./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/locks/test_locks_11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be --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 dd9c6b82321d3b192dc5809ecc7ca6021855509a18ab1d23ca9eeb538976a0c0 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:13:48,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:13:48,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:13:48,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:13:48,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:13:48,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:13:48,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:13:48,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:13:48,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:13:48,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:13:48,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:13:48,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:13:48,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:13:48,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:13:48,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:13:48,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:13:48,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:13:48,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:13:48,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:13:48,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:13:48,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:13:48,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:13:48,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:13:48,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:13:48,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:13:48,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:13:48,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:13:48,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:13:48,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:13:48,858 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:13:48,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:13:48,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:13:48,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:13:48,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:13:48,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:13:48,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:13:48,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:13:48,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:13:48,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:13:48,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:13:48,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:13:48,870 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:13:48,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:13:48,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:13:48,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:13:48,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:13:48,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:13:48,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:13:48,901 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:13:48,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:13:48,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:13:48,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:13:48,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:13:48,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:13:48,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:13:48,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:13:48,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:13:48,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:13:48,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:13:48,904 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:13:48,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:13:48,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:13:48,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:13:48,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:13:48,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:13:48,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:13:48,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:13:48,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:13:48,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:13:48,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:13:48,906 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:13:48,907 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:13:48,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:13:48,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:13:48,907 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_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd9c6b82321d3b192dc5809ecc7ca6021855509a18ab1d23ca9eeb538976a0c0 [2021-10-21 19:13:49,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:13:49,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:13:49,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:13:49,278 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:13:49,279 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:13:49,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/locks/test_locks_11.c [2021-10-21 19:13:49,356 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/data/b162b691f/0244927c76d34eb09f263f146af1b878/FLAG90d432adf [2021-10-21 19:13:49,868 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:13:49,873 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/sv-benchmarks/c/locks/test_locks_11.c [2021-10-21 19:13:49,891 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/data/b162b691f/0244927c76d34eb09f263f146af1b878/FLAG90d432adf [2021-10-21 19:13:50,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/data/b162b691f/0244927c76d34eb09f263f146af1b878 [2021-10-21 19:13:50,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:13:50,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:13:50,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:13:50,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:13:50,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:13:50,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c187c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50, skipping insertion in model container [2021-10-21 19:13:50,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:13:50,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:13:50,439 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/sv-benchmarks/c/locks/test_locks_11.c[4246,4259] [2021-10-21 19:13:50,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:13:50,451 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:13:50,482 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/sv-benchmarks/c/locks/test_locks_11.c[4246,4259] [2021-10-21 19:13:50,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:13:50,497 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:13:50,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50 WrapperNode [2021-10-21 19:13:50,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:13:50,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:13:50,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:13:50,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:13:50,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:13:50,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:13:50,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:13:50,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:13:50,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:13:50,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:13:50,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:13:50,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:13:50,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (1/1) ... [2021-10-21 19:13:50,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:13:50,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:13:50,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:13:50,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:13:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:13:50,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:13:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:13:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:13:51,195 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:13:51,196 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-21 19:13:51,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:13:51 BoogieIcfgContainer [2021-10-21 19:13:51,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:13:51,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:13:51,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:13:51,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:13:51,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:13:50" (1/3) ... [2021-10-21 19:13:51,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495cc168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:13:51, skipping insertion in model container [2021-10-21 19:13:51,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:13:50" (2/3) ... [2021-10-21 19:13:51,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495cc168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:13:51, skipping insertion in model container [2021-10-21 19:13:51,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:13:51" (3/3) ... [2021-10-21 19:13:51,211 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2021-10-21 19:13:51,217 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:13:51,217 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:13:51,293 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:13:51,304 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 [2021-10-21 19:13:51,304 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:13:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 42 states have internal predecessors, (78), 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) [2021-10-21 19:13:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:13:51,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:51,331 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:51,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:51,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:51,339 INFO L82 PathProgramCache]: Analyzing trace with hash 458919617, now seen corresponding path program 1 times [2021-10-21 19:13:51,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:51,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142966579] [2021-10-21 19:13:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:51,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:51,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:51,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142966579] [2021-10-21 19:13:51,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142966579] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:51,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:51,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:51,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825464699] [2021-10-21 19:13:51,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:51,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:51,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:51,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:51,723 INFO L87 Difference]: Start difference. First operand has 43 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 42 states have internal predecessors, (78), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-10-21 19:13:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:51,801 INFO L93 Difference]: Finished difference Result 89 states and 157 transitions. [2021-10-21 19:13:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:51,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2021-10-21 19:13:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:51,816 INFO L225 Difference]: With dead ends: 89 [2021-10-21 19:13:51,817 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 19:13:51,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 19:13:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 51. [2021-10-21 19:13:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.88) internal successors, (94), 50 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) [2021-10-21 19:13:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 94 transitions. [2021-10-21 19:13:51,876 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 94 transitions. Word has length 18 [2021-10-21 19:13:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:51,878 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 94 transitions. [2021-10-21 19:13:51,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-10-21 19:13:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 94 transitions. [2021-10-21 19:13:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:13:51,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:51,882 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:51,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:13:51,883 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash -552197633, now seen corresponding path program 1 times [2021-10-21 19:13:51,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:51,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897708185] [2021-10-21 19:13:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:51,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:52,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:52,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897708185] [2021-10-21 19:13:52,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897708185] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:52,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:52,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:52,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238422440] [2021-10-21 