./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y --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 2860c4517fecc40ae408a746c354ae76653cd3eedc93173f87dfd23f49daad5e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:22:31,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:22:31,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:22:31,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:22:31,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:22:31,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:22:31,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:22:31,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:22:31,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:22:31,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:22:31,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:22:31,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:22:31,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:22:31,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:22:31,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:22:31,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:22:31,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:22:31,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:22:31,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:22:31,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:22:31,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:22:31,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:22:31,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:22:31,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:22:31,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:22:31,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:22:31,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:22:31,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:22:31,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:22:31,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:22:31,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:22:31,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:22:31,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:22:31,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:22:31,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:22:31,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:22:31,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:22:31,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:22:31,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:22:31,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:22:31,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:22:31,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:22:31,972 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:22:31,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:22:31,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:22:31,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:22:31,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:22:31,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:22:31,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:22:31,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:22:31,982 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:22:31,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:22:31,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:22:31,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:22:31,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:22:31,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:22:31,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:22:31,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:22:31,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:22:31,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:22:31,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:22:31,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:22:31,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:22:31,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:22:31,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:22:31,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:22:31,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:22:31,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:22:31,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:22:31,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:22:31,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:22:31,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:22:31,990 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:22:31,990 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:22:31,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:22:31,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:22:31,991 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_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2860c4517fecc40ae408a746c354ae76653cd3eedc93173f87dfd23f49daad5e [2021-11-13 18:22:32,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:22:32,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:22:32,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:22:32,274 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:22:32,275 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:22:32,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/eca-rers2012/Problem18_label50.c [2021-11-13 18:22:32,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/data/34def8182/1fc0fbdf49cf43728ff9a2c1f7b185fa/FLAGf529321d1 [2021-11-13 18:22:33,187 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:22:33,187 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/sv-benchmarks/c/eca-rers2012/Problem18_label50.c [2021-11-13 18:22:33,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/data/34def8182/1fc0fbdf49cf43728ff9a2c1f7b185fa/FLAGf529321d1 [2021-11-13 18:22:33,258 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/data/34def8182/1fc0fbdf49cf43728ff9a2c1f7b185fa [2021-11-13 18:22:33,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:22:33,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:22:33,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:22:33,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:22:33,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:22:33,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:22:33" (1/1) ... [2021-11-13 18:22:33,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728dd0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:33, skipping insertion in model container [2021-11-13 18:22:33,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:22:33" (1/1) ... [2021-11-13 18:22:33,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:22:33,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:22:33,750 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_f411daa2-842a-4309-9825-82c7efe5cdff/sv-benchmarks/c/eca-rers2012/Problem18_label50.c[6561,6574] [2021-11-13 18:22:34,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:22:34,747 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:22:34,798 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_f411daa2-842a-4309-9825-82c7efe5cdff/sv-benchmarks/c/eca-rers2012/Problem18_label50.c[6561,6574] [2021-11-13 18:22:35,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:22:35,342 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:22:35,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35 WrapperNode [2021-11-13 18:22:35,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:22:35,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:22:35,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:22:35,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:22:35,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (1/1) ... [2021-11-13 18:22:35,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (1/1) ... [2021-11-13 18:22:35,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:22:35,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:22:35,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:22:35,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:22:35,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (1/1) ... [2021-11-13 18:22:35,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (1/1) ... [2021-11-13 18:22:35,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (1/1) ... [2021-11-13 18:22:35,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (1/1) ... [2021-11-13 18:22:35,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (1/1) ... [2021-11-13 18:22:35,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (1/1) ... [2021-11-13 18:22:35,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (1/1) ... [2021-11-13 18:22:36,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:22:36,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:22:36,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:22:36,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:22:36,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (1/1) ... [2021-11-13 18:22:36,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:22:36,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:22:36,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:22:36,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:22:36,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:22:36,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:22:36,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:22:36,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:22:39,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:22:39,898 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:22:39,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:22:39 BoogieIcfgContainer [2021-11-13 18:22:39,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:22:39,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:22:39,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:22:39,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:22:39,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:22:33" (1/3) ... [2021-11-13 18:22:39,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca4503d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:22:39, skipping insertion in model container [2021-11-13 18:22:39,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:35" (2/3) ... [2021-11-13 18:22:39,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca4503d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:22:39, skipping insertion in model container [2021-11-13 18:22:39,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:22:39" (3/3) ... [2021-11-13 18:22:39,915 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label50.c [2021-11-13 18:22:39,924 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:22:39,925 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:22:39,998 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:22:40,006 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:22:40,006 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:22:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 