./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX --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 4d9630e6a4c9245b15f4f309d83464d257ca20ee86c7917689a5d5471eca79bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:57:58,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:57:58,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:57:58,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:57:58,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:57:58,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:57:58,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:57:58,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:57:58,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:57:58,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:57:58,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:57:58,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:57:58,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:57:58,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:57:58,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:57:58,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:57:58,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:57:58,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:57:58,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:57:58,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:57:58,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:57:58,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:57:58,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:57:58,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:57:58,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:57:58,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:57:58,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:57:58,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:57:58,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:57:58,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:57:58,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:57:58,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:57:58,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:57:58,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:57:58,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:57:58,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:57:58,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:57:58,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:57:58,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:57:58,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:57:58,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:57:58,922 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:57:58,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:57:58,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:57:58,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:57:58,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:57:58,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:57:58,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:57:58,947 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:57:58,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:57:58,948 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:57:58,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:57:58,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:57:58,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:57:58,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:57:58,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:57:58,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:57:58,950 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:57:58,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:57:58,950 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:57:58,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:57:58,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:57:58,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:57:58,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:57:58,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:57:58,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:57:58,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:57:58,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:57:58,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:57:58,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:57:58,953 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:57:58,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:57:58,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:57:58,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:57:58,954 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_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d9630e6a4c9245b15f4f309d83464d257ca20ee86c7917689a5d5471eca79bd [2021-11-09 08:57:59,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:57:59,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:57:59,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:57:59,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:57:59,223 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:57:59,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem17_label07.c [2021-11-09 08:57:59,306 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/data/005a4e6ab/187f7f19f3df4b23a90a23cabb73f700/FLAG50e3e3372 [2021-11-09 08:58:00,112 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:58:00,113 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/sv-benchmarks/c/eca-rers2012/Problem17_label07.c [2021-11-09 08:58:00,142 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/data/005a4e6ab/187f7f19f3df4b23a90a23cabb73f700/FLAG50e3e3372 [2021-11-09 08:58:00,661 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/data/005a4e6ab/187f7f19f3df4b23a90a23cabb73f700 [2021-11-09 08:58:00,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:58:00,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:58:00,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:58:00,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:58:00,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:58:00,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:58:00" (1/1) ... [2021-11-09 08:58:00,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123ef303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:00, skipping insertion in model container [2021-11-09 08:58:00,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:58:00" (1/1) ... [2021-11-09 08:58:00,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:58:00,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:58:01,055 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_5c7e1894-dd26-496c-a4c0-dc3383c56451/sv-benchmarks/c/eca-rers2012/Problem17_label07.c[4239,4252] [2021-11-09 08:58:01,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:58:01,787 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:58:01,807 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_5c7e1894-dd26-496c-a4c0-dc3383c56451/sv-benchmarks/c/eca-rers2012/Problem17_label07.c[4239,4252] [2021-11-09 08:58:02,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:58:02,224 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:58:02,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02 WrapperNode [2021-11-09 08:58:02,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:58:02,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:58:02,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:58:02,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:58:02,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (1/1) ... [2021-11-09 08:58:02,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (1/1) ... [2021-11-09 08:58:02,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:58:02,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:58:02,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:58:02,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:58:02,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (1/1) ... [2021-11-09 08:58:02,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (1/1) ... [2021-11-09 08:58:02,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (1/1) ... [2021-11-09 08:58:02,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (1/1) ... [2021-11-09 08:58:03,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (1/1) ... [2021-11-09 08:58:03,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (1/1) ... [2021-11-09 08:58:03,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (1/1) ... [2021-11-09 08:58:03,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:58:03,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:58:03,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:58:03,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:58:03,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (1/1) ... [2021-11-09 08:58:03,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:58:03,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:03,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:58:03,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:58:03,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:58:03,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:58:03,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:58:03,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:58:07,646 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:58:07,647 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-09 08:58:07,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:58:07 BoogieIcfgContainer [2021-11-09 08:58:07,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:58:07,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:58:07,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:58:07,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:58:07,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:58:00" (1/3) ... [2021-11-09 08:58:07,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b3bf5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:58:07, skipping insertion in model container [2021-11-09 08:58:07,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:02" (2/3) ... [2021-11-09 08:58:07,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b3bf5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:58:07, skipping insertion in model container [2021-11-09 08:58:07,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:58:07" (3/3) ... [2021-11-09 08:58:07,664 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label07.c [2021-11-09 08:58:07,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:58:07,674 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:58:07,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:58:07,761 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 [2021-11-09 08:58:07,761 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:58:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:07,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:58:07,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:07,806 