19:13:52,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:52,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,033 INFO L87 Difference]: Start difference. First operand 51 states and 94 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-10-21 19:13:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:52,055 INFO L93 Difference]: Finished difference Result 124 states and 229 transitions. [2021-10-21 19:13:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:52,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2021-10-21 19:13:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:52,057 INFO L225 Difference]: With dead ends: 124 [2021-10-21 19:13:52,057 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 19:13:52,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 19:13:52,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-10-21 19:13:52,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.8611111111111112) internal successors, (134), 72 states have internal predecessors, (134), 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) [2021-10-21 19:13:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 134 transitions. [2021-10-21 19:13:52,082 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 134 transitions. Word has length 18 [2021-10-21 19:13:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:52,082 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 134 transitions. [2021-10-21 19:13:52,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-10-21 19:13:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 134 transitions. [2021-10-21 19:13:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:13:52,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:52,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:52,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:13:52,085 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:52,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:52,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1341819263, now seen corresponding path program 1 times [2021-10-21 19:13:52,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:52,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744955674] [2021-10-21 19:13:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:52,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:52,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:52,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744955674] [2021-10-21 19:13:52,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744955674] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:52,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:52,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:52,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083683354] [2021-10-21 19:13:52,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:52,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:52,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,143 INFO L87 Difference]: Start difference. First operand 73 states and 134 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-21 19:13:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:52,178 INFO L93 Difference]: Finished difference Result 114 states and 204 transitions. [2021-10-21 19:13:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-10-21 19:13:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:52,181 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:13:52,182 INFO L226 Difference]: Without dead ends: 78 [2021-10-21 19:13:52,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-21 19:13:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-10-21 19:13:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.8133333333333332) internal successors, (136), 75 states have internal predecessors, (136), 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) [2021-10-21 19:13:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 136 transitions. [2021-10-21 19:13:52,200 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 136 transitions. Word has length 19 [2021-10-21 19:13:52,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:52,200 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 136 transitions. [2021-10-21 19:13:52,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-21 19:13:52,201 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 136 transitions. [2021-10-21 19:13:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:13:52,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:52,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:52,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:13:52,203 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:52,210 INFO L82 PathProgramCache]: Analyzing trace with hash 61955585, now seen corresponding path program 1 times [2021-10-21 19:13:52,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:52,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968111706] [2021-10-21 19:13:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:52,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:52,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:52,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968111706] [2021-10-21 19:13:52,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968111706] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:52,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:52,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:52,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999753137] [2021-10-21 19:13:52,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:52,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:52,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,317 INFO L87 Difference]: Start difference. First operand 76 states and 136 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-21 19:13:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:52,356 INFO L93 Difference]: Finished difference Result 145 states and 261 transitions. [2021-10-21 19:13:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:52,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-10-21 19:13:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:52,360 INFO L225 Difference]: With dead ends: 145 [2021-10-21 19:13:52,360 INFO L226 Difference]: Without dead ends: 143 [2021-10-21 19:13:52,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-21 19:13:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2021-10-21 19:13:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.81) internal successors, (181), 100 states have internal predecessors, (181), 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) [2021-10-21 19:13:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 181 transitions. [2021-10-21 19:13:52,375 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 181 transitions. Word has length 19 [2021-10-21 19:13:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:52,383 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 181 transitions. [2021-10-21 19:13:52,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-21 19:13:52,383 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 181 transitions. [2021-10-21 19:13:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:13:52,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:52,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:52,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:13:52,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:52,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:52,392 INFO L82 PathProgramCache]: Analyzing trace with hash -949161665, now seen corresponding path program 1 times [2021-10-21 19:13:52,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:52,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518187470] [2021-10-21 19:13:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:52,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:52,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:52,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518187470] [2021-10-21 19:13:52,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518187470] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:52,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:52,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:52,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813140569] [2021-10-21 19:13:52,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:52,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:52,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:52,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,474 INFO L87 Difference]: Start difference. First operand 101 states and 181 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-21 19:13:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:52,493 INFO L93 Difference]: Finished difference Result 241 states and 435 transitions. [2021-10-21 19:13:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:52,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-10-21 19:13:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:52,496 INFO L225 Difference]: With dead ends: 241 [2021-10-21 19:13:52,496 INFO L226 Difference]: Without dead ends: 145 [2021-10-21 19:13:52,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-21 19:13:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-10-21 19:13:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.795774647887324) internal successors, (255), 142 states have internal predecessors, (255), 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) [2021-10-21 19:13:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 255 transitions. [2021-10-21 19:13:52,511 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 255 transitions. Word has length 19 [2021-10-21 19:13:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:52,511 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 255 transitions. [2021-10-21 19:13:52,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-21 19:13:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 255 transitions. [2021-10-21 19:13:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:13:52,513 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:52,513 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:52,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:13:52,514 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:52,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1920836500, now seen corresponding path program 1 times [2021-10-21 19:13:52,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:52,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458658105] [2021-10-21 19:13:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:52,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:52,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:52,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458658105] [2021-10-21 19:13:52,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458658105] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:52,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:52,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:52,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781962046] [2021-10-21 19:13:52,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:52,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,570 INFO L87 Difference]: Start difference. First operand 143 states and 255 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-10-21 19:13:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:52,592 INFO L93 Difference]: Finished difference Result 216 states and 382 transitions. [2021-10-21 19:13:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:52,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2021-10-21 19:13:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:52,600 INFO L225 Difference]: With dead ends: 216 [2021-10-21 19:13:52,601 INFO L226 Difference]: Without dead ends: 147 [2021-10-21 19:13:52,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-21 19:13:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2021-10-21 19:13:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7708333333333333) internal successors, (255), 144 states have internal predecessors, (255), 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) [2021-10-21 19:13:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 255 transitions. [2021-10-21 19:13:52,616 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 255 transitions. Word has length 20 [2021-10-21 19:13:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:52,616 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 255 transitions. [2021-10-21 19:13:52,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-10-21 19:13:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 255 transitions. [2021-10-21 19:13:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:13:52,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:52,619 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:52,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:13:52,619 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:52,620 INFO L82 PathProgramCache]: Analyzing trace with hash 640972822, now seen corresponding path program 1 times [2021-10-21 19:13:52,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:52,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808020586] [2021-10-21 19:13:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:52,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:52,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:52,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808020586] [2021-10-21 19:13:52,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808020586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:52,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:52,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:52,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888626266] [2021-10-21 