./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label49.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_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/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_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label49.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/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_996f9b6d-cfa6-4211-98f8-177310d45901/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 dec1bbc02769dd31e26f469fb506a4ddb52de0bafeec9822b4b5ac4641b246bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:17:42,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:17:42,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:17:42,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:17:42,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:17:42,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:17:42,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:17:42,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:17:42,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:17:42,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:17:42,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:17:42,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:17:42,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:17:42,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:17:42,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:17:42,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:17:42,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:17:42,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:17:42,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:17:42,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:17:42,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:17:42,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:17:42,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:17:42,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:17:42,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:17:42,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:17:42,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:17:42,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:17:42,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:17:42,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:17:42,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:17:42,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:17:42,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:17:42,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:17:42,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:17:42,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:17:42,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:17:42,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:17:42,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:17:42,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:17:42,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:17:42,816 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:17:42,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:17:42,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:17:42,880 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:17:42,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:17:42,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:17:42,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:17:42,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:17:42,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:17:42,891 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:17:42,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:17:42,893 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:17:42,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:17:42,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:17:42,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:17:42,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:17:42,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:17:42,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:17:42,895 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:17:42,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:17:42,895 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:17:42,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:17:42,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:17:42,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:17:42,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:17:42,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:17:42,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:17:42,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:17:42,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:17:42,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:17:42,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:17:42,901 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:17:42,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:17:42,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:17:42,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:17:42,902 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_996f9b6d-cfa6-4211-98f8-177310d45901/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dec1bbc02769dd31e26f469fb506a4ddb52de0bafeec9822b4b5ac4641b246bd [2021-11-13 18:17:43,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:17:43,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:17:43,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:17:43,276 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:17:43,277 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:17:43,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/eca-rers2012/Problem13_label49.c [2021-11-13 18:17:43,357 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/data/6e9c340c6/c595a86a3a1c4ad8b56b7b2dbe044cf8/FLAGf5ae9da0d [2021-11-13 18:17:44,321 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:17:44,323 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/sv-benchmarks/c/eca-rers2012/Problem13_label49.c [2021-11-13 18:17:44,368 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/data/6e9c340c6/c595a86a3a1c4ad8b56b7b2dbe044cf8/FLAGf5ae9da0d [2021-11-13 18:17:44,762 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/data/6e9c340c6/c595a86a3a1c4ad8b56b7b2dbe044cf8 [2021-11-13 18:17:44,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:17:44,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:17:44,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:17:44,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:17:44,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:17:44,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:17:44" (1/1) ... [2021-11-13 18:17:44,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aeed1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:44, skipping insertion in model container [2021-11-13 18:17:44,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:17:44" (1/1) ... [2021-11-13 18:17:44,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:17:44,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:17:45,400 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_996f9b6d-cfa6-4211-98f8-177310d45901/sv-benchmarks/c/eca-rers2012/Problem13_label49.c[8258,8271] [2021-11-13 18:17:46,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:17:46,707 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:17:46,776 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_996f9b6d-cfa6-4211-98f8-177310d45901/sv-benchmarks/c/eca-rers2012/Problem13_label49.c[8258,8271] [2021-11-13 18:17:47,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:17:47,543 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:17:47,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47 WrapperNode [2021-11-13 18:17:47,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:17:47,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:17:47,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:17:47,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:17:47,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (1/1) ... [2021-11-13 18:17:47,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (1/1) ... [2021-11-13 18:17:48,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:17:48,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:17:48,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:17:48,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:17:48,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (1/1) ... [2021-11-13 