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:07,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash -438767135, now seen corresponding path program 1 times [2021-11-09 08:58:07,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:07,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486194873] [2021-11-09 08:58:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:07,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:08,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:08,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486194873] [2021-11-09 08:58:08,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486194873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:08,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:08,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:58:08,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831514678] [2021-11-09 08:58:08,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:08,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:08,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:08,098 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:11,714 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-11-09 08:58:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:11,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 08:58:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:11,752 INFO L225 Difference]: With dead ends: 1642 [2021-11-09 08:58:11,752 INFO L226 Difference]: Without dead ends: 975 [2021-11-09 08:58:11,757 INFO L786 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 [2021-11-09 08:58:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-09 08:58:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-11-09 08:58:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-11-09 08:58:11,870 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 27 [2021-11-09 08:58:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:11,871 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-11-09 08:58:11,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-11-09 08:58:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 08:58:11,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:11,876 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:11,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:58:11,877 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:11,878 INFO L85 PathProgramCache]: Analyzing trace with hash -302238124, now seen corresponding path program 1 times [2021-11-09 08:58:11,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:11,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481142883] [2021-11-09 08:58:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:11,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:12,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:12,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481142883] [2021-11-09 08:58:12,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481142883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:12,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:12,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:12,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873553734] [2021-11-09 08:58:12,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:12,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:12,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:12,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:12,130 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:15,440 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-11-09 08:58:15,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:15,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-09 08:58:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:15,453 INFO L225 Difference]: With dead ends: 2814 [2021-11-09 08:58:15,454 INFO L226 Difference]: Without dead ends: 1844 [2021-11-09 08:58:15,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-09 08:58:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-11-09 08:58:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-11-09 08:58:15,514 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 97 [2021-11-09 08:58:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:15,515 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-11-09 08:58:15,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-11-09 08:58:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-09 08:58:15,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:15,521 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:15,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:58:15,521 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:15,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash 810430801, now seen corresponding path program 1 times [2021-11-09 08:58:15,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:15,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373905271] [2021-11-09 08:58:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:15,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:15,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:15,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373905271] [2021-11-09 08:58:15,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373905271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:15,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:15,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:58:15,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972773422] [2021-11-09 08:58:15,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:15,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:15,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:15,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:15,704 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:18,698 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2021-11-09 08:58:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:18,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-09 08:58:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:18,714 INFO L225 Difference]: With dead ends: 5395 [2021-11-09 08:58:18,714 INFO L226 Difference]: Without dead ends: 2701 [2021-11-09 08:58:18,718 INFO L786 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 [2021-11-09 08:58:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-11-09 08:58:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2021-11-09 08:58:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2021-11-09 08:58:18,800 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 119 [2021-11-09 08:58:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:18,801 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2021-11-09 08:58:18,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2021-11-09 08:58:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-09 08:58:18,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:18,818 INFO L513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 08:58:18,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:58:18,818 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash -327978434, now seen corresponding path program 1 times [2021-11-09 08:58:18,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:18,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431690999] [2021-11-09 08:58:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:18,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:19,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:19,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431690999] [2021-11-09 08:58:19,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431690999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:19,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:19,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:19,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670826597] [2021-11-09 08:58:19,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:19,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:19,026 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:21,173 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2021-11-09 08:58:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 179 [2021-11-09 08:58:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:21,208 INFO L225 Difference]: With dead ends: 7108 [2021-11-09 08:58:21,209 INFO L226 Difference]: Without dead ends: 4409 [2021-11-09 08:58:21,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-11-09 08:58:21,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2021-11-09 08:58:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2021-11-09 08:58:21,319 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 179 [2021-11-09 08:58:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:21,320 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2021-11-09 08:58:21,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2021-11-09 08:58:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-09 08:58:21,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:21,323 INFO L513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 08:58:21,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:58:21,324 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 459537123, now seen corresponding path program 1 times [2021-11-09 08:58:21,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:21,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527267546] [2021-11-09 08:58:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:21,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 08:58:21,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:21,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527267546] [2021-11-09 08:58:21,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527267546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:21,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:21,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:21,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236695130] [2021-11-09 08:58:21,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:21,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:21,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:21,478 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:23,788 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2021-11-09 08:58:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:23,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 181 [2021-11-09 08:58:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:23,824 INFO L225 Difference]: With dead ends: 10936 [2021-11-09 08:58:23,824 INFO L226 Difference]: Without dead ends: 6528 [2021-11-09 08:58:23,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-11-09 08:58:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2021-11-09 08:58:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2021-11-09 08:58:24,034 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 181 [2021-11-09 08:58:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:24,035 