19:13:52,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:52,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:52,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:52,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,689 INFO L87 Difference]: Start difference. First operand 145 states and 255 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-10-21 19:13:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:52,707 INFO L93 Difference]: Finished difference Result 417 states and 737 transitions. [2021-10-21 19:13:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:52,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2021-10-21 19:13:52,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:52,710 INFO L225 Difference]: With dead ends: 417 [2021-10-21 19:13:52,710 INFO L226 Difference]: Without dead ends: 279 [2021-10-21 19:13:52,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-10-21 19:13:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2021-10-21 19:13:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.75) internal successors, (483), 276 states have internal predecessors, (483), 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) [2021-10-21 19:13:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 483 transitions. [2021-10-21 19:13:52,731 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 483 transitions. Word has length 20 [2021-10-21 19:13:52,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:52,731 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 483 transitions. [2021-10-21 19:13:52,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-10-21 19:13:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 483 transitions. [2021-10-21 19:13:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:13:52,733 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:52,733 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:52,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:13:52,734 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:52,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:52,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1652090072, now seen corresponding path program 1 times [2021-10-21 19:13:52,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:52,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353205912] [2021-10-21 19:13:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:52,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:52,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:52,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353205912] [2021-10-21 19:13:52,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353205912] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:52,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:52,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:52,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105542373] [2021-10-21 19:13:52,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:52,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,789 INFO L87 Difference]: Start difference. First operand 277 states and 483 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-10-21 19:13:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:52,822 INFO L93 Difference]: Finished difference Result 353 states and 621 transitions. [2021-10-21 19:13:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:52,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2021-10-21 19:13:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:52,828 INFO L225 Difference]: With dead ends: 353 [2021-10-21 19:13:52,831 INFO L226 Difference]: Without dead ends: 351 [2021-10-21 19:13:52,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-10-21 19:13:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 277. [2021-10-21 19:13:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.7355072463768115) internal successors, (479), 276 states have internal predecessors, (479), 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) [2021-10-21 19:13:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 479 transitions. [2021-10-21 19:13:52,861 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 479 transitions. Word has length 20 [2021-10-21 19:13:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:52,861 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 479 transitions. [2021-10-21 19:13:52,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-10-21 19:13:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 479 transitions. [2021-10-21 19:13:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:13:52,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:52,867 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:52,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:13:52,872 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:52,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1604465292, now seen corresponding path program 1 times [2021-10-21 19:13:52,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:52,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44315977] [2021-10-21 19:13:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:52,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:52,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:52,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44315977] [2021-10-21 19:13:52,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44315977] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:52,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:52,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:52,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325899450] [2021-10-21 19:13:52,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:52,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,906 INFO L87 Difference]: Start difference. First operand 277 states and 479 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-10-21 19:13:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:52,926 INFO L93 Difference]: Finished difference Result 517 states and 905 transitions. [2021-10-21 19:13:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:52,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2021-10-21 19:13:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:52,931 INFO L225 Difference]: With dead ends: 517 [2021-10-21 19:13:52,931 INFO L226 Difference]: Without dead ends: 515 [2021-10-21 19:13:52,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-10-21 19:13:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 385. [2021-10-21 19:13:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.7057291666666667) internal successors, (655), 384 states have internal predecessors, (655), 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) [2021-10-21 19:13:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 655 transitions. [2021-10-21 19:13:52,960 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 655 transitions. Word has length 21 [2021-10-21 19:13:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:52,960 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 655 transitions. [2021-10-21 19:13:52,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-10-21 19:13:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 655 transitions. [2021-10-21 19:13:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:13:52,963 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:52,963 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:52,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:13:52,966 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1679384754, now seen corresponding path program 1 times [2021-10-21 19:13:52,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:52,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379125463] [2021-10-21 19:13:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:52,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:53,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:53,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379125463] [2021-10-21 19:13:53,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379125463] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:53,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:53,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:53,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150462361] [2021-10-21 19:13:53,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:53,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,031 INFO L87 Difference]: Start difference. First operand 385 states and 655 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-10-21 19:13:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:53,054 INFO L93 Difference]: Finished difference Result 917 states and 1569 transitions. [2021-10-21 19:13:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:53,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2021-10-21 19:13:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:53,058 INFO L225 Difference]: With dead ends: 917 [2021-10-21 19:13:53,058 INFO L226 Difference]: Without dead ends: 539 [2021-10-21 19:13:53,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-10-21 19:13:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 537. [2021-10-21 19:13:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.6921641791044777) internal successors, (907), 536 states have internal predecessors, (907), 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) [2021-10-21 19:13:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 907 transitions. [2021-10-21 19:13:53,082 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 907 transitions. Word has length 21 [2021-10-21 19:13:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:53,082 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 907 transitions. [2021-10-21 19:13:53,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-10-21 19:13:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 907 transitions. [2021-10-21 19:13:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:13:53,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:53,084 INFO L512 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] [2021-10-21 19:13:53,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:13:53,084 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1801397547, now seen corresponding path program 1 times [2021-10-21 19:13:53,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:53,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152967089] [2021-10-21 19:13:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:53,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:53,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:53,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152967089] [2021-10-21 19:13:53,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152967089] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:53,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:53,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:53,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872631936] [2021-10-21 19:13:53,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:53,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:53,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:53,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,114 INFO L87 Difference]: Start difference. First operand 537 states and 907 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-10-21 19:13:53,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:53,134 INFO L93 Difference]: Finished difference Result 813 states and 1369 transitions. [2021-10-21 19:13:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 22 [2021-10-21 19:13:53,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:53,138 INFO L225 Difference]: With dead ends: 813 [2021-10-21 19:13:53,139 INFO L226 Difference]: Without dead ends: 551 [2021-10-21 19:13:53,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-10-21 19:13:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 549. [2021-10-21 19:13:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.6697080291970803) internal successors, (915), 548 states have internal predecessors, (915), 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) [2021-10-21 19:13:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 915 transitions. [2021-10-21 19:13:53,167 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 915 transitions. Word has length 22 [2021-10-21 19:13:53,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:53,167 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 915 transitions. [2021-10-21 19:13:53,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-10-21 19:13:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 915 transitions. [2021-10-21 19:13:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:13:53,170 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:53,170 INFO L512 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] [2021-10-21 19:13:53,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:13:53,171 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:53,171 INFO L82 PathProgramCache]: Analyzing trace with hash 521533869, now seen corresponding path program 1 times [2021-10-21 19:13:53,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:53,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587730751] [2021-10-21 19:13:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:53,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:53,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:53,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587730751] [2021-10-21 