18:22:40,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:40,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:40,054 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash -696204111, now seen corresponding path program 1 times [2021-11-13 18:22:40,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:40,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348044707] [2021-11-13 18:22:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:40,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:22:40,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:40,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348044707] [2021-11-13 18:22:40,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348044707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:40,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:40,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:22:40,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290458482] [2021-11-13 18:22:40,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:40,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:22:40,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:40,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:22:40,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:22:40,437 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:44,644 INFO L93 Difference]: Finished difference Result 2221 states and 4282 transitions. [2021-11-13 18:22:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:22:44,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-13 18:22:44,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:44,670 INFO L225 Difference]: With dead ends: 2221 [2021-11-13 18:22:44,670 INFO L226 Difference]: Without dead ends: 1384 [2021-11-13 18:22:44,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:22:44,680 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 732 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3112.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 2786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.06ms SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3932.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:44,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 487 Invalid, 2786 Unknown, 0 Unchecked, 42.06ms Time], IncrementalHoareTripleChecker [717 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 3932.45ms Time] [2021-11-13 18:22:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-11-13 18:22:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-11-13 18:22:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.5994215473608098) internal successors, (2212), 1383 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2212 transitions. [2021-11-13 18:22:44,815 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2212 transitions. Word has length 63 [2021-11-13 18:22:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:44,816 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2212 transitions. [2021-11-13 18:22:44,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2212 transitions. [2021-11-13 18:22:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 18:22:44,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:44,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:44,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:22:44,825 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:44,826 INFO L85 PathProgramCache]: Analyzing trace with hash 928891202, now seen corresponding path program 1 times [2021-11-13 18:22:44,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:44,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464474404] [2021-11-13 18:22:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:44,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:22:45,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:45,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464474404] [2021-11-13 18:22:45,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464474404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:45,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:45,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:22:45,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885217458] [2021-11-13 18:22:45,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:45,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:22:45,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:22:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:22:45,026 INFO L87 Difference]: Start difference. First operand 1384 states and 2212 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:48,529 INFO L93 Difference]: Finished difference Result 4146 states and 6631 transitions. [2021-11-13 18:22:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:22:48,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-11-13 18:22:48,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:48,549 INFO L225 Difference]: With dead ends: 4146 [2021-11-13 18:22:48,550 INFO L226 Difference]: Without dead ends: 2764 [2021-11-13 18:22:48,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:22:48,554 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 714 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2716.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.40ms SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3332.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:48,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 529 Invalid, 2619 Unknown, 0 Unchecked, 26.40ms Time], IncrementalHoareTripleChecker [918 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 3332.74ms Time] [2021-11-13 18:22:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-11-13 18:22:48,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2021-11-13 18:22:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 1.3503438291711907) internal successors, (3731), 2763 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3731 transitions. [2021-11-13 18:22:48,659 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3731 transitions. Word has length 128 [2021-11-13 18:22:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:48,663 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 3731 transitions. [2021-11-13 18:22:48,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3731 transitions. [2021-11-13 18:22:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-13 18:22:48,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:48,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:48,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:22:48,683 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1882009590, now seen corresponding path program 1 times [2021-11-13 18:22:48,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:48,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255592261] [2021-11-13 18:22:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:48,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:22:49,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:49,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255592261] [2021-11-13 18:22:49,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255592261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:49,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:49,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:22:49,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017374416] [2021-11-13 18:22:49,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:49,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:22:49,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:49,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:22:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:22:49,013 INFO L87 Difference]: Start difference. First operand 2764 states and 3731 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:53,402 INFO L93 Difference]: Finished difference Result 7596 states and 9794 transitions. [2021-11-13 18:22:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:22:53,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 246 [2021-11-13 18:22:53,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:53,431 INFO L225 Difference]: With dead ends: 7596 [2021-11-13 18:22:53,431 INFO L226 Difference]: Without dead ends: 4834 [2021-11-13 18:22:53,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:22:53,436 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 1872 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4348 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3449.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1872 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 4466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.73ms SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 4348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4201.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:53,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1872 Valid, 641 Invalid, 4466 Unknown, 0 Unchecked, 23.73ms Time], IncrementalHoareTripleChecker [118 Valid, 4348 Invalid, 0 Unknown, 0 Unchecked, 4201.48ms Time] [2021-11-13 18:22:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2021-11-13 18:22:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 4144. [2021-11-13 18:22:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.2698527636978034) internal successors, (5261), 4143 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5261 transitions. [2021-11-13 18:22:53,550 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5261 transitions. Word has length 246 [2021-11-13 18:22:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:53,550 INFO L470 AbstractCegarLoop]: Abstraction has 4144 states and 5261 transitions. [2021-11-13 18:22:53,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5261 transitions. [2021-11-13 18:22:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-13 18:22:53,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:53,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:53,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:22:53,559 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:53,560 INFO L85 PathProgramCache]: Analyzing trace with hash -906042740, now seen corresponding path program 1 times [2021-11-13 18:22:53,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:53,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591765440] [2021-11-13 18:22:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:53,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:22:53,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:53,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591765440] [2021-11-13 18:22:53,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591765440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:53,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:53,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:22:53,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829664481] [2021-11-13 18:22:53,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:53,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:22:53,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:53,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:22:53,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:22:53,779 INFO L87 Difference]: Start difference. First operand 4144 states and 5261 transitions. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:56,620 INFO L93 Difference]: Finished difference Result 12426 states and 15778 transitions. [2021-11-13 18:22:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:22:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 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 362 [2021-11-13 18:22:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:56,666 INFO L225 Difference]: With dead ends: 12426 [2021-11-13 18:22:56,667 INFO L226 Difference]: Without dead ends: 8284 [2021-11-13 18:22:56,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:22:56,675 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 643 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2176.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.09ms SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2689.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:56,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 824 Invalid, 2791 Unknown, 0 Unchecked, 10.09ms Time], IncrementalHoareTripleChecker [446 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 2689.12ms Time] [2021-11-13 18:22:56,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2021-11-13 18:22:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 8284. [2021-11-13 18:22:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8283 states have (on average 1.2472534106000241) internal successors, (10331), 8283 states have internal predecessors, (10331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 10331 transitions. [2021-11-13 18:22:56,897 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 10331 transitions. Word has length 362 [2021-11-13 18:22:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:56,901 INFO L470 AbstractCegarLoop]: Abstraction has 8284 states and 10331 transitions. [2021-11-13 18:22:56,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:22:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 10331 transitions. [2021-11-13 18:22:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-13 18:22:56,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:56,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:56,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:22:56,911 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:56,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1772964099, now seen corresponding path program 1 times [2021-11-13 18:22:56,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:56,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809121281] [2021-11-13 18:22:56,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:56,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:22:57,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:57,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809121281] [2021-11-13 18:22:57,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809121281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:22:57,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62038231] [2021-11-13 18:22:57,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:57,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:22:57,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:22:57,219 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:22:57,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:22:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:22:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:22:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:22:58,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:22:58,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62038231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:58,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:22:58,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-13 18:22:58,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711594073] [2021-11-13 18:22:58,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:58,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:22:58,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:58,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:22:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:22:58,548 INFO L87 Difference]: Start difference. First operand 8284 states and 10331 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:01,512 INFO L93 Difference]: Finished difference Result 24156 states and 30160 transitions. [2021-11-13 18:23:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 0 states have call successors, (0), 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 369 [2021-11-13 18:23:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:01,589 INFO L225 Difference]: With dead ends: 24156 [2021-11-13 18:23:01,589 INFO L226 Difference]: Without dead ends: 15874 [2021-11-13 18:23:01,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:01,605 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 391 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2255.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.18ms SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2813.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:01,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 550 Invalid, 2788 Unknown, 0 Unchecked, 8.18ms Time], IncrementalHoareTripleChecker [457 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 2813.47ms Time] [2021-11-13 18:23:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15874 states. [2021-11-13 18:23:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15874 to 12424. [2021-11-13 18:23:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 1.231023102310231) internal successors, (15293), 12423 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 15293 transitions. [2021-11-13 18:23:02,050 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 15293 transitions. Word has length 369 [2021-11-13 18:23:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:02,051 INFO L470 AbstractCegarLoop]: Abstraction has 12424 states and 15293 transitions. [2021-11-13 18:23:02,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 15293 transitions. [2021-11-13 18:23:02,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-13 18:23:02,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:02,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:02,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:02,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:02,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:02,300 INFO L85 PathProgramCache]: Analyzing trace with hash -717153331, now seen corresponding path program 1 times [2021-11-13 18:23:02,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:02,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958585436] [2021-11-13 18:23:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:02,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:02,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:02,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958585436] [2021-11-13 18:23:02,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958585436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:02,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:02,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:23:02,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935184348] [2021-11-13 18:23:02,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:02,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:02,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:02,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:02,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:02,595 INFO L87 Difference]: Start difference. First operand 12424 states and 15293 transitions. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:05,510 INFO L93 Difference]: Finished difference Result 31056 states and 38078 transitions. [2021-11-13 18:23:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:05,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 455 [2021-11-13 18:23:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:05,636 INFO L225 Difference]: With dead ends: 31056 [2021-11-13 18:23:05,636 INFO L226 Difference]: Without dead ends: 18634 [2021-11-13 18:23:05,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:05,655 INFO L933 BasicCegarLoop]: 1070 mSDtfsCounter, 600 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2232.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.51ms SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2742.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:05,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 1077 Invalid, 2555 Unknown, 0 Unchecked, 9.51ms Time], IncrementalHoareTripleChecker [354 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 2742.87ms Time] [2021-11-13 18:23:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18634 states. [2021-11-13 18:23:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18634 to 17944. [2021-11-13 18:23:05,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17944 states, 17943 states have (on average 1.1940589644986903) internal successors, (21425), 17943 states have internal predecessors, (21425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17944 states to 17944 states and 21425 transitions. [2021-11-13 18:23:06,006 INFO L78 Accepts]: Start accepts. Automaton has 17944 states and 21425 transitions. Word has length 455 [2021-11-13 18:23:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:06,008 INFO L470 AbstractCegarLoop]: Abstraction has 17944 states and 21425 transitions. [2021-11-13 18:23:06,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 17944 states and 21425 transitions. [2021-11-13 18:23:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-11-13 18:23:06,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:06,025 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:06,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:23:06,026 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:06,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:06,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1352129710, now seen corresponding path program 1 times [2021-11-13 18:23:06,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:06,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67295199] [2021-11-13 18:23:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:06,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-13 18:23:06,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:06,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67295199] [2021-11-13 18:23:06,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67295199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:06,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:06,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:23:06,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995982672] [2021-11-13 18:23:06,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:06,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:06,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:06,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:06,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:06,262 INFO L87 Difference]: Start difference. First operand 17944 states and 21425 transitions. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 2 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:08,765 INFO L93 Difference]: Finished difference Result 42786 states and 50792 transitions. [2021-11-13 18:23:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:08,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 2 states have internal predecessors, (364), 0 states have call successors, (0), 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 460 [2021-11-13 18:23:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:08,826 INFO L225 Difference]: With dead ends: 42786 [2021-11-13 18:23:08,826 INFO L226 Difference]: Without dead ends: 24844 [2021-11-13 18:23:08,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:08,849 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 499 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1827.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.71ms SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2340.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:08,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 109 Invalid, 2680 Unknown, 0 Unchecked, 6.71ms Time], IncrementalHoareTripleChecker [746 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 2340.02ms Time] [2021-11-13 18:23:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2021-11-13 18:23:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24844. [2021-11-13 18:23:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24844 states, 24843 states have (on average 1.1503039085456668) internal successors, (28577), 24843 states have internal predecessors, (28577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24844 states to 24844 states and 28577 transitions. [2021-11-13 18:23:09,296 INFO L78 Accepts]: Start accepts. Automaton has 24844 states and 28577 transitions. Word has length 460 [2021-11-13 18:23:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:09,297 INFO L470 AbstractCegarLoop]: Abstraction has 24844 states and 28577 transitions. [2021-11-13 18:23:09,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 2 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 24844 states and 28577 transitions. [2021-11-13 18:23:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-11-13 18:23:09,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:09,304 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:09,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:23:09,305 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:09,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:09,306 INFO L85 PathProgramCache]: Analyzing trace with hash 610570492, now seen corresponding path program 1 times [2021-11-13 18:23:09,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:09,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297568889] [2021-11-13 18:23:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:09,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 18:23:09,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:09,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297568889] [2021-11-13 18:23:09,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297568889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:09,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:09,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:23:09,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185686709] [2021-11-13 18:23:09,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:09,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:09,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:09,607 INFO L87 Difference]: Start difference. First operand 24844 states and 28577 transitions. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:12,580 INFO L93 Difference]: Finished difference Result 53826 states and 62398 transitions. [2021-11-13 18:23:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 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 462 [2021-11-13 18:23:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:12,654 INFO L225 Difference]: With dead ends: 53826 [2021-11-13 18:23:12,654 INFO L226 Difference]: Without dead ends: 28984 [2021-11-13 18:23:12,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:12,838 INFO L933 BasicCegarLoop]: 1292 mSDtfsCounter, 641 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2237.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.34ms SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2744.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:12,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 1299 Invalid, 2713 Unknown, 0 Unchecked, 8.34ms Time], IncrementalHoareTripleChecker [755 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 2744.46ms Time] [2021-11-13 18:23:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28984 states. [2021-11-13 18:23:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28984 to 27604. [2021-11-13 18:23:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27604 states, 27603 states have (on average 1.143317755316451) internal successors, (31559), 27603 states have internal predecessors, (31559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27604 states to 27604 states and 31559 transitions. [2021-11-13 18:23:13,336 INFO L78 Accepts]: Start accepts. Automaton has 27604 states and 31559 transitions. Word has length 462 [2021-11-13 18:23:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:13,338 INFO L470 AbstractCegarLoop]: Abstraction has 27604 states and 31559 transitions. [2021-11-13 18:23:13,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 27604 states and 31559 transitions. [2021-11-13 18:23:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-11-13 18:23:13,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:13,351 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:13,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:23:13,351 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash 842142857, now seen corresponding path program 1 times [2021-11-13 18:23:13,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:13,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647660622] [2021-11-13 18:23:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:13,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-13 18:23:13,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:13,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647660622] [2021-11-13 18:23:13,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647660622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:13,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:13,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:23:13,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405053934] [2021-11-13 18:23:13,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:13,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:13,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:13,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:13,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:13,712 INFO L87 Difference]: Start difference. First operand 27604 states and 31559 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:17,005 INFO L93 Difference]: Finished difference Result 63486 states and 73402 transitions. [2021-11-13 18:23:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:17,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 552 [2021-11-13 18:23:17,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:17,064 INFO L225 Difference]: With dead ends: 63486 [2021-11-13 18:23:17,065 INFO L226 Difference]: Without dead ends: 35884 [2021-11-13 18:23:17,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:17,088 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 731 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 964 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2450.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.92ms SdHoareTripleChecker+Time, 964 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3012.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:17,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 123 Invalid, 2903 Unknown, 0 Unchecked, 8.92ms Time], IncrementalHoareTripleChecker [964 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 3012.18ms Time] [2021-11-13 18:23:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35884 states. [2021-11-13 18:23:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35884 to 32434. [2021-11-13 18:23:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32434 states, 32433 states have (on average 1.1660037616008387) internal successors, (37817), 32433 states have internal predecessors, (37817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32434 states to 32434 states and 37817 transitions. [2021-11-13 18:23:17,729 INFO L78 Accepts]: Start accepts. Automaton has 32434 states and 37817 transitions. Word has length 552 [2021-11-13 18:23:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:17,731 INFO L470 AbstractCegarLoop]: Abstraction has 32434 states and 37817 transitions. [2021-11-13 18:23:17,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 32434 states and 37817 transitions. [2021-11-13 18:23:17,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2021-11-13 18:23:17,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:17,750 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:17,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:23:17,751 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash -755155955, now seen corresponding path program 1 times [2021-11-13 18:23:17,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:17,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236907996] [2021-11-13 18:23:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:17,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 645 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-13 18:23:17,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:17,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236907996] [2021-11-13 18:23:17,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236907996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:17,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:17,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:23:17,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379975875] [2021-11-13 18:23:17,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:17,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:23:17,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:23:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:23:17,997 INFO L87 Difference]: Start difference. First operand 32434 states and 37817 transitions. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:20,888 INFO L93 Difference]: Finished difference Result 66989 states and 77791 transitions. [2021-11-13 18:23:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:23:20,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 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 630 [2021-11-13 18:23:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:21,106 INFO L225 Difference]: With dead ends: 66989 [2021-11-13 18:23:21,107 INFO L226 Difference]: Without dead ends: 34504 [2021-11-13 18:23:21,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:23:21,121 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 515 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3037 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2174.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 3239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.44ms SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 3037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2649.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:21,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 640 Invalid, 3239 Unknown, 0 Unchecked, 6.44ms Time], IncrementalHoareTripleChecker [202 Valid, 3037 Invalid, 0 Unknown, 0 Unchecked, 2649.39ms Time] [2021-11-13 18:23:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34504 states. [2021-11-13 18:23:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34504 to 34504. [2021-11-13 18:23:21,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34504 states, 34503 states have (on average 1.119178042489059) internal successors, (38615), 34503 states have internal predecessors, (38615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34504 states to 34504 states and 38615 transitions. [2021-11-13 18:23:21,792 INFO L78 Accepts]: Start accepts. Automaton has 34504 states and 38615 transitions. Word has length 630 [2021-11-13 18:23:21,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:21,793 INFO L470 AbstractCegarLoop]: Abstraction has 34504 states and 38615 transitions. [2021-11-13 18:23:21,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 34504 states and 38615 transitions. [2021-11-13 18:23:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2021-11-13 18:23:21,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:21,813 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:21,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:23:21,814 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:21,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1020442453, now seen corresponding path program 1 times [2021-11-13 18:23:21,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:21,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086193425] [2021-11-13 18:23:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:21,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 396 proven. 278 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 18:23:22,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:22,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086193425] [2021-11-13 18:23:22,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086193425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:22,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567688209] [2021-11-13 18:23:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:22,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:22,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:22,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:23:22,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:23:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:22,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:23:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 523 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-13 18:23:23,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:23:23,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567688209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:23,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:23:23,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-13 18:23:23,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755084020] [2021-11-13 18:23:23,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:23,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:23,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:23:23,673 INFO L87 Difference]: Start difference. First operand 34504 states and 38615 transitions. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:26,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:26,003 INFO L93 Difference]: Finished difference Result 79356 states and 90016 transitions. [2021-11-13 18:23:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:26,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 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 643 [2021-11-13 18:23:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:26,065 INFO L225 Difference]: With dead ends: 79356 [2021-11-13 18:23:26,065 INFO L226 Difference]: Without dead ends: 44854 [2021-11-13 18:23:26,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:23:26,091 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 652 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1649.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.17ms SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2058.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:26,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 213 Invalid, 2342 Unknown, 0 Unchecked, 5.17ms Time], IncrementalHoareTripleChecker [498 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 2058.87ms Time] [2021-11-13 18:23:26,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44854 states. [2021-11-13 18:23:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44854 to 44854. [2021-11-13 18:23:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44854 states, 44853 states have (on average 1.1209060709428578) internal successors, (50276), 44853 states have internal predecessors, (50276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44854 states to 44854 states and 50276 transitions. [2021-11-13 18:23:26,925 INFO L78 Accepts]: Start accepts. Automaton has 44854 states and 50276 transitions. Word has length 643 [2021-11-13 18:23:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:26,926 INFO L470 AbstractCegarLoop]: Abstraction has 44854 states and 50276 transitions. [2021-11-13 18:23:26,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 44854 states and 50276 transitions. [2021-11-13 18:23:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2021-11-13 18:23:26,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:26,949 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:26,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:27,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:27,163 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:27,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1221889926, now seen corresponding path program 1 times [2021-11-13 18:23:27,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:27,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196293909] [2021-11-13 18:23:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:27,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 636 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-13 18:23:27,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:27,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196293909] [2021-11-13 18:23:27,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196293909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:27,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:27,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:27,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920569187] [2021-11-13 18:23:27,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:27,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:27,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:27,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:27,632 INFO L87 Difference]: Start difference. First operand 44854 states and 50276 transitions. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:30,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:30,816 INFO L93 Difference]: Finished difference Result 103069 states and 115571 transitions. [2021-11-13 18:23:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:23:30,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 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 685 [2021-11-13 18:23:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:30,912 INFO L225 Difference]: With dead ends: 103069 [2021-11-13 18:23:30,912 INFO L226 Difference]: Without dead ends: 52697 [2021-11-13 18:23:30,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:23:30,954 INFO L933 BasicCegarLoop]: 1099 mSDtfsCounter, 1412 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 1059 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2221.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 3511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.55ms SdHoareTripleChecker+Time, 1059 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2710.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:30,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 1112 Invalid, 3511 Unknown, 0 Unchecked, 11.55ms Time], IncrementalHoareTripleChecker [1059 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 2710.87ms Time] [2021-11-13 18:23:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52697 states. [2021-11-13 18:23:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52697 to 50374. [2021-11-13 18:23:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50374 states, 50373 states have (on average 1.0683898120024615) internal successors, (53818), 50373 states have internal predecessors, (53818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50374 states to 50374 states and 53818 transitions. [2021-11-13 18:23:31,726 INFO L78 Accepts]: Start accepts. Automaton has 50374 states and 53818 transitions. Word has length 685 [2021-11-13 18:23:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:31,727 INFO L470 AbstractCegarLoop]: Abstraction has 50374 states and 53818 transitions. [2021-11-13 18:23:31,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 50374 states and 53818 transitions. [2021-11-13 18:23:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2021-11-13 18:23:31,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:31,747 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:31,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:23:31,748 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:31,749 INFO L85 PathProgramCache]: Analyzing trace with hash -506639887, now seen corresponding path program 1 times [2021-11-13 18:23:31,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:31,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360100238] [2021-11-13 18:23:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:31,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-11-13 18:23:32,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:32,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360100238] [2021-11-13 18:23:32,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360100238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:32,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:32,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:23:32,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377167578] [2021-11-13 18:23:32,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:32,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:32,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:32,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:32,291 INFO L87 Difference]: Start difference. First operand 50374 states and 53818 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:34,461 INFO L93 Difference]: Finished difference Result 100746 states and 107634 transitions. [2021-11-13 18:23:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:34,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 696 [2021-11-13 18:23:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:34,540 INFO L225 Difference]: With dead ends: 100746 [2021-11-13 18:23:34,540 INFO L226 Difference]: Without dead ends: 50374 [2021-11-13 18:23:34,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:34,563 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 734 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1529.