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2021-11-09 08:58:24,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2021-11-09 08:58:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-09 08:58:24,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:24,042 INFO L513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 08:58:24,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:58:24,043 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2033064541, now seen corresponding path program 1 times [2021-11-09 08:58:24,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:24,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418719506] [2021-11-09 08:58:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:24,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 08:58:24,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:24,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418719506] [2021-11-09 08:58:24,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418719506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:24,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:24,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:24,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202101298] [2021-11-09 08:58:24,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:24,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:24,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:24,274 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:26,854 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2021-11-09 08:58:26,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:26,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 247 [2021-11-09 08:58:26,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:26,893 INFO L225 Difference]: With dead ends: 10045 [2021-11-09 08:58:26,893 INFO L226 Difference]: Without dead ends: 5665 [2021-11-09 08:58:26,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2021-11-09 08:58:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2021-11-09 08:58:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2021-11-09 08:58:27,009 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 247 [2021-11-09 08:58:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:27,009 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2021-11-09 08:58:27,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2021-11-09 08:58:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-09 08:58:27,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:27,015 INFO L513 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:27,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:58:27,015 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash 670756641, now seen corresponding path program 1 times [2021-11-09 08:58:27,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:27,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402604964] [2021-11-09 08:58:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:27,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-09 08:58:27,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:27,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402604964] [2021-11-09 08:58:27,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402604964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:27,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:27,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:27,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127830111] [2021-11-09 08:58:27,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:27,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:27,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:27,200 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:29,776 INFO L93 Difference]: Finished difference Result 13051 states and 15223 transitions. [2021-11-09 08:58:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:29,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 259 [2021-11-09 08:58:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:29,810 INFO L225 Difference]: With dead ends: 13051 [2021-11-09 08:58:29,810 INFO L226 Difference]: Without dead ends: 7391 [2021-11-09 08:58:29,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:29,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-11-09 08:58:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 6959. [2021-11-09 08:58:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6959 states, 6958 states have (on average 1.1636964645012935) internal successors, (8097), 6958 states have internal predecessors, (8097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6959 states to 6959 states and 8097 transitions. [2021-11-09 08:58:29,960 INFO L78 Accepts]: Start accepts. Automaton has 6959 states and 8097 transitions. Word has length 259 [2021-11-09 08:58:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:29,961 INFO L470 AbstractCegarLoop]: Abstraction has 6959 states and 8097 transitions. [2021-11-09 08:58:29,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 6959 states and 8097 transitions. [2021-11-09 08:58:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-09 08:58:29,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:29,967 INFO L513 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:29,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:58:29,967 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:29,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:29,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1874496226, now seen corresponding path program 1 times [2021-11-09 08:58:29,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:29,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317746134] [2021-11-09 08:58:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:29,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-09 08:58:30,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:30,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317746134] [2021-11-09 08:58:30,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317746134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:30,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:30,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:30,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168526628] [2021-11-09 08:58:30,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:30,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:30,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:30,087 INFO L87 Difference]: Start difference. First operand 6959 states and 8097 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:32,066 INFO L93 Difference]: Finished difference Result 17316 states and 20393 transitions. [2021-11-09 08:58:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:32,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 264 [2021-11-09 08:58:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:32,155 INFO L225 Difference]: With dead ends: 17316 [2021-11-09 08:58:32,155 INFO L226 Difference]: Without dead ends: 10359 [2021-11-09 08:58:32,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:32,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2021-11-09 08:58:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 9509. [2021-11-09 08:58:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9509 states, 9508 states have (on average 1.141459823306689) internal successors, (10853), 9508 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9509 states to 9509 states and 10853 transitions. [2021-11-09 08:58:32,324 INFO L78 Accepts]: Start accepts. Automaton has 9509 states and 10853 transitions. Word has length 264 [2021-11-09 08:58:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:32,325 INFO L470 AbstractCegarLoop]: Abstraction has 9509 states and 10853 transitions. [2021-11-09 08:58:32,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 9509 states and 10853 transitions. [2021-11-09 08:58:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-09 08:58:32,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:32,332 INFO L513 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:58:32,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:58:32,332 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:32,333 INFO L85 PathProgramCache]: Analyzing trace with hash -168042548, now seen corresponding path program 1 times [2021-11-09 08:58:32,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:32,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772286241] [2021-11-09 08:58:32,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:32,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 08:58:32,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:32,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772286241] [2021-11-09 08:58:32,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772286241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:32,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:32,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:32,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408260004] [2021-11-09 08:58:32,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:32,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:32,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:32,516 INFO L87 Difference]: Start difference. First operand 9509 states and 10853 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:34,680 INFO L93 Difference]: Finished difference Result 22432 states and 25678 transitions. [2021-11-09 08:58:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 282 [2021-11-09 08:58:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:34,709 INFO L225 Difference]: With dead ends: 22432 [2021-11-09 08:58:34,710 INFO L226 Difference]: Without dead ends: 12493 [2021-11-09 08:58:34,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12493 states. [2021-11-09 08:58:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12493 to 11637. [2021-11-09 08:58:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11637 states, 11636 states have (on average 1.1473014781711928) internal successors, (13350), 11636 states have internal predecessors, (13350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11637 states to 11637 states and 13350 transitions. [2021-11-09 08:58:35,002 INFO L78 Accepts]: Start accepts. Automaton has 11637 states and 13350 transitions. Word has length 282 [2021-11-09 08:58:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:35,003 INFO L470 AbstractCegarLoop]: Abstraction has 11637 states and 13350 transitions. [2021-11-09 08:58:35,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 11637 states and 13350 transitions. [2021-11-09 08:58:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-09 08:58:35,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:35,010 INFO L513 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:58:35,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:58:35,010 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash 278678807, now seen corresponding path program 1 times [2021-11-09 08:58:35,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:35,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363379091] [2021-11-09 08:58:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:35,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 227 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:35,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:35,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363379091] [2021-11-09 08:58:35,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363379091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:35,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706526197] [2021-11-09 08:58:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:35,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:35,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:35,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:35,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:58:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:35,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:58:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 192 proven. 