19:13:53,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587730751] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:53,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:53,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:53,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156204675] [2021-10-21 19:13:53,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:53,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:53,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,224 INFO L87 Difference]: Start difference. First operand 549 states and 915 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-10-21 19:13:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:53,262 INFO L93 Difference]: Finished difference Result 1001 states and 1693 transitions. [2021-10-21 19:13:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 22 [2021-10-21 19:13:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:53,274 INFO L225 Difference]: With dead ends: 1001 [2021-10-21 19:13:53,274 INFO L226 Difference]: Without dead ends: 999 [2021-10-21 19:13:53,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-10-21 19:13:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 773. [2021-10-21 19:13:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.6308290155440415) internal successors, (1259), 772 states have internal predecessors, (1259), 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) [2021-10-21 19:13:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1259 transitions. [2021-10-21 19:13:53,320 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1259 transitions. Word has length 22 [2021-10-21 19:13:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:53,322 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 1259 transitions. [2021-10-21 19:13:53,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-10-21 19:13:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1259 transitions. [2021-10-21 19:13:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:13:53,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:53,340 INFO L512 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] [2021-10-21 19:13:53,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:13:53,340 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:53,341 INFO L82 PathProgramCache]: Analyzing trace with hash -489583381, now seen corresponding path program 1 times [2021-10-21 19:13:53,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:53,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796693430] [2021-10-21 19:13:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:53,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:53,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:53,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796693430] [2021-10-21 19:13:53,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796693430] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:53,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:53,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:53,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704859153] [2021-10-21 19:13:53,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:53,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:53,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:53,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,410 INFO L87 Difference]: Start difference. First operand 773 states and 1259 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-10-21 19:13:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:53,447 INFO L93 Difference]: Finished difference Result 1817 states and 2973 transitions. [2021-10-21 19:13:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:53,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 22 [2021-10-21 19:13:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:53,455 INFO L225 Difference]: With dead ends: 1817 [2021-10-21 19:13:53,455 INFO L226 Difference]: Without dead ends: 1063 [2021-10-21 19:13:53,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-10-21 19:13:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1061. [2021-10-21 19:13:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 1.6179245283018868) internal successors, (1715), 1060 states have internal predecessors, (1715), 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) [2021-10-21 19:13:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1715 transitions. [2021-10-21 19:13:53,497 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1715 transitions. Word has length 22 [2021-10-21 19:13:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:53,497 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1715 transitions. [2021-10-21 19:13:53,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-10-21 19:13:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1715 transitions. [2021-10-21 19:13:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:13:53,499 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:53,500 INFO L512 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] [2021-10-21 19:13:53,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:13:53,500 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1012104857, now seen corresponding path program 1 times [2021-10-21 19:13:53,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:53,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630946740] [2021-10-21 19:13:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:53,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:53,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:53,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630946740] [2021-10-21 19:13:53,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630946740] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:53,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:53,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:53,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048076380] [2021-10-21 19:13:53,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:53,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,559 INFO L87 Difference]: Start difference. First operand 1061 states and 1715 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-10-21 19:13:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:53,595 INFO L93 Difference]: Finished difference Result 1593 states and 2565 transitions. [2021-10-21 19:13:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:53,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2021-10-21 19:13:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:53,603 INFO L225 Difference]: With dead ends: 1593 [2021-10-21 19:13:53,603 INFO L226 Difference]: Without dead ends: 1079 [2021-10-21 19:13:53,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-10-21 19:13:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1077. [2021-10-21 19:13:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.5938661710037174) internal successors, (1715), 1076 states have internal predecessors, (1715), 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) [2021-10-21 19:13:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1715 transitions. [2021-10-21 19:13:53,642 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1715 transitions. Word has length 23 [2021-10-21 19:13:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:53,642 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1715 transitions. [2021-10-21 19:13:53,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-10-21 19:13:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1715 transitions. [2021-10-21 19:13:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:13:53,644 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:53,645 INFO L512 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] [2021-10-21 19:13:53,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:13:53,645 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2002998761, now seen corresponding path program 1 times [2021-10-21 19:13:53,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:53,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867796504] [2021-10-21 19:13:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:53,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:53,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:53,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867796504] [2021-10-21 19:13:53,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867796504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:53,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:53,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:53,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237120822] [2021-10-21 19:13:53,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:53,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:53,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:53,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,672 INFO L87 Difference]: Start difference. First operand 1077 states and 1715 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-10-21 19:13:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:53,712 INFO L93 Difference]: Finished difference Result 1929 states and 3125 transitions. [2021-10-21 19:13:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:53,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2021-10-21 19:13:53,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:53,725 INFO L225 Difference]: With dead ends: 1929 [2021-10-21 19:13:53,726 INFO L226 Difference]: Without dead ends: 1927 [2021-10-21 19:13:53,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2021-10-21 19:13:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1541. [2021-10-21 19:13:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 1.55) internal successors, (2387), 1540 states have internal predecessors, (2387), 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) [2021-10-21 19:13:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2387 transitions. [2021-10-21 19:13:53,787 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2387 transitions. Word has length 23 [2021-10-21 19:13:53,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:53,788 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 2387 transitions. [2021-10-21 19:13:53,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-10-21 19:13:53,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2387 transitions. [2021-10-21 19:13:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:13:53,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:53,791 INFO L512 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] [2021-10-21 19:13:53,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:13:53,792 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:53,792 INFO L82 PathProgramCache]: Analyzing trace with hash 991881511, now seen corresponding path program 1 times [2021-10-21 19:13:53,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:53,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507206415] [2021-10-21 19:13:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:53,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:53,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:53,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507206415] [2021-10-21 19:13:53,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507206415] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:53,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:53,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:53,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557339387] [2021-10-21 19:13:53,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:53,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,837 INFO L87 Difference]: Start difference. First operand 1541 states and 2387 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-10-21 19:13:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:53,889 INFO L93 Difference]: Finished difference Result 3593 states and 5589 transitions. [2021-10-21 19:13:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:53,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2021-10-21 19:13:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:53,902 INFO L225 Difference]: With dead ends: 3593 [2021-10-21 19:13:53,903 INFO L226 Difference]: Without dead ends: 2087 [2021-10-21 19:13:53,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-10-21 19:13:53,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 2085. [2021-10-21 19:13:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2084 states have (on average 1.5369481765834934) internal successors, (3203), 2084 states have internal predecessors, (3203), 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) [2021-10-21 19:13:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 3203 transitions. [2021-10-21 19:13:54,002 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 3203 transitions. Word has length 23 [2021-10-21 19:13:54,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:54,002 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 3203 transitions. [2021-10-21 19:13:54,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-10-21 19:13:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 3203 transitions. [2021-10-21 19:13:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:13:54,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:54,006 INFO L512 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] [2021-10-21 19:13:54,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:13:54,007 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:54,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1963634176, now seen corresponding path program 1 times [2021-10-21 19:13:54,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:54,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116520193] [2021-10-21 19:13:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:54,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:54,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:54,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116520193] [2021-10-21 