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.97ms SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1850.96ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:34,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 746 Invalid, 1853 Unknown, 0 Unchecked, 5.97ms Time], IncrementalHoareTripleChecker [157 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 1850.96ms Time] [2021-11-13 18:23:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50374 states. [2021-11-13 18:23:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50374 to 50374. [2021-11-13 18:23:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50374 states, 50373 states have (on average 1.0597740853234867) internal successors, (53384), 50373 states have internal predecessors, (53384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50374 states to 50374 states and 53384 transitions. [2021-11-13 18:23:35,275 INFO L78 Accepts]: Start accepts. Automaton has 50374 states and 53384 transitions. Word has length 696 [2021-11-13 18:23:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:35,276 INFO L470 AbstractCegarLoop]: Abstraction has 50374 states and 53384 transitions. [2021-11-13 18:23:35,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 50374 states and 53384 transitions. [2021-11-13 18:23:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1014 [2021-11-13 18:23:35,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:35,324 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:35,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:23:35,324 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:35,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1070175615, now seen corresponding path program 1 times [2021-11-13 18:23:35,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:35,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104401076] [2021-11-13 18:23:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:35,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 860 proven. 0 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2021-11-13 18:23:35,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:35,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104401076] [2021-11-13 18:23:35,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104401076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:35,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:35,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:23:35,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412705720] [2021-11-13 18:23:35,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:35,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:35,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:35,957 INFO L87 Difference]: Start difference. First operand 50374 states and 53384 transitions. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:38,335 INFO L93 Difference]: Finished difference Result 124206 states and 132022 transitions. [2021-11-13 18:23:38,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:38,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 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 1013 [2021-11-13 18:23:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:38,412 INFO L225 Difference]: With dead ends: 124206 [2021-11-13 18:23:38,412 INFO L226 Difference]: Without dead ends: 73834 [2021-11-13 18:23:38,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:38,436 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 617 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1648.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.53ms SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1994.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:38,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 206 Invalid, 2036 Unknown, 0 Unchecked, 5.53ms Time], IncrementalHoareTripleChecker [280 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 1994.71ms Time] [2021-11-13 18:23:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73834 states. [2021-11-13 18:23:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73834 to 73144. [2021-11-13 18:23:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73144 states, 73143 states have (on average 1.0555350477831098) internal successors, (77205), 73143 states have internal predecessors, (77205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73144 states to 73144 states and 77205 transitions. [2021-11-13 18:23:39,672 INFO L78 Accepts]: Start accepts. Automaton has 73144 states and 77205 transitions. Word has length 1013 [2021-11-13 18:23:39,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:39,673 INFO L470 AbstractCegarLoop]: Abstraction has 73144 states and 77205 transitions. [2021-11-13 18:23:39,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:39,673 INFO L276 IsEmpty]: Start isEmpty. Operand 73144 states and 77205 transitions. [2021-11-13 18:23:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1093 [2021-11-13 18:23:39,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:39,751 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:39,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:23:39,751 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1440553033, now seen corresponding path program 1 times [2021-11-13 18:23:39,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:39,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144696479] [2021-11-13 18:23:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:39,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 996 proven. 0 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2021-11-13 18:23:40,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:40,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144696479] [2021-11-13 18:23:40,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144696479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:40,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:40,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:23:40,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317438574] [2021-11-13 18:23:40,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:40,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:40,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:40,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:40,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:40,080 INFO L87 Difference]: Start difference. First operand 73144 states and 77205 transitions. Second operand has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:42,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:42,431 INFO L93 Difference]: Finished difference Result 146286 states and 154408 transitions. [2021-11-13 18:23:42,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:42,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 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 1092 [2021-11-13 18:23:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:42,505 INFO L225 Difference]: With dead ends: 146286 [2021-11-13 18:23:42,505 INFO L226 Difference]: Without dead ends: 73144 [2021-11-13 18:23:42,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:42,529 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 629 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1626.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.96ms SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1978.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:42,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 197 Invalid, 2002 Unknown, 0 Unchecked, 4.96ms Time], IncrementalHoareTripleChecker [216 Valid, 1786 Invalid, 0 Unknown, 0 Unchecked, 1978.14ms Time] [2021-11-13 18:23:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73144 states. [2021-11-13 18:23:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73144 to 73144. [2021-11-13 18:23:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73144 states, 73143 states have (on average 1.0490135761453592) internal successors, (76728), 73143 states have internal predecessors, (76728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73144 states to 73144 states and 76728 transitions. [2021-11-13 18:23:43,615 INFO L78 Accepts]: Start accepts. Automaton has 73144 states and 76728 transitions. Word has length 1092 [2021-11-13 18:23:43,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:43,616 INFO L470 AbstractCegarLoop]: Abstraction has 73144 states and 76728 transitions. [2021-11-13 18:23:43,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 73144 states and 76728 transitions. [2021-11-13 18:23:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1668 [2021-11-13 18:23:43,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:43,692 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:43,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:23:43,693 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:43,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1467632712, now seen corresponding path program 1 times [2021-11-13 18:23:43,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:43,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007668407] [2021-11-13 18:23:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:43,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2955 backedges. 1974 proven. 