18:17:48,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (1/1) ... [2021-11-13 18:17:48,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (1/1) ... [2021-11-13 18:17:48,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (1/1) ... [2021-11-13 18:17:49,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (1/1) ... [2021-11-13 18:17:49,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (1/1) ... [2021-11-13 18:17:49,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (1/1) ... [2021-11-13 18:17:49,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:17:49,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:17:49,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:17:49,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:17:49,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (1/1) ... [2021-11-13 18:17:49,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:17:49,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:17:49,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:17:49,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:17:49,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:17:49,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:17:49,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:17:49,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:17:56,101 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:17:56,102 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:17:56,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:17:56 BoogieIcfgContainer [2021-11-13 18:17:56,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:17:56,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:17:56,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:17:56,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:17:56,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:17:44" (1/3) ... [2021-11-13 18:17:56,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c0e023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:17:56, skipping insertion in model container [2021-11-13 18:17:56,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:47" (2/3) ... [2021-11-13 18:17:56,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c0e023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:17:56, skipping insertion in model container [2021-11-13 18:17:56,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:17:56" (3/3) ... [2021-11-13 18:17:56,119 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label49.c [2021-11-13 18:17:56,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:17:56,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:17:56,204 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:17:56,213 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 18:17:56,214 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:17:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 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 18:17:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:17:56,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:17:56,269 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] [2021-11-13 18:17:56,270 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:17:56,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:17:56,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2074400678, now seen corresponding path program 1 times [2021-11-13 18:17:56,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:17:56,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343237101] [2021-11-13 18:17:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:17:56,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:17:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:56,644 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 18:17:56,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:17:56,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343237101] [2021-11-13 18:17:56,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343237101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:17:56,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:17:56,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:17:56,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421178827] [2021-11-13 18:17:56,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:17:56,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:17:56,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:17:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:17:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:17:56,716 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:18:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:02,653 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-11-13 18:18:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:18:02,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-13 18:18:02,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:02,687 INFO L225 Difference]: With dead ends: 3035 [2021-11-13 18:18:02,688 INFO L226 Difference]: Without dead ends: 1873 [2021-11-13 18:18:02,698 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 18:18:02,702 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 847 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4524.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.07ms SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5626.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:02,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 52.07ms Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 5626.59ms Time] [2021-11-13 18:18:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-11-13 18:18:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-11-13 18:18:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 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 18:18:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-11-13 18:18:02,878 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 58 [2021-11-13 18:18:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:02,880 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-11-13 18:18:02,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:18:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-11-13 18:18:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 18:18:02,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:02,894 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, 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 18:18:02,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:18:02,894 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash 463715077, now seen corresponding path program 1 times [2021-11-13 18:18:02,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:02,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212173824] [2021-11-13 18:18:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:02,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:03,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:03,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212173824] [2021-11-13 18:18:03,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212173824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:03,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:03,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:18:03,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125930399] [2021-11-13 18:18:03,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:03,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:18:03,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:18:03,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:18:03,253 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 18:18:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:09,188 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2021-11-13 18:18:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:18:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-11-13 18:18:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:09,212 INFO L225 Difference]: With dead ends: 5317 [2021-11-13 18:18:09,212 INFO L226 Difference]: Without dead ends: 3460 [2021-11-13 18:18:09,222 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 18:18:09,224 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4763.