82 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:58:36,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706526197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:36,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:36,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-11-09 08:58:36,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447958287] [2021-11-09 08:58:36,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:58:36,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:36,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:58:36,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:58:36,800 INFO L87 Difference]: Start difference. First operand 11637 states and 13350 transitions. Second operand has 7 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:44,078 INFO L93 Difference]: Finished difference Result 41632 states and 47059 transitions. [2021-11-09 08:58:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:58:44,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 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 287 [2021-11-09 08:58:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:44,126 INFO L225 Difference]: With dead ends: 41632 [2021-11-09 08:58:44,126 INFO L226 Difference]: Without dead ends: 27440 [2021-11-09 08:58:44,144 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:58:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27440 states. [2021-11-09 08:58:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27440 to 23586. [2021-11-09 08:58:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23586 states, 23585 states have (on average 1.1316090735637057) internal successors, (26689), 23585 states have internal predecessors, (26689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23586 states to 23586 states and 26689 transitions. [2021-11-09 08:58:44,620 INFO L78 Accepts]: Start accepts. Automaton has 23586 states and 26689 transitions. Word has length 287 [2021-11-09 08:58:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:44,621 INFO L470 AbstractCegarLoop]: Abstraction has 23586 states and 26689 transitions. [2021-11-09 08:58:44,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 23586 states and 26689 transitions. [2021-11-09 08:58:44,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-09 08:58:44,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:44,639 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-09 08:58:44,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:44,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:58:44,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1654896481, now seen corresponding path program 1 times [2021-11-09 08:58:44,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:44,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374254622] [2021-11-09 08:58:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:44,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 534 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:58:45,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:45,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374254622] [2021-11-09 08:58:45,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374254622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:45,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:45,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:58:45,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226305882] [2021-11-09 08:58:45,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:58:45,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:58:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:58:45,052 INFO L87 Difference]: Start difference. First operand 23586 states and 26689 transitions. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:48,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:48,064 INFO L93 Difference]: Finished difference Result 46320 states and 52510 transitions. [2021-11-09 08:58:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:58:48,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 369 [2021-11-09 08:58:48,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:48,090 INFO L225 Difference]: With dead ends: 46320 [2021-11-09 08:58:48,091 INFO L226 Difference]: Without dead ends: 23586 [2021-11-09 08:58:48,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:58:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23586 states. [2021-11-09 08:58:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23586 to 23586. [2021-11-09 08:58:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23586 states, 23585 states have (on average 1.1305914776340895) internal successors, (26665), 23585 states have internal predecessors, (26665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23586 states to 23586 states and 26665 transitions. [2021-11-09 08:58:48,545 INFO L78 Accepts]: Start accepts. Automaton has 23586 states and 26665 transitions. Word has length 369 [2021-11-09 08:58:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:48,546 INFO L470 AbstractCegarLoop]: Abstraction has 23586 states and 26665 transitions. [2021-11-09 08:58:48,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23586 states and 26665 transitions. [2021-11-09 08:58:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-11-09 08:58:48,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:48,558 INFO L513 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:48,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:58:48,559 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:48,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:48,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2033685675, now seen corresponding path program 1 times [2021-11-09 08:58:48,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:48,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859712928] [2021-11-09 08:58:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:48,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 205 proven. 73 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:58:48,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:48,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859712928] [2021-11-09 08:58:48,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859712928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:48,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138516240] [2021-11-09 08:58:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:48,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:48,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:48,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:48,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:58:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:49,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:58:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 205 proven. 25 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 08:58:50,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138516240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:50,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:50,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-11-09 08:58:50,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340156708] [2021-11-09 08:58:50,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:58:50,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:50,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:58:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:58:50,123 INFO L87 Difference]: Start difference. First operand 23586 states and 26665 transitions. Second operand has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:58,820 INFO L93 Difference]: Finished difference Result 76586 states and 86002 transitions. [2021-11-09 08:58:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:58:58,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 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 390 [2021-11-09 08:58:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:58,871 INFO L225 Difference]: With dead ends: 76586 [2021-11-09 08:58:58,872 INFO L226 Difference]: Without dead ends: 52142 [2021-11-09 08:58:58,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:58:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52142 states. [2021-11-09 08:58:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52142 to 48275. [2021-11-09 08:58:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48275 states, 48274 states have (on average 1.1034925632845838) internal successors, (53270), 48274 states have internal predecessors, (53270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48275 states to 48275 states and 53270 transitions. [2021-11-09 08:58:59,614 INFO L78 Accepts]: Start accepts. Automaton has 48275 states and 53270 transitions. Word has length 390 [2021-11-09 08:58:59,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:59,616 INFO L470 AbstractCegarLoop]: Abstraction has 48275 states and 53270 transitions. [2021-11-09 08:58:59,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 48275 states and 53270 transitions. [2021-11-09 08:58:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-11-09 08:58:59,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:59,623 INFO L513 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:59,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:59,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:59,852 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1907869515, now seen corresponding path program 1 times [2021-11-09 08:58:59,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:59,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424996290] [2021-11-09 08:58:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:59,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-09 