319 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2021-11-13 18:23:45,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:45,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007668407] [2021-11-13 18:23:45,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007668407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:45,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013014135] [2021-11-13 18:23:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:45,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:45,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:23:45,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:23:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:45,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:23:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2955 backedges. 1994 proven. 0 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-13 18:23:49,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:23:49,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013014135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:49,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:23:49,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-13 18:23:49,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637233053] [2021-11-13 18:23:49,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:49,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:49,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:49,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:49,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:23:49,128 INFO L87 Difference]: Start difference. First operand 73144 states and 76728 transitions. Second operand has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:51,574 INFO L93 Difference]: Finished difference Result 160086 states and 168310 transitions. [2021-11-13 18:23:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 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 1667 [2021-11-13 18:23:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:51,683 INFO L225 Difference]: With dead ends: 160086 [2021-11-13 18:23:51,684 INFO L226 Difference]: Without dead ends: 86944 [2021-11-13 18:23:51,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1676 GetRequests, 1669 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:23:51,896 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 608 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1541.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.54ms SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1970.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:51,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 984 Invalid, 1973 Unknown, 0 Unchecked, 5.54ms Time], IncrementalHoareTripleChecker [185 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 1970.58ms Time] [2021-11-13 18:23:51,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86944 states. [2021-11-13 18:23:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86944 to 86944. [2021-11-13 18:23:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86944 states, 86943 states have (on average 1.0459841505354082) internal successors, (90941), 86943 states have internal predecessors, (90941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86944 states to 86944 states and 90941 transitions. [2021-11-13 18:23:53,174 INFO L78 Accepts]: Start accepts. Automaton has 86944 states and 90941 transitions. Word has length 1667 [2021-11-13 18:23:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:53,175 INFO L470 AbstractCegarLoop]: Abstraction has 86944 states and 90941 transitions. [2021-11-13 18:23:53,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 86944 states and 90941 transitions. [2021-11-13 18:23:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2021-11-13 18:23:53,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:53,271 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:53,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:53,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f411daa2-842a-4309-9825-82c7efe5cdff/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:53,479 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:53,480 INFO L85 PathProgramCache]: Analyzing trace with hash -957661622, now seen corresponding path program 1 times [2021-11-13 18:23:53,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:53,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585565098] [2021-11-13 18:23:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:53,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3039 backedges. 2273 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-11-13 18:23:54,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:54,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585565098] [2021-11-13 18:23:54,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585565098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:54,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:54,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:23:54,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391370289] [2021-11-13 18:23:54,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:54,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:23:54,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:54,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:23:54,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:23:54,515 INFO L87 Difference]: Start difference. First operand 86944 states and 90941 transitions. Second operand has 4 states, 4 states have (on average 281.25) internal successors, (1125), 4 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:59,264 INFO L93 Difference]: Finished difference Result 209076 states and 219264 transitions. [2021-11-13 18:23:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:23:59,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 281.25) internal successors, (1125), 4 states have internal predecessors, (1125), 0 states have call successors, (0), 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 1688 [2021-11-13 18:23:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:59,770 INFO L225 Difference]: With dead ends: 209076 [2021-11-13 18:23:59,770 INFO L226 Difference]: Without dead ends: 122134 [2021-11-13 18:23:59,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:23:59,810 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 1241 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3029.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 4655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.12ms SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4014.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:59,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 979 Invalid, 4655 Unknown, 0 Unchecked, 12.12ms Time], IncrementalHoareTripleChecker [353 Valid, 4302 Invalid, 0 Unknown, 0 Unchecked, 4014.85ms Time] [2021-11-13 18:23:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122134 states. [2021-11-13 18:24:01,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122134 to 120064. [2021-11-13 18:24:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120064 states, 120063 states have (on average 1.0398707345310378) internal successors, (124850), 120063 states have internal predecessors, (124850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120064 states to 120064 states and 124850 transitions. [2021-11-13 18:24:01,415 INFO L78 Accepts]: Start accepts. Automaton has 120064 states and 124850 transitions. Word has length 1688 [2021-11-13 18:24:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:01,417 INFO L470 AbstractCegarLoop]: Abstraction has 120064 states and 124850 transitions. [2021-11-13 18:24:01,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 281.25) internal successors, (1125), 4 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand 120064 states and 124850 transitions. [2021-11-13 18:24:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2021-11-13 18:24:01,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:01,468 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:01,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:24:01,469 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:24:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash -498332695, now seen corresponding path program 1 times [2021-11-13 18:24:01,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:01,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408790302] [2021-11-13 18:24:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:01,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1972 proven. 0 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2021-11-13 18:24:03,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:03,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408790302] [2021-11-13 18:24:03,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408790302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:03,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:03,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:24:03,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562395235] [2021-11-13 18:24:03,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:03,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:24:03,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:03,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:24:03,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:24:03,043 INFO L87 Difference]: Start difference. First operand 120064 states and 124850 transitions. Second operand has 4 states, 4 states have (on average 267.5) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:07,384 INFO L93 Difference]: Finished difference Result 241506 states and 251089 transitions. [2021-11-13 18:24:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:24:07,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 267.5) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 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 1689 [2021-11-13 18:24:07,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:07,530 INFO L225 Difference]: With dead ends: 241506 [2021-11-13 18:24:07,530 INFO L226 Difference]: Without dead ends: 121444 [2021-11-13 18:24:07,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:24:07,562 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 975 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2677 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2562.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.91ms SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3188.