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.55ms SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5671.82ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:09,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1192 Invalid, 3279 Unknown, 0 Unchecked, 46.55ms Time], IncrementalHoareTripleChecker [877 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 5671.82ms Time] [2021-11-13 18:18:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-11-13 18:18:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2021-11-13 18:18:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 0 states have call successors, (0), 0 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 18:18:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2021-11-13 18:18:09,353 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 130 [2021-11-13 18:18:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:09,357 INFO L470 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2021-11-13 18:18:09,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 18:18:09,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2021-11-13 18:18:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:18:09,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:09,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:09,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:18:09,366 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:09,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1209172164, now seen corresponding path program 1 times [2021-11-13 18:18:09,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:09,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589331343] [2021-11-13 18:18:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:09,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:09,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:09,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589331343] [2021-11-13 18:18:09,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589331343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:09,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:09,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:18:09,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497267560] [2021-11-13 18:18:09,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:09,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:18:09,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:09,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:18:09,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:18:09,654 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 18:18:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:16,904 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2021-11-13 18:18:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:18:16,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2021-11-13 18:18:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:16,958 INFO L225 Difference]: With dead ends: 10870 [2021-11-13 18:18:16,958 INFO L226 Difference]: Without dead ends: 7413 [2021-11-13 18:18:16,965 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 18:18:16,967 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 2579 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5862.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.99ms SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7001.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:16,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2579 Valid, 1003 Invalid, 4951 Unknown, 0 Unchecked, 32.99ms Time], IncrementalHoareTripleChecker [834 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 7001.70ms Time] [2021-11-13 18:18:16,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2021-11-13 18:18:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2021-11-13 18:18:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 0 states have call successors, (0), 0 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 18:18:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2021-11-13 18:18:17,187 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 144 [2021-11-13 18:18:17,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:17,190 INFO L470 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2021-11-13 18:18:17,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 18:18:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2021-11-13 18:18:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-13 18:18:17,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:17,196 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, 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] [2021-11-13 18:18:17,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:18:17,198 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash -56416910, now seen corresponding path program 1 times [2021-11-13 18:18:17,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:17,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968784299] [2021-11-13 18:18:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:17,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 18:18:17,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:17,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968784299] [2021-11-13 18:18:17,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968784299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:17,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:17,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:18:17,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050403789] [2021-11-13 18:18:17,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:17,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:18:17,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:18:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:18:17,452 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:18:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:21,994 INFO L93 Difference]: Finished difference Result 20357 states and 26252 transitions. [2021-11-13 18:18:21,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:18:21,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 225 [2021-11-13 18:18:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:22,083 INFO L225 Difference]: With dead ends: 20357 [2021-11-13 18:18:22,083 INFO L226 Difference]: Without dead ends: 13734 [2021-11-13 18:18:22,096 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 18:18:22,097 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 889 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3628.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.61ms SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4355.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:22,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 980 Invalid, 3323 Unknown, 0 Unchecked, 17.61ms Time], IncrementalHoareTripleChecker [747 Valid, 2576 Invalid, 0 Unknown, 0 Unchecked, 4355.86ms Time] [2021-11-13 18:18:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13734 states. [2021-11-13 18:18:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13734 to 12937. [2021-11-13 18:18:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 0 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 18:18:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2021-11-13 18:18:22,635 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 225 [2021-11-13 18:18:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:22,637 INFO L470 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2021-11-13 18:18:22,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:18:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2021-11-13 18:18:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-13 18:18:22,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:22,645 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:18:22,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:18:22,645 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1823781410, now seen corresponding path program 1 times [2021-11-13 18:18:22,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:22,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709499432] [2021-11-13 18:18:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:22,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:22,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:22,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709499432] [2021-11-13 18:18:22,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709499432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:22,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:22,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:18:22,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694466623] [2021-11-13 18:18:22,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:22,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:18:22,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:18:22,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:18:22,839 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 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 18:18:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:27,100 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2021-11-13 18:18:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:18:27,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 257 [2021-11-13 18:18:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:27,151 INFO L225 Difference]: With dead ends: 31392 [2021-11-13 18:18:27,151 INFO L226 Difference]: Without dead ends: 19244 [2021-11-13 18:18:27,169 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 18:18:27,171 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 858 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3365.