19:13:54,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116520193] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:54,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:54,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:54,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598426829] [2021-10-21 19:13:54,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:54,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:54,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:54,043 INFO L87 Difference]: Start difference. First operand 2085 states and 3203 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-10-21 19:13:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:54,080 INFO L93 Difference]: Finished difference Result 3129 states and 4789 transitions. [2021-10-21 19:13:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:54,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2021-10-21 19:13:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:54,094 INFO L225 Difference]: With dead ends: 3129 [2021-10-21 19:13:54,094 INFO L226 Difference]: Without dead ends: 2119 [2021-10-21 19:13:54,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-10-21 19:13:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 2117. [2021-10-21 19:13:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 1.5137051039697542) internal successors, (3203), 2116 states have internal predecessors, (3203), 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) [2021-10-21 19:13:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3203 transitions. [2021-10-21 19:13:54,171 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3203 transitions. Word has length 24 [2021-10-21 19:13:54,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:54,172 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 3203 transitions. [2021-10-21 19:13:54,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-10-21 19:13:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3203 transitions. [2021-10-21 19:13:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:13:54,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:54,175 INFO L512 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] [2021-10-21 19:13:54,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:13:54,176 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:54,176 INFO L82 PathProgramCache]: Analyzing trace with hash 683770498, now seen corresponding path program 1 times [2021-10-21 19:13:54,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:54,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91011558] [2021-10-21 19:13:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:54,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:54,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:54,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91011558] [2021-10-21 19:13:54,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91011558] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:54,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:54,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:54,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122984183] [2021-10-21 19:13:54,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:54,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:54,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:54,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:54,210 INFO L87 Difference]: Start difference. First operand 2117 states and 3203 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-10-21 19:13:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:54,270 INFO L93 Difference]: Finished difference Result 3721 states and 5733 transitions. [2021-10-21 19:13:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:54,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2021-10-21 19:13:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:54,292 INFO L225 Difference]: With dead ends: 3721 [2021-10-21 19:13:54,292 INFO L226 Difference]: Without dead ends: 3719 [2021-10-21 19:13:54,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-10-21 19:13:54,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3077. [2021-10-21 19:13:54,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 1.467815344603381) internal successors, (4515), 3076 states have internal predecessors, (4515), 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) [2021-10-21 19:13:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 4515 transitions. [2021-10-21 19:13:54,396 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 4515 transitions. Word has length 24 [2021-10-21 19:13:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:54,397 INFO L470 AbstractCegarLoop]: Abstraction has 3077 states and 4515 transitions. [2021-10-21 19:13:54,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-10-21 19:13:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 4515 transitions. [2021-10-21 19:13:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:13:54,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:54,403 INFO L512 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] [2021-10-21 19:13:54,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 19:13:54,403 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:54,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:54,404 INFO L82 PathProgramCache]: Analyzing trace with hash -327346752, now seen corresponding path program 1 times [2021-10-21 19:13:54,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:54,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773717600] [2021-10-21 19:13:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:54,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:54,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:54,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773717600] [2021-10-21 19:13:54,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773717600] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:54,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:54,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:54,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054238331] [2021-10-21 19:13:54,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:54,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:54,461 INFO L87 Difference]: Start difference. First operand 3077 states and 4515 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-10-21 19:13:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:54,541 INFO L93 Difference]: Finished difference Result 7113 states and 10469 transitions. [2021-10-21 19:13:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:54,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2021-10-21 19:13:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:54,564 INFO L225 Difference]: With dead ends: 7113 [2021-10-21 19:13:54,565 INFO L226 Difference]: Without dead ends: 4103 [2021-10-21 19:13:54,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2021-10-21 19:13:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 4101. [2021-10-21 19:13:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 4100 states have (on average 1.4524390243902439) internal successors, (5955), 4100 states have internal predecessors, (5955), 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) [2021-10-21 19:13:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 5955 transitions. [2021-10-21 19:13:54,720 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 5955 transitions. Word has length 24 [2021-10-21 19:13:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:54,720 INFO L470 AbstractCegarLoop]: Abstraction has 4101 states and 5955 transitions. [2021-10-21 19:13:54,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-10-21 19:13:54,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 5955 transitions. [2021-10-21 19:13:54,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:13:54,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:54,726 INFO L512 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] [2021-10-21 19:13:54,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 19:13:54,727 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:54,727 INFO L82 PathProgramCache]: Analyzing trace with hash -277735972, now seen corresponding path program 1 times [2021-10-21 19:13:54,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:54,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966343051] [2021-10-21 19:13:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:54,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:54,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:54,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966343051] [2021-10-21 19:13:54,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966343051] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:54,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:54,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:54,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617615618] [2021-10-21 19:13:54,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:54,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:54,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:54,759 INFO L87 Difference]: Start difference. First operand 4101 states and 5955 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-21 19:13:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:54,825 INFO L93 Difference]: Finished difference Result 6153 states and 8901 transitions. [2021-10-21 19:13:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 25 [2021-10-21 19:13:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:54,866 INFO L225 Difference]: With dead ends: 6153 [2021-10-21 19:13:54,866 INFO L226 Difference]: Without dead ends: 4167 [2021-10-21 19:13:54,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:54,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-10-21 19:13:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 4165. [2021-10-21 19:13:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4165 states, 4164 states have (on average 1.430115273775216) internal successors, (5955), 4164 states have internal predecessors, (5955), 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) [2021-10-21 19:13:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 5955 transitions. [2021-10-21 19:13:55,051 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 5955 transitions. Word has length 25 [2021-10-21 19:13:55,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:55,052 INFO L470 AbstractCegarLoop]: Abstraction has 4165 states and 5955 transitions. [2021-10-21 19:13:55,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-21 19:13:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 5955 transitions. [2021-10-21 19:13:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:13:55,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:55,058 INFO L512 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] [2021-10-21 19:13:55,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 19:13:55,058 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1557599650, now seen corresponding path program 1 times [2021-10-21 19:13:55,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:55,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366947165] [2021-10-21 19:13:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:55,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:55,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:55,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366947165] [2021-10-21 19:13:55,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366947165] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:55,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:55,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:55,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203744014] [2021-10-21 19:13:55,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:55,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:55,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:55,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:55,088 INFO L87 Difference]: Start difference. First operand 4165 states and 5955 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-21 19:13:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:55,186 INFO L93 Difference]: Finished difference Result 7177 states and 10437 transitions. [2021-10-21 19:13:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:55,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 25 [2021-10-21 19:13:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:55,202 INFO L225 Difference]: With dead ends: 7177 [2021-10-21 19:13:55,202 INFO L226 Difference]: Without dead ends: 7175 [2021-10-21 19:13:55,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2021-10-21 19:13:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 6149. [2021-10-21 19:13:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6149 states, 6148 states have (on average 1.385003253090436) internal successors, (8515), 6148 states have internal predecessors, (8515), 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) [2021-10-21 19:13:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6149 states to 6149 states and 8515 transitions. [2021-10-21 19:13:55,409 INFO L78 Accepts]: Start accepts. Automaton has 6149 states and 8515 transitions. Word has length 25 [2021-10-21 19:13:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:55,409 INFO L470 AbstractCegarLoop]: Abstraction has 6149 states and 8515 transitions. [2021-10-21 19:13:55,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-21 19:13:55,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6149 states and 8515 transitions. [2021-10-21 