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:07,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 73 Invalid, 3053 Unknown, 0 Unchecked, 8.91ms Time], IncrementalHoareTripleChecker [376 Valid, 2677 Invalid, 0 Unknown, 0 Unchecked, 3188.97ms Time] [2021-11-13 18:24:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121444 states. [2021-11-13 18:24:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121444 to 120064. [2021-11-13 18:24:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120064 states, 120063 states have (on average 1.0369306114289998) internal successors, (124497), 120063 states have internal predecessors, (124497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120064 states to 120064 states and 124497 transitions. [2021-11-13 18:24:09,258 INFO L78 Accepts]: Start accepts. Automaton has 120064 states and 124497 transitions. Word has length 1689 [2021-11-13 18:24:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:09,259 INFO L470 AbstractCegarLoop]: Abstraction has 120064 states and 124497 transitions. [2021-11-13 18:24:09,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 267.5) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 120064 states and 124497 transitions. [2021-11-13 18:24:09,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1822 [2021-11-13 18:24:09,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:09,889 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:09,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:24:09,889 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:24:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1467640742, now seen corresponding path program 1 times [2021-11-13 18:24:09,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:09,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95357738] [2021-11-13 18:24:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:09,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 1956 proven. 0 refuted. 0 times theorem prover too weak. 1621 trivial. 0 not checked. [2021-11-13 18:24:10,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:10,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95357738] [2021-11-13 18:24:10,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95357738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:10,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:10,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:24:10,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161383232] [2021-11-13 18:24:10,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:10,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:24:10,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:10,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:24:10,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:24:10,975 INFO L87 Difference]: Start difference. First operand 120064 states and 124497 transitions. Second operand has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:13,905 INFO L93 Difference]: Finished difference Result 240816 states and 249684 transitions. [2021-11-13 18:24:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:24:13,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 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 1821 [2021-11-13 18:24:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:14,045 INFO L225 Difference]: With dead ends: 240816 [2021-11-13 18:24:14,046 INFO L226 Difference]: Without dead ends: 120754 [2021-11-13 18:24:14,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:24:14,093 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 625 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1550.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.40ms SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1952.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:14,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 945 Invalid, 1972 Unknown, 0 Unchecked, 5.40ms Time], IncrementalHoareTripleChecker [190 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 1952.25ms Time] [2021-11-13 18:24:14,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120754 states. [2021-11-13 18:24:15,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120754 to 117994. [2021-11-13 18:24:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117994 states, 117993 states have (on average 1.031493393675896) internal successors, (121709), 117993 states have internal predecessors, (121709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117994 states to 117994 states and 121709 transitions. [2021-11-13 18:24:15,925 INFO L78 Accepts]: Start accepts. Automaton has 117994 states and 121709 transitions. Word has length 1821 [2021-11-13 18:24:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:15,927 INFO L470 AbstractCegarLoop]: Abstraction has 117994 states and 121709 transitions. [2021-11-13 18:24:15,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 117994 states and 121709 transitions. [2021-11-13 18:24:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1848 [2021-11-13 18:24:15,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:15,977 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:15,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:24:15,977 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:24:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2006931382, now seen corresponding path program 1 times [2021-11-13 18:24:15,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:15,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555249813] [2021-11-13 18:24:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:15,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3548 backedges. 1694 proven. 0 refuted. 0 times theorem prover too weak. 1854 trivial. 0 not checked. [2021-11-13 18:24:17,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:17,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555249813] [2021-11-13 18:24:17,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555249813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:17,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:17,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:24:17,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258971446] [2021-11-13 18:24:17,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:17,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:24:17,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:17,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:24:17,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:24:17,679 INFO L87 Difference]: Start difference. First operand 117994 states and 121709 transitions. Second operand has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:20,874 INFO L93 Difference]: Finished difference Result 249786 states and 257911 transitions. [2021-11-13 18:24:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:24:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 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 1847 [2021-11-13 18:24:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:21,014 INFO L225 Difference]: With dead ends: 249786 [2021-11-13 18:24:21,014 INFO L226 Difference]: Without dead ends: 131794 [2021-11-13 18:24:21,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:24:21,047 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 304 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1767.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.86ms SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2196.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:21,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 820 Invalid, 2054 Unknown, 0 Unchecked, 5.86ms Time], IncrementalHoareTripleChecker [373 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 2196.95ms Time] [2021-11-13 18:24:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131794 states. [2021-11-13 18:24:22,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131794 to 127654. [2021-11-13 18:24:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127654 states, 127653 states have (on average 1.0306534119840505) internal successors, (131566), 127653 states have internal predecessors, (131566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127654 states to 127654 states and 131566 transitions. [2021-11-13 18:24:23,086 INFO L78 Accepts]: Start accepts. Automaton has 127654 states and 131566 transitions. Word has length 1847 [2021-11-13 18:24:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:23,088 INFO L470 AbstractCegarLoop]: Abstraction has 127654 states and 131566 transitions. [2021-11-13 18:24:23,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 127654 states and 131566 transitions. [2021-11-13 18:24:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1971 [2021-11-13 18:24:23,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:23,201 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:23,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 18:24:23,201 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:24:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:23,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1834861578, now seen corresponding path program 1 times [2021-11-13 18:24:23,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:23,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217577135] [2021-11-13 18:24:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:23,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4359 backedges. 1878 proven. 0 refuted. 0 times theorem prover too weak. 2481 trivial. 0 not checked. [2021-11-13 18:24:25,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:25,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217577135] [2021-11-13 18:24:25,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217577135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:25,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:25,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:24:25,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710735701] [2021-11-13 18:24:25,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:25,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:24:25,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:25,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:24:25,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:24:25,077 INFO L87 Difference]: Start difference. First operand 127654 states and 131566 transitions. Second operand has 3 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:28,136 INFO L93 Difference]: Finished difference Result 255306 states and 263130 transitions. [2021-11-13 18:24:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:24:28,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 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 1970 [2021-11-13 18:24:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:28,288 INFO L225 Difference]: With dead ends: 255306 [2021-11-13 18:24:28,288 INFO L226 Difference]: Without dead ends: 127654 [2021-11-13 18:24:28,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:24:28,326 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 313 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1581.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.97ms SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1993.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:28,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 72 Invalid, 1915 Unknown, 0 Unchecked, 4.97ms Time], IncrementalHoareTripleChecker [240 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 1993.99ms Time] [2021-11-13 18:24:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127654 states.