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.71ms SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4060.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:27,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 16.71ms Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 4060.78ms Time] [2021-11-13 18:18:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2021-11-13 18:18:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 18447. [2021-11-13 18:18:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18447 states, 18446 states have (on average 1.2024287108316165) internal successors, (22180), 18446 states have internal predecessors, (22180), 0 states have call successors, (0), 0 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 18:18:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18447 states to 18447 states and 22180 transitions. [2021-11-13 18:18:27,547 INFO L78 Accepts]: Start accepts. Automaton has 18447 states and 22180 transitions. Word has length 257 [2021-11-13 18:18:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:27,549 INFO L470 AbstractCegarLoop]: Abstraction has 18447 states and 22180 transitions. [2021-11-13 18:18:27,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 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 18:18:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 18447 states and 22180 transitions. [2021-11-13 18:18:27,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-13 18:18:27,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:27,570 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:27,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:18:27,571 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:27,572 INFO L85 PathProgramCache]: Analyzing trace with hash 988861624, now seen corresponding path program 1 times [2021-11-13 18:18:27,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:27,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154940857] [2021-11-13 18:18:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:27,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-13 18:18:27,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:27,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154940857] [2021-11-13 18:18:27,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154940857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:27,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:27,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:18:27,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291674817] [2021-11-13 18:18:27,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:27,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:18:27,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:27,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:18:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:18:27,823 INFO L87 Difference]: Start difference. First operand 18447 states and 22180 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 18:18:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:32,048 INFO L93 Difference]: Finished difference Result 42412 states and 52037 transitions. [2021-11-13 18:18:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:18:32,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 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 346 [2021-11-13 18:18:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:32,107 INFO L225 Difference]: With dead ends: 42412 [2021-11-13 18:18:32,107 INFO L226 Difference]: Without dead ends: 24754 [2021-11-13 18:18:32,126 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 18:18:32,127 INFO L933 BasicCegarLoop]: 1796 mSDtfsCounter, 812 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3328.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.99ms SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4017.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:32,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 1947 Invalid, 3265 Unknown, 0 Unchecked, 13.99ms Time], IncrementalHoareTripleChecker [723 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 4017.79ms Time] [2021-11-13 18:18:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24754 states. [2021-11-13 18:18:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24754 to 23962. [2021-11-13 18:18:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23962 states, 23961 states have (on average 1.1787070656483452) internal successors, (28243), 23961 states have internal predecessors, (28243), 0 states have call successors, (0), 0 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 18:18:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23962 states to 23962 states and 28243 transitions. [2021-11-13 18:18:32,511 INFO L78 Accepts]: Start accepts. Automaton has 23962 states and 28243 transitions. Word has length 346 [2021-11-13 18:18:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:32,512 INFO L470 AbstractCegarLoop]: Abstraction has 23962 states and 28243 transitions. [2021-11-13 18:18:32,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 18:18:32,512 INFO L276 IsEmpty]: Start isEmpty. Operand 23962 states and 28243 transitions. [2021-11-13 18:18:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-13 18:18:32,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:32,524 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:32,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:18:32,525 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash 522484062, now seen corresponding path program 1 times [2021-11-13 18:18:32,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:32,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220161234] [2021-11-13 18:18:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:32,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 18:18:32,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:32,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220161234] [2021-11-13 18:18:32,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220161234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:32,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:32,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:18:32,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274470617] [2021-11-13 18:18:32,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:32,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:18:32,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:18:32,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:18:32,720 INFO L87 Difference]: Start difference. First operand 23962 states and 28243 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 18:18:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:41,371 INFO L93 Difference]: Finished difference Result 89062 states and 105283 transitions. [2021-11-13 18:18:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:18:41,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 355 [2021-11-13 18:18:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:41,544 INFO L225 Difference]: With dead ends: 89062 [2021-11-13 18:18:41,545 INFO L226 Difference]: Without dead ends: 65889 [2021-11-13 18:18:41,587 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 18:18:41,591 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 1732 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6611 mSolverCounterSat, 1142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6873.