 15:19:45,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2021-11-22 15:19:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 9764 states and 17238 transitions. [2021-11-22 15:19:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-22 15:19:45,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:45,941 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:45,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 15:19:45,941 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash -716620251, now seen corresponding path program 1 times [2021-11-22 15:19:45,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:45,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314367564] [2021-11-22 15:19:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:45,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:46,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:46,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314367564] [2021-11-22 15:19:46,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314367564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:46,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:46,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:46,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975204745] [2021-11-22 15:19:46,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:46,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:46,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:46,022 INFO L87 Difference]: Start difference. First operand 9764 states and 17238 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2021-11-22 15:19:47,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:47,064 INFO L93 Difference]: Finished difference Result 24661 states and 43590 transitions. [2021-11-22 15:19:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:47,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 93 [2021-11-22 15:19:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:47,118 INFO L225 Difference]: With dead ends: 24661 [2021-11-22 15:19:47,118 INFO L226 Difference]: Without dead ends: 16521 [2021-11-22 15:19:47,133 INFO L932 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 [2021-11-22 15:19:47,134 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 850 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:47,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1814 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16521 states. [2021-11-22 15:19:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16521 to 16239. [2021-11-22 15:19:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16239 states, 16237 states have (on average 1.7647348648149288) internal successors, (28654), 16238 states have internal predecessors, (28654), 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) [2021-11-22 15:19:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16239 states to 16239 states and 28654 transitions. [2021-11-22 15:19:48,209 INFO L78 Accepts]: Start accepts. Automaton has 16239 states and 28654 transitions. Word has length 93 [2021-11-22 15:19:48,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:48,209 INFO L470 AbstractCegarLoop]: Abstraction has 16239 states and 28654 transitions. [2021-11-22 15:19:48,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2021-11-22 15:19:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 16239 states and 28654 transitions. [2021-11-22 15:19:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-22 15:19:48,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:48,237 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:48,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 15:19:48,238 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:48,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1227497385, now seen corresponding path program 1 times [2021-11-22 15:19:48,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:48,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102720382] [2021-11-22 15:19:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:48,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:48,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:48,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102720382] [2021-11-22 15:19:48,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102720382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:48,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:48,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:48,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221376312] [2021-11-22 15:19:48,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:48,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:48,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:48,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:48,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:48,287 INFO L87 Difference]: Start difference. First operand 16239 states and 28654 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-11-22 15:19:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:49,480 INFO L93 Difference]: Finished difference Result 41513 states and 73490 transitions. [2021-11-22 15:19:49,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:49,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 94 [2021-11-22 15:19:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:49,570 INFO L225 Difference]: With dead ends: 41513 [2021-11-22 15:19:49,570 INFO L226 Difference]: Without dead ends: 27788 [2021-11-22 15:19:49,594 INFO L932 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 [2021-11-22 15:19:49,595 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 848 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:49,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 1805 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27788 states. [2021-11-22 15:19:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27788 to 27506. [2021-11-22 15:19:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27506 states, 27504 states have (on average 1.7673429319371727) internal successors, (48609), 27505 states have internal predecessors, (48609), 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) [2021-11-22 15:19:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27506 states to 27506 states and 48609 transitions. [2021-11-22 15:19:51,053 INFO L78 Accepts]: Start accepts. Automaton has 27506 states and 48609 transitions. Word has length 94 [2021-11-22 15:19:51,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:51,053 INFO L470 AbstractCegarLoop]: Abstraction has 27506 states and 48609 transitions. [2021-11-22 15:19:51,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-11-22 15:19:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 27506 states and 48609 transitions. [2021-11-22 15:19:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-22 15:19:51,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:51,256 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:51,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 15:19:51,256 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:51,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash 773189639, now seen corresponding path program 1 times [2021-11-22 15:19:51,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:51,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377875696] [2021-11-22 15:19:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:51,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:51,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:51,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377875696] [2021-11-22 15:19:51,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377875696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:51,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:51,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:51,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857744563] [2021-11-22 15:19:51,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:51,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:51,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:51,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:51,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:51,310 INFO L87 Difference]: Start difference. First operand 27506 states and 48609 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-11-22 15:19:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:53,075 INFO L93 Difference]: Finished difference Result 73343 states and 129820 transitions. [2021-11-22 15:19:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 95 [2021-11-22 15:19:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:53,200 INFO L225 Difference]: With dead ends: 73343 [2021-11-22 15:19:53,201 INFO L226 Difference]: Without dead ends: 49283 [2021-11-22 15:19:53,239 INFO L932 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 [2021-11-22 15:19:53,239 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 846 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:53,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 1814 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49283 states. [2021-11-22 15:19:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49283 to 49001. [2021-11-22 15:19:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49001 states, 48999 states have (on average 1.7656890956958304) internal successors, (86517), 49000 states have internal predecessors, (86517), 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) [2021-11-22 15:19:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49001 states to 49001 states and 86517 transitions. [2021-11-22 