19:13:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:13:55,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:55,420 INFO L512 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] [2021-10-21 19:13:55,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-21 19:13:55,421 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1726250396, now seen corresponding path program 1 times [2021-10-21 19:13:55,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:55,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932844714] [2021-10-21 19:13:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:55,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:55,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:55,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932844714] [2021-10-21 19:13:55,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932844714] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:55,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:55,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:55,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408534609] [2021-10-21 19:13:55,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:55,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:55,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:55,468 INFO L87 Difference]: Start difference. First operand 6149 states and 8515 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-21 19:13:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:55,606 INFO L93 Difference]: Finished difference Result 14089 states and 19525 transitions. [2021-10-21 19:13:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:55,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 25 [2021-10-21 19:13:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:55,624 INFO L225 Difference]: With dead ends: 14089 [2021-10-21 19:13:55,624 INFO L226 Difference]: Without dead ends: 8071 [2021-10-21 19:13:55,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8071 states. [2021-10-21 19:13:55,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8071 to 8069. [2021-10-21 19:13:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8069 states, 8068 states have (on average 1.364774417451661) internal successors, (11011), 8068 states have internal predecessors, (11011), 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) [2021-10-21 19:13:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 11011 transitions. [2021-10-21 19:13:55,893 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 11011 transitions. Word has length 25 [2021-10-21 19:13:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:55,894 INFO L470 AbstractCegarLoop]: Abstraction has 8069 states and 11011 transitions. [2021-10-21 19:13:55,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-21 19:13:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 11011 transitions. [2021-10-21 19:13:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:13:55,905 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:55,905 INFO L512 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] [2021-10-21 19:13:55,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-21 19:13:55,906 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:55,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:55,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1040733483, now seen corresponding path program 1 times [2021-10-21 19:13:55,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:55,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503167508] [2021-10-21 19:13:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:55,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:55,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:55,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503167508] [2021-10-21 19:13:55,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503167508] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:55,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:55,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:55,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802282407] [2021-10-21 19:13:55,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:55,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:55,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:55,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:55,938 INFO L87 Difference]: Start difference. First operand 8069 states and 11011 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-10-21 19:13:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:56,053 INFO L93 Difference]: Finished difference Result 12105 states and 16453 transitions. [2021-10-21 19:13:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:56,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 26 [2021-10-21 19:13:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:56,069 INFO L225 Difference]: With dead ends: 12105 [2021-10-21 19:13:56,069 INFO L226 Difference]: Without dead ends: 8199 [2021-10-21 19:13:56,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8199 states. [2021-10-21 19:13:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8199 to 8197. [2021-10-21 19:13:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8197 states, 8196 states have (on average 1.343460224499756) internal successors, (11011), 8196 states have internal predecessors, (11011), 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) [2021-10-21 19:13:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8197 states to 8197 states and 11011 transitions. [2021-10-21 19:13:56,350 INFO L78 Accepts]: Start accepts. Automaton has 8197 states and 11011 transitions. Word has length 26 [2021-10-21 19:13:56,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:56,351 INFO L470 AbstractCegarLoop]: Abstraction has 8197 states and 11011 transitions. [2021-10-21 19:13:56,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-10-21 19:13:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 8197 states and 11011 transitions. [2021-10-21 19:13:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:13:56,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:56,362 INFO L512 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] [2021-10-21 19:13:56,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-21 19:13:56,362 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:56,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1974370135, now seen corresponding path program 1 times [2021-10-21 19:13:56,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:56,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593634928] [2021-10-21 19:13:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:56,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:56,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:56,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593634928] [2021-10-21 19:13:56,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593634928] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:56,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:56,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:56,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476691598] [2021-10-21 19:13:56,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:56,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:56,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:56,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:56,413 INFO L87 Difference]: Start difference. First operand 8197 states and 11011 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-10-21 19:13:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:56,664 INFO L93 Difference]: Finished difference Result 13833 states and 18821 transitions. [2021-10-21 19:13:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 26 [2021-10-21 19:13:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:56,694 INFO L225 Difference]: With dead ends: 13833 [2021-10-21 19:13:56,694 INFO L226 Difference]: Without dead ends: 13831 [2021-10-21 19:13:56,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13831 states. [2021-10-21 19:13:57,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13831 to 12293. [2021-10-21 19:13:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12293 states, 12292 states have (on average 1.3019036771884152) internal successors, (16003), 12292 states have internal predecessors, (16003), 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) [2021-10-21 19:13:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12293 states to 12293 states and 16003 transitions. [2021-10-21 19:13:57,093 INFO L78 Accepts]: Start accepts. Automaton has 12293 states and 16003 transitions. Word has length 26 [2021-10-21 19:13:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:57,093 INFO L470 AbstractCegarLoop]: Abstraction has 12293 states and 16003 transitions. [2021-10-21 19:13:57,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-10-21 19:13:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 12293 states and 16003 transitions. [2021-10-21 19:13:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:13:57,114 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:57,114 INFO L512 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] [2021-10-21 19:13:57,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-21 19:13:57,114 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash 963252885, now seen corresponding path program 1 times [2021-10-21 19:13:57,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:57,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375061698] [2021-10-21 19:13:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:57,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:57,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:57,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375061698] [2021-10-21 19:13:57,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375061698] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:57,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:57,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:57,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510871574] [2021-10-21 19:13:57,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:57,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:57,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:57,142 INFO L87 Difference]: Start difference. First operand 12293 states and 16003 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-10-21 19:13:57,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:57,387 INFO L93 Difference]: Finished difference Result 27913 states and 36229 transitions. [2021-10-21 19:13:57,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:57,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 26 [2021-10-21 19:13:57,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:57,506 INFO L225 Difference]: With dead ends: 27913 [2021-10-21 19:13:57,506 INFO L226 Difference]: Without dead ends: 15879 [2021-10-21 19:13:57,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15879 states. [2021-10-21 19:13:57,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15879 to 15877. [2021-10-21 19:13:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15877 states, 15876 states have (on average 1.2740614764424287) internal successors, (20227), 15876 states have internal predecessors, (20227), 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) [2021-10-21 19:13:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15877 states to 15877 states and 20227 transitions. [2021-10-21 19:13:57,967 INFO L78 Accepts]: Start accepts. Automaton has 15877 states and 20227 transitions. Word has length 26 [2021-10-21 19:13:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:57,968 INFO L470 AbstractCegarLoop]: Abstraction has 15877 states and 20227 transitions. [2021-10-21 19:13:57,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-10-21 19:13:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 15877 states and 20227 transitions. [2021-10-21 19:13:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:13:57,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:57,989 INFO L512 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] [2021-10-21 19:13:57,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-21 19:13:57,990 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:57,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1076147793, now seen corresponding path program 1 times [2021-10-21 19:13:57,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:57,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887620311] [2021-10-21 19:13:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:57,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:58,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:58,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887620311] [2021-10-21 19:13:58,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887620311] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:58,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:58,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:58,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102931799] [2021-10-21 19:13:58,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:58,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:58,020 INFO L87 Difference]: Start difference. First operand 15877 states and 20227 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-10-21 19:13:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:58,366 INFO L93 Difference]: Finished difference Result 23817 states and 30213 transitions. [2021-10-21 19:13:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:58,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2021-10-21 19:13:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:58,405 INFO L225 Difference]: With dead ends: 23817 [2021-10-21 19:13:58,405 INFO L226 Difference]: Without dead ends: 16135 [2021-10-21 