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 7753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.69ms SdHoareTripleChecker+Time, 1142 IncrementalHoareTripleChecker+Valid, 6611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8225.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:41,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1732 Valid, 678 Invalid, 7753 Unknown, 0 Unchecked, 27.69ms Time], IncrementalHoareTripleChecker [1142 Valid, 6611 Invalid, 0 Unknown, 0 Unchecked, 8225.37ms Time] [2021-11-13 18:18:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65889 states. [2021-11-13 18:18:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65889 to 64189. [2021-11-13 18:18:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64189 states, 64188 states have (on average 1.1559325730666168) internal successors, (74197), 64188 states have internal predecessors, (74197), 0 states have call successors, (0), 0 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 18:18:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64189 states to 64189 states and 74197 transitions. [2021-11-13 18:18:42,975 INFO L78 Accepts]: Start accepts. Automaton has 64189 states and 74197 transitions. Word has length 355 [2021-11-13 18:18:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:42,976 INFO L470 AbstractCegarLoop]: Abstraction has 64189 states and 74197 transitions. [2021-11-13 18:18:42,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 18:18:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 64189 states and 74197 transitions. [2021-11-13 18:18:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-13 18:18:42,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:42,992 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, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 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 18:18:42,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:18:42,993 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1586030933, now seen corresponding path program 1 times [2021-11-13 18:18:42,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:42,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207569200] [2021-11-13 18:18:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:42,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 280 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-13 18:18:43,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:43,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207569200] [2021-11-13 18:18:43,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207569200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:43,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:43,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:18:43,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911294294] [2021-11-13 18:18:43,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:43,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:18:43,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:43,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:18:43,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:18:43,496 INFO L87 Difference]: Start difference. First operand 64189 states and 74197 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 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 18:18:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:48,561 INFO L93 Difference]: Finished difference Result 140992 states and 162393 transitions. [2021-11-13 18:18:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:18:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 355 [2021-11-13 18:18:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:48,683 INFO L225 Difference]: With dead ends: 140992 [2021-11-13 18:18:48,684 INFO L226 Difference]: Without dead ends: 77592 [2021-11-13 18:18:48,736 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 18:18:48,748 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 730 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3689.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.43ms SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4414.67ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:48,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1199 Invalid, 2885 Unknown, 0 Unchecked, 14.43ms Time], IncrementalHoareTripleChecker [180 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 4414.67ms Time] [2021-11-13 18:18:48,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77592 states. [2021-11-13 18:18:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77592 to 76794. [2021-11-13 18:18:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76794 states, 76793 states have (on average 1.1395830349120362) internal successors, (87512), 76793 states have internal predecessors, (87512), 0 states have call successors, (0), 0 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 18:18:50,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76794 states to 76794 states and 87512 transitions. [2021-11-13 18:18:50,595 INFO L78 Accepts]: Start accepts. Automaton has 76794 states and 87512 transitions. Word has length 355 [2021-11-13 18:18:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:50,596 INFO L470 AbstractCegarLoop]: Abstraction has 76794 states and 87512 transitions. [2021-11-13 18:18:50,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 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 18:18:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 76794 states and 87512 transitions. [2021-11-13 18:18:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-11-13 18:18:50,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:50,629 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, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:50,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:18:50,630 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1356205505, now seen corresponding path program 1 times [2021-11-13 18:18:50,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:50,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591454299] [2021-11-13 18:18:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:50,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 280 proven. 113 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 18:18:51,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:51,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591454299] [2021-11-13 18:18:51,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591454299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:18:51,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114383681] [2021-11-13 18:18:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:51,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:18:51,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:18:51,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:18:51,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:18:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:51,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:18:51,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:18:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 280 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 18:18:52,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:18:52,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114383681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:52,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:18:52,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-13 18:18:52,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272758678] [2021-11-13 18:18:52,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:52,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:18:52,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:52,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:18:52,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:18:52,715 INFO L87 Difference]: Start difference. First operand 76794 states and 87512 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 18:18:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:56,868 INFO L93 Difference]: Finished difference Result 152797 states and 174229 transitions. [2021-11-13 18:18:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:18:56,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 384 [2021-11-13 18:18:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:56,986 INFO L225 Difference]: With dead ends: 152797 [2021-11-13 18:18:56,986 INFO L226 Difference]: Without dead ends: 76792 [2021-11-13 18:18:57,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:18:57,029 INFO L933 BasicCegarLoop]: 1362 mSDtfsCounter, 1122 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3047.