08:59:00,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:00,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424996290] [2021-11-09 08:59:00,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424996290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:59:00,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:59:00,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:59:00,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123461326] [2021-11-09 08:59:00,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:59:00,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:00,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:59:00,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:59:00,029 INFO L87 Difference]: Start difference. First operand 48275 states and 53270 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:02,156 INFO L93 Difference]: Finished difference Result 95264 states and 105217 transitions. [2021-11-09 08:59:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:59:02,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 396 [2021-11-09 08:59:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:02,258 INFO L225 Difference]: With dead ends: 95264 [2021-11-09 08:59:02,259 INFO L226 Difference]: Without dead ends: 47840 [2021-11-09 08:59:02,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:59:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47840 states. [2021-11-09 08:59:02,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47840 to 45284. [2021-11-09 08:59:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45284 states, 45283 states have (on average 1.0794337830974097) internal successors, (48880), 45283 states have internal predecessors, (48880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45284 states to 45284 states and 48880 transitions. [2021-11-09 08:59:03,070 INFO L78 Accepts]: Start accepts. Automaton has 45284 states and 48880 transitions. Word has length 396 [2021-11-09 08:59:03,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:03,071 INFO L470 AbstractCegarLoop]: Abstraction has 45284 states and 48880 transitions. [2021-11-09 08:59:03,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 45284 states and 48880 transitions. [2021-11-09 08:59:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2021-11-09 08:59:03,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:03,084 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 08:59:03,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:59:03,084 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:03,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1069283924, now seen corresponding path program 1 times [2021-11-09 08:59:03,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:03,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188523474] [2021-11-09 08:59:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:03,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-11-09 08:59:03,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:03,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188523474] [2021-11-09 08:59:03,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188523474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:59:03,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:59:03,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:59:03,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483252217] [2021-11-09 08:59:03,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:59:03,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:59:03,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:59:03,304 INFO L87 Difference]: Start difference. First operand 45284 states and 48880 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:05,674 INFO L93 Difference]: Finished difference Result 98224 states and 106368 transitions. [2021-11-09 08:59:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:59:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 456 [2021-11-09 08:59:05,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:05,730 INFO L225 Difference]: With dead ends: 98224 [2021-11-09 08:59:05,731 INFO L226 Difference]: Without dead ends: 53364 [2021-11-09 08:59:05,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:59:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53364 states. [2021-11-09 08:59:06,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53364 to 51234. [2021-11-09 08:59:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51234 states, 51233 states have (on average 1.0758690687642731) internal successors, (55120), 51233 states have internal predecessors, (55120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51234 states to 51234 states and 55120 transitions. [2021-11-09 08:59:06,607 INFO L78 Accepts]: Start accepts. Automaton has 51234 states and 55120 transitions. Word has length 456 [2021-11-09 08:59:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:06,607 INFO L470 AbstractCegarLoop]: Abstraction has 51234 states and 55120 transitions. [2021-11-09 08:59:06,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 51234 states and 55120 transitions. [2021-11-09 08:59:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-11-09 08:59:06,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:06,619 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-09 08:59:06,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:59:06,619 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash -586802033, now seen corresponding path program 1 times [2021-11-09 08:59:06,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:06,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163961817] [2021-11-09 08:59:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:06,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-09 08:59:06,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:06,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163961817] [2021-11-09 08:59:06,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163961817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:59:06,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:59:06,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:59:06,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860062563] [2021-11-09 08:59:06,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:59:06,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:06,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:59:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:59:06,946 INFO L87 Difference]: Start difference. First operand 51234 states and 55120 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) [2021-11-09 08:59:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:09,399 INFO L93 Difference]: Finished difference Result 119942 states and 129526 transitions. [2021-11-09 08:59:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:59:09,400 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 469 [2021-11-09 08:59:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:09,464 INFO L225 Difference]: With dead ends: 119942 [2021-11-09 08:59:09,464 INFO L226 Difference]: Without dead ends: 69130 [2021-11-09 08:59:09,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:59:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69130 states. [2021-11-09 08:59:10,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69130 to 64838. [2021-11-09 08:59:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64838 states, 64837 states have (on average 1.0758825978993476) internal successors, (69757), 64837 states have internal predecessors, (69757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:10,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64838 states to 64838 states and 69757 transitions. [2021-11-09 08:59:10,440 INFO L78 Accepts]: Start accepts. Automaton has 64838 states and 69757 transitions. Word has length 469 [2021-11-09 08:59:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:10,441 INFO L470 AbstractCegarLoop]: Abstraction has 64838 states and 69757 transitions. [2021-11-09 08:59:10,441 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) [2021-11-09 08:59:10,441 INFO L276 IsEmpty]: Start isEmpty. Operand 64838 states and 69757 transitions. [2021-11-09 08:59:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-11-09 08:59:10,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:10,454 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 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] [2021-11-09 08:59:10,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:59:10,455 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:10,456 INFO L85 PathProgramCache]: Analyzing trace with hash 362545653, now seen corresponding path program 1 times [2021-11-09 08:59:10,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:10,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327480564] [2021-11-09 08:59:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:10,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-09 08:59:10,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:10,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327480564] [2021-11-09 08:59:10,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327480564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:59:10,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:59:10,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:59:10,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185033832] [2021-11-09 08:59:10,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:59:10,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:10,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:59:10,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:59:10,867 INFO L87 Difference]: Start difference. First operand 64838 states and 69757 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:12,232 INFO L93 Difference]: Finished difference Result 123700 states and 133124 transitions. [2021-11-09 08:59:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:59:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 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 493 [2021-11-09 08:59:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:12,453 INFO L225 Difference]: With dead ends: 123700 [2021-11-09 08:59:12,453 INFO L226 Difference]: Without dead ends: 59713 [2021-11-09 08:59:12,469 INFO L786 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 [2021-11-09 08:59:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59713 states. [2021-11-09 08:59:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59713 to 58421. [2021-11-09 08:59:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58421 states, 58420 states have (on average 1.0761896610749744) internal successors, (62871), 58420 states have internal predecessors, (62871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58421 states to 58421 states and 62871 transitions. [2021-11-09 08:59:13,207 INFO L78 Accepts]: Start accepts. Automaton has 58421 states and 62871 transitions. Word has length 493 [2021-11-09 08:59:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:13,207 INFO L470 AbstractCegarLoop]: Abstraction has 58421 states and 62871 transitions. [2021-11-09 08:59:13,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 58421 states and 62871 transitions. [2021-11-09 08:59:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-11-09 08:59:13,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:13,221 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-09 08:59:13,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 08:59:13,222 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1507987368, now seen corresponding path program 1 times [2021-11-09 08:59:13,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:13,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122080325] [2021-11-09 08:59:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:13,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 608 proven. 