15:19:55,588 INFO L78 Accepts]: Start accepts. Automaton has 49001 states and 86517 transitions. Word has length 95 [2021-11-22 15:19:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:19:55,588 INFO L470 AbstractCegarLoop]: Abstraction has 49001 states and 86517 transitions. [2021-11-22 15:19:55,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-11-22 15:19:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 49001 states and 86517 transitions. [2021-11-22 15:19:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-22 15:19:55,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:19:55,661 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:19:55,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 15:19:55,661 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:19:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:19:55,662 INFO L85 PathProgramCache]: Analyzing trace with hash 216019421, now seen corresponding path program 1 times [2021-11-22 15:19:55,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:19:55,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783118688] [2021-11-22 15:19:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:19:55,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:19:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:19:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:19:55,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:19:55,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783118688] [2021-11-22 15:19:55,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783118688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:19:55,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:19:55,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:19:55,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695886080] [2021-11-22 15:19:55,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:19:55,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:19:55,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:19:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:19:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:19:55,717 INFO L87 Difference]: Start difference. First operand 49001 states and 86517 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-11-22 15:19:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:19:58,885 INFO L93 Difference]: Finished difference Result 125476 states and 221458 transitions. [2021-11-22 15:19:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:19:58,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2021-11-22 15:19:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:19:59,080 INFO L225 Difference]: With dead ends: 125476 [2021-11-22 15:19:59,081 INFO L226 Difference]: Without dead ends: 82224 [2021-11-22 15:19:59,159 INFO L932 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 [2021-11-22 15:19:59,161 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 844 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:19:59,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 1758 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:19:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82224 states. [2021-11-22 15:20:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82224 to 81942. [2021-11-22 15:20:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81942 states, 81940 states have (on average 1.7592628752745911) internal successors, (144154), 81941 states have internal predecessors, (144154), 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) [2021-11-22 15:20:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81942 states to 81942 states and 144154 transitions. [2021-11-22 15:20:03,044 INFO L78 Accepts]: Start accepts. Automaton has 81942 states and 144154 transitions. Word has length 96 [2021-11-22 15:20:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:20:03,045 INFO L470 AbstractCegarLoop]: Abstraction has 81942 states and 144154 transitions. [2021-11-22 15:20:03,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-11-22 15:20:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 81942 states and 144154 transitions. [2021-11-22 15:20:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-22 15:20:03,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:20:03,087 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:20:03,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 15:20:03,087 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:20:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:20:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash -542925655, now seen corresponding path program 1 times [2021-11-22 15:20:03,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:20:03,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569894952] [2021-11-22 15:20:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:20:03,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:20:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:20:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:20:03,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:20:03,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569894952] [2021-11-22 15:20:03,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569894952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:20:03,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:20:03,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:20:03,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038449138] [2021-11-22 15:20:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:20:03,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:20:03,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:20:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:20:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:20:03,147 INFO L87 Difference]: Start difference. First operand 81942 states and 144154 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-22 15:20:08,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:20:08,805 INFO L93 Difference]: Finished difference Result 225893 states and 398565 transitions. [2021-11-22 15:20:08,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:20:08,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-11-22 15:20:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:20:09,141 INFO L225 Difference]: With dead ends: 225893 [2021-11-22 15:20:09,142 INFO L226 Difference]: Without dead ends: 151328 [2021-11-22 15:20:09,216 INFO L932 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 [2021-11-22 15:20:09,217 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 842 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:20:09,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 1805 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:20:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151328 states. [2021-11-22 15:20:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151328 to 151046. [2021-11-22 15:20:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151046 states, 151044 states have (on average 1.7615264426259898) internal successors, (266068), 151045 states have internal predecessors, (266068), 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) [2021-11-22 15:20:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151046 states to 151046 states and 266068 transitions. [2021-11-22 15:20:16,512 INFO L78 Accepts]: Start accepts. Automaton has 151046 states and 266068 transitions. Word has length 97 [2021-11-22 15:20:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:20:16,512 INFO L470 AbstractCegarLoop]: Abstraction has 151046 states and 266068 transitions. [2021-11-22 15:20:16,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-22 15:20:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 151046 states and 266068 transitions. [2021-11-22 15:20:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-22 15:20:16,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:20:16,550 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:20:16,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 15:20:16,550 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:20:16,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:20:16,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1395336781, now seen corresponding path program 1 times [2021-11-22 15:20:16,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:20:16,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842443742] [2021-11-22 15:20:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:20:16,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:20:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:20:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:20:16,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:20:16,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842443742] [2021-11-22 15:20:16,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842443742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:20:16,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:20:16,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:20:16,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295870343] [2021-11-22 15:20:16,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:20:16,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:20:16,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:20:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:20:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:20:16,632 INFO L87 Difference]: Start difference. First operand 151046 states and 266068 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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)