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.33ms SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3667.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:57,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 1443 Invalid, 2916 Unknown, 0 Unchecked, 14.33ms Time], IncrementalHoareTripleChecker [450 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 3667.55ms Time] [2021-11-13 18:18:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76792 states. [2021-11-13 18:18:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76792 to 76004. [2021-11-13 18:18:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76004 states, 76003 states have (on average 1.1082325697669828) internal successors, (84229), 76003 states have internal predecessors, (84229), 0 states have call successors, (0), 0 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 18:18:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76004 states to 76004 states and 84229 transitions. [2021-11-13 18:18:58,503 INFO L78 Accepts]: Start accepts. Automaton has 76004 states and 84229 transitions. Word has length 384 [2021-11-13 18:18:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:58,504 INFO L470 AbstractCegarLoop]: Abstraction has 76004 states and 84229 transitions. [2021-11-13 18:18:58,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 18:18:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 76004 states and 84229 transitions. [2021-11-13 18:18:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-11-13 18:18:58,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:58,517 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:58,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:18:58,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 18:18:58,734 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:58,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash 166243839, now seen corresponding path program 1 times [2021-11-13 18:18:58,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:58,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077928518] [2021-11-13 18:18:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:58,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-13 18:18:58,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:58,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077928518] [2021-11-13 18:18:58,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077928518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:58,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:58,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:18:58,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713270144] [2021-11-13 18:18:58,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:58,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:18:58,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:58,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:18:58,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:18:58,953 INFO L87 Difference]: Start difference. First operand 76004 states and 84229 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:19:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:04,306 INFO L93 Difference]: Finished difference Result 170117 states and 190568 transitions. [2021-11-13 18:19:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:19:04,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 414 [2021-11-13 18:19:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:04,432 INFO L225 Difference]: With dead ends: 170117 [2021-11-13 18:19:04,432 INFO L226 Difference]: Without dead ends: 94902 [2021-11-13 18:19:04,494 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 18:19:04,497 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 905 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3896.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.91ms SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4635.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:04,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 907 Invalid, 3359 Unknown, 0 Unchecked, 13.91ms Time], IncrementalHoareTripleChecker [944 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 4635.44ms Time] [2021-11-13 18:19:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94902 states. [2021-11-13 18:19:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94902 to 94884. [2021-11-13 18:19:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94884 states, 94883 states have (on average 1.114235426788782) internal successors, (105722), 94883 states have internal predecessors, (105722), 0 states have call successors, (0), 0 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 18:19:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94884 states to 94884 states and 105722 transitions. [2021-11-13 18:19:06,097 INFO L78 Accepts]: Start accepts. Automaton has 94884 states and 105722 transitions. Word has length 414 [2021-11-13 18:19:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:06,100 INFO L470 AbstractCegarLoop]: Abstraction has 94884 states and 105722 transitions. [2021-11-13 18:19:06,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:19:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 94884 states and 105722 transitions. [2021-11-13 18:19:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-11-13 18:19:06,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:06,122 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:06,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:19:06,122 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:06,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:06,123 INFO L85 PathProgramCache]: Analyzing trace with hash 296355202, now seen corresponding path program 1 times [2021-11-13 18:19:06,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:06,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097104038] [2021-11-13 18:19:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:06,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-13 18:19:06,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:06,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097104038] [2021-11-13 18:19:06,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097104038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:06,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:06,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:19:06,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946454889] [2021-11-13 18:19:06,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:06,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:19:06,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:06,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:19:06,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:19:06,447 INFO L87 Difference]: Start difference. First operand 94884 states and 105722 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 18:19:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:11,588 INFO L93 Difference]: Finished difference Result 208751 states and 232952 transitions. [2021-11-13 18:19:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:19:11,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 447 [2021-11-13 18:19:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:11,773 INFO L225 Difference]: With dead ends: 208751 [2021-11-13 18:19:11,773 INFO L226 Difference]: Without dead ends: 128831 [2021-11-13 18:19:12,073 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 18:19:12,090 INFO L933 BasicCegarLoop]: 1922 mSDtfsCounter, 910 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2703 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3768.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.43ms SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 2703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4457.