19:13:58,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16135 states. [2021-10-21 19:13:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16135 to 16133. [2021-10-21 19:13:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16133 states, 16132 states have (on average 1.2538432928341186) internal successors, (20227), 16132 states have internal predecessors, (20227), 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) [2021-10-21 19:13:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16133 states to 16133 states and 20227 transitions. [2021-10-21 19:13:58,897 INFO L78 Accepts]: Start accepts. Automaton has 16133 states and 20227 transitions. Word has length 27 [2021-10-21 19:13:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:58,898 INFO L470 AbstractCegarLoop]: Abstraction has 16133 states and 20227 transitions. [2021-10-21 19:13:58,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-10-21 19:13:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 16133 states and 20227 transitions. [2021-10-21 19:13:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:13:58,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:58,922 INFO L512 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] [2021-10-21 19:13:58,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-21 19:13:58,923 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:13:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:58,924 INFO L82 PathProgramCache]: Analyzing trace with hash -203715885, now seen corresponding path program 1 times [2021-10-21 19:13:58,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:58,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768394210] [2021-10-21 19:13:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:58,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:58,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:58,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768394210] [2021-10-21 19:13:58,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768394210] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:58,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:58,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:13:58,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036348855] [2021-10-21 19:13:58,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:13:58,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:13:58,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:58,952 INFO L87 Difference]: Start difference. First operand 16133 states and 20227 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-10-21 19:13:59,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:59,352 INFO L93 Difference]: Finished difference Result 26633 states and 33541 transitions. [2021-10-21 19:13:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:13:59,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2021-10-21 19:13:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:59,412 INFO L225 Difference]: With dead ends: 26633 [2021-10-21 19:13:59,413 INFO L226 Difference]: Without dead ends: 26631 [2021-10-21 19:13:59,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:13:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26631 states. [2021-10-21 19:14:00,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26631 to 24581. [2021-10-21 19:14:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24581 states, 24580 states have (on average 1.2186737184703011) internal successors, (29955), 24580 states have internal predecessors, (29955), 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) [2021-10-21 19:14:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24581 states to 24581 states and 29955 transitions. [2021-10-21 19:14:00,091 INFO L78 Accepts]: Start accepts. Automaton has 24581 states and 29955 transitions. Word has length 27 [2021-10-21 19:14:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:14:00,091 INFO L470 AbstractCegarLoop]: Abstraction has 24581 states and 29955 transitions. [2021-10-21 19:14:00,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-10-21 19:14:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 24581 states and 29955 transitions. [2021-10-21 19:14:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:14:00,131 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:14:00,131 INFO L512 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] [2021-10-21 19:14:00,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-21 19:14:00,132 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:14:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:14:00,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1214833135, now seen corresponding path program 1 times [2021-10-21 19:14:00,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:14:00,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417630560] [2021-10-21 19:14:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:14:00,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:14:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:14:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:14:00,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:14:00,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417630560] [2021-10-21 19:14:00,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417630560] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:14:00,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:14:00,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:14:00,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270090308] [2021-10-21 19:14:00,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:14:00,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:14:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:14:00,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:14:00,157 INFO L87 Difference]: Start difference. First operand 24581 states and 29955 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-10-21 19:14:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:14:00,737 INFO L93 Difference]: Finished difference Result 55305 states and 66821 transitions. [2021-10-21 19:14:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:14:00,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2021-10-21 19:14:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:14:00,864 INFO L225 Difference]: With dead ends: 55305 [2021-10-21 19:14:00,864 INFO L226 Difference]: Without dead ends: 31239 [2021-10-21 19:14:00,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:14:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31239 states. [2021-10-21 19:14:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31239 to 31237. [2021-10-21 19:14:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31237 states, 31236 states have (on average 1.1802727621974645) internal successors, (36867), 31236 states have internal predecessors, (36867), 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) [2021-10-21 19:14:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31237 states to 31237 states and 36867 transitions. [2021-10-21 19:14:01,762 INFO L78 Accepts]: Start accepts. Automaton has 31237 states and 36867 transitions. Word has length 27 [2021-10-21 19:14:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:14:01,763 INFO L470 AbstractCegarLoop]: Abstraction has 31237 states and 36867 transitions. [2021-10-21 19:14:01,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-10-21 19:14:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 31237 states and 36867 transitions. [2021-10-21 19:14:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:14:01,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:14:01,786 INFO L512 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] [2021-10-21 19:14:01,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-21 19:14:01,787 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:14:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:14:01,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2020009046, now seen corresponding path program 1 times [2021-10-21 19:14:01,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:14:01,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248978572] [2021-10-21 19:14:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:14:01,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:14:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:14:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:14:01,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:14:01,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248978572] [2021-10-21 19:14:01,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248978572] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:14:01,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:14:01,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:14:01,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215288212] [2021-10-21 19:14:01,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:14:01,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:14:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:14:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:14:01,816 INFO L87 Difference]: Start difference. First operand 31237 states and 36867 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-21 19:14:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:14:02,272 INFO L93 Difference]: Finished difference Result 46857 states and 55045 transitions. [2021-10-21 19:14:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:14:02,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2021-10-21 19:14:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:14:02,322 INFO L225 Difference]: With dead ends: 46857 [2021-10-21 19:14:02,322 INFO L226 Difference]: Without dead ends: 31751 [2021-10-21 19:14:02,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:14:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31751 states. [2021-10-21 19:14:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31751 to 31749. [2021-10-21 19:14:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31749 states, 31748 states have (on average 1.1612385032128008) internal successors, (36867), 31748 states have internal predecessors, (36867), 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) [2021-10-21 19:14:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31749 states to 31749 states and 36867 transitions. [2021-10-21 19:14:03,095 INFO L78 Accepts]: Start accepts. Automaton has 31749 states and 36867 transitions. Word has length 28 [2021-10-21 19:14:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:14:03,095 INFO L470 AbstractCegarLoop]: Abstraction has 31749 states and 36867 transitions. [2021-10-21 19:14:03,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-21 19:14:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 31749 states and 36867 transitions. [2021-10-21 19:14:03,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:14:03,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:14:03,121 INFO L512 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] [2021-10-21 19:14:03,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-21 19:14:03,121 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:14:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:14:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash 995094572, now seen corresponding path program 1 times [2021-10-21 19:14:03,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:14:03,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951701128] [2021-10-21 19:14:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:14:03,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:14:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:14:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:14:03,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:14:03,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951701128] [2021-10-21 19:14:03,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951701128] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:14:03,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:14:03,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:14:03,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701771926] [2021-10-21 19:14:03,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:14:03,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:14:03,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:14:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:14:03,149 INFO L87 Difference]: Start difference. First operand 31749 states and 36867 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-21 19:14:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:14:03,850 INFO L93 Difference]: Finished difference Result 92167 states and 104452 transitions. [2021-10-21 19:14:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:14:03,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2021-10-21 19:14:03,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:14:03,901 INFO L225 Difference]: With dead ends: 92167 [2021-10-21 19:14:03,902 INFO L226 Difference]: Without dead ends: 31749 [2021-10-21 19:14:03,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:14:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31749 states. [2021-10-21 19:14:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31749 to 31749. [2021-10-21 19:14:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31749 states, 31748 states have (on average 1.096730502708832) internal successors, (34819), 31748 states have internal predecessors, (34819), 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) [2021-10-21 19:14:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31749 states to 31749 states and 34819 transitions. [2021-10-21 19:14:04,590 INFO L78 Accepts]: Start accepts. Automaton has 31749 states and 34819 transitions. Word has length 28 [2021-10-21 