72 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-09 08:59:13,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:13,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122080325] [2021-11-09 08:59:13,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122080325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:13,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527778020] [2021-11-09 08:59:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:13,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:13,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:13,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:13,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:59:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:59:14,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 440 proven. 216 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-09 08:59:16,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527778020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:16,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:16,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-11-09 08:59:16,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937694679] [2021-11-09 08:59:16,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:59:16,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:16,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:59:16,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:59:16,813 INFO L87 Difference]: Start difference. First operand 58421 states and 62871 transitions. Second operand has 7 states, 7 states have (on average 86.14285714285714) internal successors, (603), 7 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:01:23,555 INFO L93 Difference]: Finished difference Result 153918 states and 165806 transitions. [2021-11-09 09:01:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:01:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 86.14285714285714) internal successors, (603), 7 states have internal predecessors, (603), 0 states have call successors, (0), 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 517 [2021-11-09 09:01:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:01:23,659 INFO L225 Difference]: With dead ends: 153918 [2021-11-09 09:01:23,659 INFO L226 Difference]: Without dead ends: 94647 [2021-11-09 09:01:23,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:01:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94647 states. [2021-11-09 09:01:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94647 to 90773. [2021-11-09 09:01:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90773 states, 90772 states have (on average 1.07515533424404) internal successors, (97594), 90772 states have internal predecessors, (97594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90773 states to 90773 states and 97594 transitions. [2021-11-09 09:01:25,494 INFO L78 Accepts]: Start accepts. Automaton has 90773 states and 97594 transitions. Word has length 517 [2021-11-09 09:01:25,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:01:25,495 INFO L470 AbstractCegarLoop]: Abstraction has 90773 states and 97594 transitions. [2021-11-09 09:01:25,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.14285714285714) internal successors, (603), 7 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand 90773 states and 97594 transitions. [2021-11-09 09:01:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2021-11-09 09:01:25,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:01:25,530 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 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] [2021-11-09 09:01:25,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:01:25,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:01:25,756 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:01:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:01:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1510430256, now seen corresponding path program 1 times [2021-11-09 09:01:25,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:01:25,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25572548] [2021-11-09 09:01:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:01:25,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:01:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:01:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-11-09 09:01:26,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:01:26,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25572548] [2021-11-09 09:01:26,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25572548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:01:26,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:01:26,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:01:26,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495944428] [2021-11-09 09:01:26,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:01:26,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:01:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:01:26,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:01:26,014 INFO L87 Difference]: Start difference. First operand 90773 states and 97594 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:01:29,907 INFO L93 Difference]: Finished difference Result 190916 states and 205512 transitions. [2021-11-09 09:01:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:01:29,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 523 [2021-11-09 09:01:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:01:30,034 INFO L225 Difference]: With dead ends: 190916 [2021-11-09 09:01:30,034 INFO L226 Difference]: Without dead ends: 100995 [2021-11-09 09:01:30,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:01:30,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100995 states. [2021-11-09 09:01:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100995 to 100541. [2021-11-09 09:01:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100541 states, 100540 states have (on average 1.0720310324249056) internal successors, (107782), 100540 states have internal predecessors, (107782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100541 states to 100541 states and 107782 transitions. [2021-11-09 09:01:32,117 INFO L78 Accepts]: Start accepts. Automaton has 100541 states and 107782 transitions. Word has length 523 [2021-11-09 09:01:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:01:32,118 INFO L470 AbstractCegarLoop]: Abstraction has 100541 states and 107782 transitions. [2021-11-09 09:01:32,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand 100541 states and 107782 transitions. [2021-11-09 09:01:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2021-11-09 09:01:32,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:01:32,135 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-09 09:01:32,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 09:01:32,135 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:01:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:01:32,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2115029709, now seen corresponding path program 1 times [2021-11-09 09:01:32,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:01:32,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248017149] [2021-11-09 09:01:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:01:32,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:01:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:01:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 923 backedges. 678 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-09 09:01:32,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:01:32,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248017149] [2021-11-09 09:01:32,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248017149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:01:32,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:01:32,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:01:32,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232685838] [2021-11-09 09:01:32,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:01:32,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:01:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:01:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:01:32,444 INFO L87 Difference]: Start difference. First operand 100541 states and 107782 transitions. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:01:38,056 INFO L93 Difference]: Finished difference Result 236842 states and 253835 transitions. [2021-11-09 09:01:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:01:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 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 528 [2021-11-09 09:01:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:01:38,227 INFO L225 Difference]: With dead ends: 236842 [2021-11-09 09:01:38,228 INFO L226 Difference]: Without dead ends: 137153 [2021-11-09 09:01:38,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:01:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137153 states. [2021-11-09 09:01:40,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137153 to 123112. [2021-11-09 09:01:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123112 states, 123111 states have (on average 1.074306926269789) internal successors, (132259), 123111 states have internal predecessors, (132259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123112 states to 123112 states and 132259 transitions. [2021-11-09 09:01:41,209 INFO L78 Accepts]: Start accepts. Automaton has 123112 states and 132259 transitions. Word has length 528 [2021-11-09 09:01:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:01:41,210 INFO L470 AbstractCegarLoop]: Abstraction has 123112 states and 132259 transitions. [2021-11-09 09:01:41,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 123112 states and 132259 transitions. [2021-11-09 09:01:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-11-09 09:01:41,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:01:41,229 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 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] [2021-11-09 09:01:41,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:01:41,229 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:01:41,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:01:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1660032876, now seen corresponding path program 1 times [2021-11-09 09:01:41,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:01:41,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257295482] [2021-11-09 09:01:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:01:41,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:01:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:01:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 686 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-09 09:01:41,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:01:41,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257295482] [2021-11-09 09:01:41,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257295482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:01:41,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:01:41,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:01:41,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109308106] [2021-11-09 09:01:41,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:01:41,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:01:41,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:01:41,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:01:41,520 INFO L87 Difference]: Start difference. First operand 123112 states and 132259 transitions. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:01:46,870 INFO L93 Difference]: Finished difference Result 275162 states and 295100 transitions. [2021-11-09 09:01:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:01:46,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 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 532 [2021-11-09 09:01:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:01:47,073 INFO L225 Difference]: With dead ends: 275162 [2021-11-09 09:01:47,073 INFO L226 Difference]: Without dead ends: 152902 [2021-11-09 09:01:47,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:01:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152902 states. [2021-11-09 09:01:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152902 to 127805. [2021-11-09 09:01:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127805 states, 127804 states have (on average 1.0741369597195707) internal successors, (137279), 127804 states have internal predecessors, (137279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127805 states to 127805 states and 137279 transitions. [2021-11-09 09:01:49,813 INFO L78 Accepts]: Start accepts. Automaton has 127805 states and 137279 transitions. Word has length 532 [2021-11-09 09:01:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:01:49,813 INFO L470 AbstractCegarLoop]: Abstraction has 127805 states and 137279 transitions. [2021-11-09 09:01:49,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 127805 states and 137279 transitions. [2021-11-09 09:01:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2021-11-09 09:01:49,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:01:49,828 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:01:49,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:01:49,828 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:01:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:01:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1540698173, now seen corresponding path program 1 times [2021-11-09 09:01:49,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:01:49,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355004320] [2021-11-09 09:01:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:01:49,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:01:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:01:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 646 proven. 89 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-09 09:01:50,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:01:50,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355004320] [2021-11-09 09:01:50,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355004320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:01:50,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744278546] [2021-11-09 09:01:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:01:50,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:01:50,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:01:50,123 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:01:50,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:01:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:01:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:01:50,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:02:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 873 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-09 09:02:12,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744278546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:02:12,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:02:12,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-09 09:02:12,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550568408] [2021-11-09 09:02:12,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:02:12,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:02:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:02:12,833 INFO L87 Difference]: Start difference. First operand 127805 states and 137279 transitions. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:42,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:02:42,574 INFO L93 Difference]: Finished difference Result 257715 states and 276813 transitions. [2021-11-09 09:02:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:02:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 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 543 [2021-11-09 09:02:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:02:42,724 INFO L225 Difference]: With dead ends: 257715 [2021-11-09 09:02:42,725 INFO L226 Difference]: Without dead ends: 135877 [2021-11-09 09:02:42,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:02:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135877 states. [2021-11-09 09:02:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135877 to 124814. [2021-11-09 09:02:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124814 states, 124813 states have (on average 1.0712425788980315) internal successors, (133705), 124813 states have internal predecessors, (133705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124814 states to 124814 states and 133705 transitions. [2021-11-09 09:02:45,028 INFO L78 Accepts]: Start accepts. Automaton has 124814 states and 133705 transitions. Word has length 543 [2021-11-09 09:02:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:02:45,029 INFO L470 AbstractCegarLoop]: Abstraction has 124814 states and 133705 transitions. [2021-11-09 09:02:45,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:45,029 INFO L276 IsEmpty]: Start isEmpty. Operand 124814 states and 133705 transitions. [2021-11-09 09:02:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2021-11-09 09:02:45,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:02:45,055 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:02:45,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-09 09:02:45,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7e1894-dd26-496c-a4c0-dc3383c56451/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 09:02:45,272 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:02:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:02:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1754804505, now seen corresponding path program 1 times [2021-11-09 09:02:45,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:02:45,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779468702] [2021-11-09 09:02:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:45,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:02:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:02:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-11-09 09:02:45,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:02:45,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779468702] [2021-11-09 09:02:45,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779468702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:02:45,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:02:45,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:02:45,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108266447] [2021-11-09 09:02:45,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:02:45,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:02:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:02:45,523 INFO L87 Difference]: Start difference. First operand 124814 states and 133705 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:02:49,054 INFO L93 Difference]: Finished difference Result 255153 states and 273304 transitions. [2021-11-09 09:02:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:02:49,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 555 [2021-11-09 09:02:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:02:49,692 INFO L225 Difference]: With dead ends: 255153 [2021-11-09 09:02:49,699 INFO L226 Difference]: Without dead ends: 131191 [2021-11-09 09:02:49,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:02:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131191 states. [2021-11-09 09:02:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131191 to 129481. [2021-11-09 09:02:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129481 states, 129480 states have (on average 1.0642029657089898) internal successors, (137793), 129480 states have internal predecessors, (137793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129481 states to 129481 states and 137793 transitions. [2021-11-09 09:02:52,204 INFO L78 Accepts]: Start accepts. Automaton has 129481 states and 137793 transitions. Word has length 555 [2021-11-09 09:02:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:02:52,204 INFO L470 AbstractCegarLoop]: Abstraction has 129481 states and 137793 transitions. [2021-11-09 09:02:52,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 129481 states and 137793 transitions. [2021-11-09 09:02:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-11-09 09:02:52,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:02:52,215 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-09 09:02:52,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 09:02:52,215 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:02:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:02:52,216 INFO L85 PathProgramCache]: Analyzing trace with hash -208962036, now seen corresponding path program 1 times [2021-11-09 09:02:52,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:02:52,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471537796] [2021-11-09 09:02:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:52,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:02:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:02:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-09 09:02:52,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:02:52,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471537796] [2021-11-09 09:02:52,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471537796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:02:52,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:02:52,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:02:52,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017594260] [2021-11-09 09:02:52,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:02:52,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:02:52,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:02:52,476 INFO L87 Difference]: Start difference. First operand 129481 states and 137793 transitions. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:02:55,765 INFO L93 Difference]: Finished difference Result 257649 states and 274129 transitions. [2021-11-09 09:02:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:02:55,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 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 560 [2021-11-09 09:02:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:02:55,929 INFO L225 Difference]: With dead ends: 257649 [2021-11-09 09:02:55,929 INFO L226 Difference]: Without dead ends: 134561 [2021-11-09 09:02:55,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:02:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134561 states. [2021-11-09 09:02:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134561 to 127750. [2021-11-09 09:02:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127750 states, 127749 states have (on average 1.0602353051687292) internal successors, (135444), 127749 states have internal predecessors, (135444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127750 states to 127750 states and 135444 transitions. [2021-11-09 09:02:58,227 INFO L78 Accepts]: Start accepts. Automaton has 127750 states and 135444 transitions. Word has length 560 [2021-11-09 09:02:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:02:58,227 INFO L470 AbstractCegarLoop]: Abstraction has 127750 states and 135444 transitions. [2021-11-09 09:02:58,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 127750 states and 135444 transitions. [2021-11-09 09:02:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2021-11-09 09:02:58,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:02:58,238 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-09 09:02:58,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 09:02:58,239 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:02:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:02:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1801020677, now seen corresponding path program 1 times [2021-11-09 09:02:58,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:02:58,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945885321] [2021-11-09 09:02:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:58,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:02:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:02:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 713 proven. 0 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-11-09 09:02:58,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:02:58,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945885321] [2021-11-09 09:02:58,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945885321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:02:58,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:02:58,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:02:58,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821368313] [2021-11-09 09:02:58,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:02:58,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:02:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:02:58,829 INFO L87 Difference]: Start difference. First operand 127750 states and 135444 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:03:02,599 INFO L93 Difference]: Finished difference Result 269537 states and 286128 transitions. [2021-11-09 09:03:02,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:03:02,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 564 [2021-11-09 09:03:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:03:02,796 INFO L225 Difference]: With dead ends: 269537 [2021-11-09 09:03:02,796 INFO L226 Difference]: Without dead ends: 142639 [2021-11-09 09:03:02,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:03:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142639 states. [2021-11-09 09:03:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142639 to 136674. [2021-11-09 09:03:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136674 states, 136673 states have (on average 1.0508220350764232) internal successors, (143619), 136673 states have internal predecessors, (143619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136674 states to 136674 states and 143619 transitions. [2021-11-09 09:03:05,177 INFO L78 Accepts]: Start accepts. Automaton has 136674 states and 143619 transitions. Word has length 564 [2021-11-09 09:03:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:03:05,178 INFO L470 AbstractCegarLoop]: Abstraction has 136674 states and 143619 transitions. [2021-11-09 09:03:05,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 136674 states and 143619 transitions. [2021-11-09 09:03:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2021-11-09 09:03:05,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:03:05,190 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 09:03:05,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 09:03:05,190 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:03:05,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:03:05,191 INFO L85 PathProgramCache]: Analyzing trace with hash -766780597, now seen corresponding path program 1 times [2021-11-09 09:03:05,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:03:05,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503765537] [2021-11-09 09:03:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:03:05,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:03:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 732 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-09 09:03:05,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:03:05,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503765537] [2021-11-09 09:03:05,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503765537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:03:05,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:03:05,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:03:05,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106281862] [2021-11-09 09:03:05,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:03:05,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:03:05,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:03:05,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:03:05,515 INFO L87 Difference]: Start difference. First operand 136674 states and 143619 transitions. Second operand has 5 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:03:13,159 INFO L93 Difference]: Finished difference Result 289919 states and 303911 transitions. [2021-11-09 09:03:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:03:13,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 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 583 [2021-11-09 09:03:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:03:13,381 INFO L225 Difference]: With dead ends: 289919 [2021-11-09 09:03:13,381 INFO L226 Difference]: Without dead ends: 160914 [2021-11-09 09:03:13,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:03:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160914 states. [2021-11-09 09:03:15,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160914 to 134545. [2021-11-09 09:03:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134545 states, 134544 states have (on average 1.0487498513497444) internal successors, (141103), 134544 states have internal predecessors, (141103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134545 states to 134545 states and 141103 transitions. [2021-11-09 09:03:16,169 INFO L78 Accepts]: Start accepts. Automaton has 134545 states and 141103 transitions. Word has length 583 [2021-11-09 09:03:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:03:16,170 INFO L470 AbstractCegarLoop]: Abstraction has 134545 states and 141103 transitions. [2021-11-09 09:03:16,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 134545 states and 141103 transitions. [2021-11-09 09:03:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2021-11-09 09:03:16,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:03:16,183 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-09 09:03:16,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 09:03:16,184 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:03:16,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:03:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash -858137151, now seen corresponding path program 1 times [2021-11-09 09:03:16,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:03:16,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109446939] [2021-11-09 09:03:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:03:16,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:03:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-09 09:03:16,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:03:16,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109446939] [2021-11-09 09:03:16,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109446939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:03:16,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:03:16,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:03:16,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392153352] [2021-11-09 09:03:16,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:03:16,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:03:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:03:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:03:16,516 INFO L87 Difference]: Start difference. First operand 134545 states and 141103 transitions. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)