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:12,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 2102 Invalid, 2936 Unknown, 0 Unchecked, 15.43ms Time], IncrementalHoareTripleChecker [233 Valid, 2703 Invalid, 0 Unknown, 0 Unchecked, 4457.99ms Time] [2021-11-13 18:19:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128831 states. [2021-11-13 18:19:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128831 to 117800. [2021-11-13 18:19:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117800 states, 117799 states have (on average 1.1065968301938047) internal successors, (130356), 117799 states have internal predecessors, (130356), 0 states have call successors, (0), 0 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 18:19:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117800 states to 117800 states and 130356 transitions. [2021-11-13 18:19:13,600 INFO L78 Accepts]: Start accepts. Automaton has 117800 states and 130356 transitions. Word has length 447 [2021-11-13 18:19:13,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:13,600 INFO L470 AbstractCegarLoop]: Abstraction has 117800 states and 130356 transitions. [2021-11-13 18:19:13,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 18:19:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 117800 states and 130356 transitions. [2021-11-13 18:19:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2021-11-13 18:19:13,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:13,611 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, 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, 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] [2021-11-13 18:19:13,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:19:13,612 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1736972796, now seen corresponding path program 1 times [2021-11-13 18:19:13,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:13,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476080353] [2021-11-13 18:19:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:13,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 450 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-13 18:19:14,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:14,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476080353] [2021-11-13 18:19:14,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476080353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:14,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:14,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:19:14,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918854002] [2021-11-13 18:19:14,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:14,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:19:14,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:14,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:19:14,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:19:14,186 INFO L87 Difference]: Start difference. First operand 117800 states and 130356 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 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 18:19:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:19,249 INFO L93 Difference]: Finished difference Result 236399 states and 261532 transitions. [2021-11-13 18:19:19,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:19:19,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 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 452 [2021-11-13 18:19:19,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:19,399 INFO L225 Difference]: With dead ends: 236399 [2021-11-13 18:19:19,399 INFO L226 Difference]: Without dead ends: 117814 [2021-11-13 18:19:19,439 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 18:19:19,440 INFO L933 BasicCegarLoop]: 1718 mSDtfsCounter, 793 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3626.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.39ms SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4335.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:19,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 1869 Invalid, 3187 Unknown, 0 Unchecked, 13.39ms Time], IncrementalHoareTripleChecker [681 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 4335.31ms Time] [2021-11-13 18:19:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117814 states. [2021-11-13 18:19:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117814 to 116215. [2021-11-13 18:19:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116215 states, 116214 states have (on average 1.0753093431084035) internal successors, (124966), 116214 states have internal predecessors, (124966), 0 states have call successors, (0), 0 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 18:19:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116215 states to 116215 states and 124966 transitions. [2021-11-13 18:19:21,877 INFO L78 Accepts]: Start accepts. Automaton has 116215 states and 124966 transitions. Word has length 452 [2021-11-13 18:19:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:21,879 INFO L470 AbstractCegarLoop]: Abstraction has 116215 states and 124966 transitions. [2021-11-13 18:19:21,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 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 18:19:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 116215 states and 124966 transitions. [2021-11-13 18:19:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-11-13 18:19:21,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:21,899 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:19:21,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:19:21,899 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 778419174, now seen corresponding path program 1 times [2021-11-13 18:19:21,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:21,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659460675] [2021-11-13 18:19:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:21,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 18:19:22,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:22,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659460675] [2021-11-13 18:19:22,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659460675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:22,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:22,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:19:22,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581940362] [2021-11-13 18:19:22,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:22,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:19:22,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:22,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:19:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:19:22,189 INFO L87 Difference]: Start difference. First operand 116215 states and 124966 transitions. Second operand has 4 states, 4 states have (on average 92.0) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 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 18:19:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:30,660 INFO L93 Difference]: Finished difference Result 281271 states and 306273 transitions. [2021-11-13 18:19:30,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:19:30,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 18:19:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:31,322 INFO L225 Difference]: With dead ends: 281271 [2021-11-13 18:19:31,322 INFO L226 Difference]: Without dead ends: 180020 [2021-11-13 18:19:31,359 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 18:19:31,360 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 1482 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 5269 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6333.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 6119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.31ms SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 5269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7483.