19:14:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:14:04,590 INFO L470 AbstractCegarLoop]: Abstraction has 31749 states and 34819 transitions. [2021-10-21 19:14:04,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-21 19:14:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 31749 states and 34819 transitions. [2021-10-21 19:14:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:14:04,613 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:14:04,613 INFO L512 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] [2021-10-21 19:14:04,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-21 19:14:04,614 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:14:04,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:14:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2006211822, now seen corresponding path program 1 times [2021-10-21 19:14:04,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:14:04,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278961283] [2021-10-21 19:14:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:14:04,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:14:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:14:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:14:04,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:14:04,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278961283] [2021-10-21 19:14:04,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278961283] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:14:04,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:14:04,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:14:04,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570558700] [2021-10-21 19:14:04,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:14:04,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:14:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:14:04,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:14:04,639 INFO L87 Difference]: Start difference. First operand 31749 states and 34819 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-21 19:14:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:14:05,192 INFO L93 Difference]: Finished difference Result 31749 states and 34819 transitions. [2021-10-21 19:14:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:14:05,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2021-10-21 19:14:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:14:05,193 INFO L225 Difference]: With dead ends: 31749 [2021-10-21 19:14:05,194 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:14:05,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:14:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:14:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:14:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-21 19:14:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:14:05,213 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-10-21 19:14:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:14:05,213 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:14:05,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-21 19:14:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:14:05,214 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:14:05,217 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:14:05,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-21 19:14:05,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 19:14:05,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:14:05,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:14:05,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:14:05,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:14:05,240 INFO L857 garLoopResultBuilder]: For program point L159-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,240 INFO L857 garLoopResultBuilder]: For program point L93-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,240 INFO L857 garLoopResultBuilder]: For program point L85-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,240 INFO L857 garLoopResultBuilder]: For program point L77-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,241 INFO L857 garLoopResultBuilder]: For program point L135(line 135) no Hoare annotation was computed. [2021-10-21 19:14:05,241 INFO L857 garLoopResultBuilder]: For program point L160(line 160) no Hoare annotation was computed. [2021-10-21 19:14:05,241 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 19:14:05,241 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 19:14:05,241 INFO L857 garLoopResultBuilder]: For program point L119-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,242 INFO L857 garLoopResultBuilder]: For program point L144-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,242 INFO L860 garLoopResultBuilder]: At program point L169-1(lines 44 174) the Hoare annotation is: true [2021-10-21 19:14:05,242 INFO L857 garLoopResultBuilder]: For program point L120(line 120) no Hoare annotation was computed. [2021-10-21 19:14:05,242 INFO L860 garLoopResultBuilder]: At program point L178(lines 6 179) the Hoare annotation is: true [2021-10-21 19:14:05,243 INFO L857 garLoopResultBuilder]: For program point L145(line 145) no Hoare annotation was computed. [2021-10-21 19:14:05,243 INFO L857 garLoopResultBuilder]: For program point L46(lines 46 48) no Hoare annotation was computed. [2021-10-21 19:14:05,243 INFO L857 garLoopResultBuilder]: For program point L170(line 170) no Hoare annotation was computed. [2021-10-21 19:14:05,243 INFO L853 garLoopResultBuilder]: At program point L170-1(lines 7 179) the Hoare annotation is: false [2021-10-21 19:14:05,243 INFO L857 garLoopResultBuilder]: For program point L129-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,244 INFO L857 garLoopResultBuilder]: For program point L154-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,244 INFO L857 garLoopResultBuilder]: For program point L113-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,244 INFO L857 garLoopResultBuilder]: For program point L105-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,244 INFO L857 garLoopResultBuilder]: For program point L130(line 130) no Hoare annotation was computed. [2021-10-21 19:14:05,244 INFO L857 garLoopResultBuilder]: For program point L97-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,245 INFO L857 garLoopResultBuilder]: For program point L155(line 155) no Hoare annotation was computed. [2021-10-21 19:14:05,245 INFO L857 garLoopResultBuilder]: For program point L89-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,245 INFO L857 garLoopResultBuilder]: For program point L81-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,245 INFO L857 garLoopResultBuilder]: For program point L139-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,245 INFO L857 garLoopResultBuilder]: For program point L73(lines 73 75) no Hoare annotation was computed. [2021-10-21 19:14:05,246 INFO L857 garLoopResultBuilder]: For program point L73-2(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,246 INFO L857 garLoopResultBuilder]: For program point L164-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,246 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 19:14:05,246 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 177) no Hoare annotation was computed. [2021-10-21 19:14:05,246 INFO L857 garLoopResultBuilder]: For program point L140(line 140) no Hoare annotation was computed. [2021-10-21 19:14:05,247 INFO L857 garLoopResultBuilder]: For program point L165(line 165) no Hoare annotation was computed. [2021-10-21 19:14:05,247 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 19:14:05,247 INFO L857 garLoopResultBuilder]: For program point L124-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,247 INFO L857 garLoopResultBuilder]: For program point L149-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,247 INFO L857 garLoopResultBuilder]: For program point L125(line 125) no Hoare annotation was computed. [2021-10-21 19:14:05,248 INFO L857 garLoopResultBuilder]: For program point L150(line 150) no Hoare annotation was computed. [2021-10-21 19:14:05,248 INFO L860 garLoopResultBuilder]: At program point L175(lines 7 179) the Hoare annotation is: true [2021-10-21 19:14:05,248 INFO L857 garLoopResultBuilder]: For program point L109-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,248 INFO L857 garLoopResultBuilder]: For program point L134-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,248 INFO L857 garLoopResultBuilder]: For program point L101-1(lines 44 174) no Hoare annotation was computed. [2021-10-21 19:14:05,254 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:14:05,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:14:05 BoogieIcfgContainer [2021-10-21 19:14:05,263 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:14:05,264 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:14:05,264 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:14:05,264 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:14:05,265 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:13:51" (3/4) ... [2021-10-21 19:14:05,268 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:14:05,285 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-21 19:14:05,286 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:14:05,286 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:14:05,287 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:14:05,365 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:14:05,365 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:14:05,367 INFO L168 Benchmark]: Toolchain (without parser) took 15161.16 ms. Allocated memory was 115.3 MB in the beginning and 7.2 GB in the end (delta: 7.1 GB). Free memory was 74.8 MB in the beginning and 6.5 GB in the end (delta: -6.5 GB). Peak memory consumption was 583.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:14:05,368 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 115.3 MB. Free memory is still 90.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:14:05,369 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.92 ms. Allocated memory is still 115.3 MB. Free memory was 74.6 MB in the beginning and 88.1 MB in the end (delta: -13.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:14:05,371 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.70 ms. Allocated memory is still 115.3 MB. Free memory was 88.1 MB in the beginning and 86.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:14:05,371 INFO L168 Benchmark]: Boogie Preprocessor took 58.86 ms. Allocated memory is still 115.3 MB. Free memory was 86.4 MB in the beginning and 85.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:14:05,372 INFO L168 Benchmark]: RCFGBuilder took 574.82 ms. Allocated memory is still 115.3 MB. Free memory was 85.0 MB in the beginning and 72.4 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:14:05,372 INFO L168 Benchmark]: TraceAbstraction took 14063.26 ms. Allocated memory was 115.3 MB in the beginning and 7.2 GB in the end (delta: 7.1 GB). Free memory was 71.9 MB in the beginning and 6.5 GB in the end (delta: -6.5 GB). Peak memory consumption was 580.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:14:05,373 INFO L168 Benchmark]: Witness Printer took 101.26 ms. Allocated memory is still 7.2 GB. Free memory was 6.5 GB in the beginning and 6.5 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:14:05,377 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 115.3 MB. Free memory is still 90.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.92 ms. Allocated memory is still 115.3 MB. Free memory was 74.6 MB in the beginning and 88.1 MB in the end (delta: -13.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.70 ms. Allocated memory is still 115.3 MB. Free memory was 88.1 MB in the beginning and 86.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.86 ms. Allocated memory is still 115.3 MB. Free memory was 86.4 MB in the beginning and 85.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 574.82 ms. Allocated memory is still 115.3 MB. Free memory was 85.0 MB in the beginning and 72.4 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14063.26 ms. Allocated memory was 115.3 MB in the beginning and 7.2 GB in the end (delta: 7.1 GB). Free memory was 71.9 MB in the beginning and 6.5 GB in the end (delta: -6.5 GB). Peak memory consumption was 580.0 MB. Max. memory is 16.1 GB. * Witness Printer took 101.26 ms. Allocated memory is still 7.2 GB. Free memory was 6.5 GB in the beginning and 6.5 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 177]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13962.4ms, OverallIterations: 31, TraceHistogramMax: 1, EmptinessCheckTime: 279.0ms, AutomataDifference: 5657.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 21.3ms, InitialAbstractionConstructionTime: 15.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2753 SDtfs, 1400 SDslu, 1835 SDs, 0 SdLazy, 163 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 265.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31749occurred in iteration=29, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6044.5ms AutomataMinimizationTime, 31 MinimizatonAttempts, 6176 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 2057 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 6.1ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 3.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 118.3ms SsaConstructionTime, 394.3ms SatisfiabilityAnalysisTime, 950.5ms InterpolantComputationTime, 720 NumberOfCodeBlocks, 720 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 689 ConstructedInterpolants, 0 QuantifiedInterpolants, 1492 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-21 19:14:05,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf99a62-f429-4427-853d-d5c51563527a/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...