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:31,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1482 Valid, 875 Invalid, 6119 Unknown, 0 Unchecked, 27.31ms Time], IncrementalHoareTripleChecker [850 Valid, 5269 Invalid, 0 Unknown, 0 Unchecked, 7483.76ms Time] [2021-11-13 18:19:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180020 states. [2021-11-13 18:19:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180020 to 179997. [2021-11-13 18:19:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179997 states, 179996 states have (on average 1.0784406320140447) internal successors, (194115), 179996 states have internal predecessors, (194115), 0 states have call successors, (0), 0 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 18:19:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179997 states to 179997 states and 194115 transitions. [2021-11-13 18:19:34,767 INFO L78 Accepts]: Start accepts. Automaton has 179997 states and 194115 transitions. Word has length 462 [2021-11-13 18:19:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:34,768 INFO L470 AbstractCegarLoop]: Abstraction has 179997 states and 194115 transitions. [2021-11-13 18:19:34,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 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 18:19:34,769 INFO L276 IsEmpty]: Start isEmpty. Operand 179997 states and 194115 transitions. [2021-11-13 18:19:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-13 18:19:34,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:34,785 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:34,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:19:34,786 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:34,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1386691199, now seen corresponding path program 1 times [2021-11-13 18:19:34,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:34,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491789328] [2021-11-13 18:19:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:34,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 352 proven. 110 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 18:19:35,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:35,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491789328] [2021-11-13 18:19:35,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491789328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:19:35,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440560732] [2021-11-13 18:19:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:35,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:19:35,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:19:35,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:19:35,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:19:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:35,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:19:35,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:19:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 349 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 18:19:36,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:19:36,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440560732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:36,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:19:36,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-13 18:19:36,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907580539] [2021-11-13 18:19:36,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:36,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:19:36,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:19:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:19:36,321 INFO L87 Difference]: Start difference. First operand 179997 states and 194115 transitions. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 18:19:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:43,659 INFO L93 Difference]: Finished difference Result 378862 states and 409096 transitions. [2021-11-13 18:19:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:19:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 474 [2021-11-13 18:19:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:43,982 INFO L225 Difference]: With dead ends: 378862 [2021-11-13 18:19:43,982 INFO L226 Difference]: Without dead ends: 211465 [2021-11-13 18:19:44,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:19:44,064 INFO L933 BasicCegarLoop]: 1638 mSDtfsCounter, 939 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2659 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4796.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 3414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.42ms SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 2659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5627.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:44,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 1753 Invalid, 3414 Unknown, 0 Unchecked, 20.42ms Time], IncrementalHoareTripleChecker [755 Valid, 2659 Invalid, 0 Unknown, 0 Unchecked, 5627.53ms Time] [2021-11-13 18:19:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211465 states. [2021-11-13 18:19:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211465 to 200403. [2021-11-13 18:19:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200403 states, 200402 states have (on average 1.0733575513218432) internal successors, (215103), 200402 states have internal predecessors, (215103), 0 states have call successors, (0), 0 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 18:19:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200403 states to 200403 states and 215103 transitions. [2021-11-13 18:19:47,441 INFO L78 Accepts]: Start accepts. Automaton has 200403 states and 215103 transitions. Word has length 474 [2021-11-13 18:19:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:47,442 INFO L470 AbstractCegarLoop]: Abstraction has 200403 states and 215103 transitions. [2021-11-13 18:19:47,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 18:19:47,442 INFO L276 IsEmpty]: Start isEmpty. Operand 200403 states and 215103 transitions. [2021-11-13 18:19:47,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-13 18:19:47,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:47,459 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:47,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:19:47,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f9b6d-cfa6-4211-98f8-177310d45901/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:19:47,670 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:47,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1514961737, now seen corresponding path program 1 times [2021-11-13 18:19:47,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:47,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267805107] [2021-11-13 18:19:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:47,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 18:19:47,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:47,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267805107] [2021-11-13 18:19:47,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267805107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:47,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:47,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:19:47,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68196647] [2021-11-13 18:19:47,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:47,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:19:47,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:19:48,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:19:48,000 INFO L87 Difference]: Start difference. First operand 200403 states and 215103 transitions. Second operand has 4 states, 4 states have (on average 103.0) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 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 18:19:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:57,476 INFO L93 Difference]: Finished difference Result 459903 states and 496229 transitions. [2021-11-13 18:19:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:19:57,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.0) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 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 506 [2021-11-13 18:19:57,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:57,848 INFO L225 Difference]: With dead ends: 459903 [2021-11-13 18:19:57,848 INFO L226 Difference]: Without dead ends: 274463 [2021-11-13 18:19:57,935 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 18:19:57,935 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 1461 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 4886 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6286.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 5737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.82ms SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 4886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7411.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:57,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1461 Valid, 900 Invalid, 5737 Unknown, 0 Unchecked, 24.82ms Time], IncrementalHoareTripleChecker [851 Valid, 4886 Invalid, 0 Unknown, 0 Unchecked, 7411.18ms Time] [2021-11-13 18:19:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274463 states.