./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label23.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label23.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa --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 f8d52330c815f141bcb84aeefc15b1687a66c0b13bb7dfec635891f85eb645e1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:29:29,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:29:29,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:29:29,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:29:29,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:29:29,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:29:29,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:29:29,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:29:29,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:29:29,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:29:29,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:29:29,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:29:29,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:29:29,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:29:29,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:29:30,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:29:30,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:29:30,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:29:30,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:29:30,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:29:30,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:29:30,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:29:30,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:29:30,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:29:30,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:29:30,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:29:30,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:29:30,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:29:30,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:29:30,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:29:30,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:29:30,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:29:30,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:29:30,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:29:30,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:29:30,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:29:30,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:29:30,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:29:30,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:29:30,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:29:30,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:29:30,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 01:29:30,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:29:30,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:29:30,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:29:30,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:29:30,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:29:30,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:29:30,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:29:30,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:29:30,043 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:29:30,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:29:30,043 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:29:30,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:29:30,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:29:30,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:29:30,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:29:30,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:29:30,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:29:30,044 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:29:30,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:29:30,044 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:29:30,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:29:30,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:29:30,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:29:30,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:29:30,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:29:30,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:29:30,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:29:30,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:29:30,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:29:30,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:29:30,046 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:29:30,046 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:29:30,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:29:30,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:29:30,046 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_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d52330c815f141bcb84aeefc15b1687a66c0b13bb7dfec635891f85eb645e1 [2021-12-07 01:29:30,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:29:30,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:29:30,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:29:30,269 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:29:30,269 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:29:30,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem03_label23.c [2021-12-07 01:29:30,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/data/412e744d6/c2750e308794423d9e4f8dd262fa4545/FLAGa5571c167 [2021-12-07 01:29:30,813 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:29:30,814 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/sv-benchmarks/c/eca-rers2012/Problem03_label23.c [2021-12-07 01:29:30,827 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/data/412e744d6/c2750e308794423d9e4f8dd262fa4545/FLAGa5571c167 [2021-12-07 01:29:31,344 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/data/412e744d6/c2750e308794423d9e4f8dd262fa4545 [2021-12-07 01:29:31,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:29:31,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:29:31,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:29:31,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:29:31,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:29:31,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:31,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d25984f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31, skipping insertion in model container [2021-12-07 01:29:31,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:31,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:29:31,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:29:31,780 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/sv-benchmarks/c/eca-rers2012/Problem03_label23.c[57306,57319] [2021-12-07 01:29:31,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:29:31,810 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:29:31,957 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/sv-benchmarks/c/eca-rers2012/Problem03_label23.c[57306,57319] [2021-12-07 01:29:31,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:29:31,979 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:29:31,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31 WrapperNode [2021-12-07 01:29:31,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:29:31,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:29:31,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:29:31,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:29:31,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:32,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:32,063 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-07 01:29:32,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:29:32,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:29:32,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:29:32,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:29:32,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:32,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:32,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:32,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:32,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:32,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:32,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:32,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:29:32,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:29:32,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:29:32,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:29:32,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (1/1) ... [2021-12-07 01:29:32,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:29:32,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:32,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:29:32,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:29:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:29:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:29:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:29:32,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:29:32,259 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:29:32,261 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:29:33,263 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:29:33,273 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:29:33,273 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 01:29:33,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:29:33 BoogieIcfgContainer [2021-12-07 01:29:33,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:29:33,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:29:33,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:29:33,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:29:33,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:29:31" (1/3) ... [2021-12-07 01:29:33,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2607e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:29:33, skipping insertion in model container [2021-12-07 01:29:33,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:29:31" (2/3) ... [2021-12-07 01:29:33,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2607e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:29:33, skipping insertion in model container [2021-12-07 01:29:33,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:29:33" (3/3) ... [2021-12-07 01:29:33,281 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label23.c [2021-12-07 01:29:33,285 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:29:33,285 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:29:33,334 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:29:33,340 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 [2021-12-07 01:29:33,341 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:29:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-07 01:29:33,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:33,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:33,380 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 552287235, now seen corresponding path program 1 times [2021-12-07 01:29:33,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:33,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560946999] [2021-12-07 01:29:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:33,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:33,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:33,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560946999] [2021-12-07 01:29:33,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560946999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:33,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:33,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:33,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368746845] [2021-12-07 01:29:33,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:33,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:33,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:33,836 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:34,594 INFO L93 Difference]: Finished difference Result 835 states and 1478 transitions. [2021-12-07 01:29:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:34,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2021-12-07 01:29:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:34,607 INFO L225 Difference]: With dead ends: 835 [2021-12-07 01:29:34,607 INFO L226 Difference]: Without dead ends: 456 [2021-12-07 01:29:34,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:34,613 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 117 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:34,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 161 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 01:29:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-07 01:29:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2021-12-07 01:29:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5622222222222222) internal successors, (703), 450 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 703 transitions. [2021-12-07 01:29:34,662 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 703 transitions. Word has length 171 [2021-12-07 01:29:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:34,663 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 703 transitions. [2021-12-07 01:29:34,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 703 transitions. [2021-12-07 01:29:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-07 01:29:34,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:34,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:34,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:29:34,669 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:34,670 INFO L85 PathProgramCache]: Analyzing trace with hash 453121461, now seen corresponding path program 1 times [2021-12-07 01:29:34,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:34,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327047932] [2021-12-07 01:29:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:34,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:34,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:34,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327047932] [2021-12-07 01:29:34,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327047932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:34,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:34,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:34,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608248780] [2021-12-07 01:29:34,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:34,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:34,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:34,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:34,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:34,791 INFO L87 Difference]: Start difference. First operand 451 states and 703 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:35,278 INFO L93 Difference]: Finished difference Result 1340 states and 2094 transitions. [2021-12-07 01:29:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:35,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2021-12-07 01:29:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:35,283 INFO L225 Difference]: With dead ends: 1340 [2021-12-07 01:29:35,283 INFO L226 Difference]: Without dead ends: 891 [2021-12-07 01:29:35,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:35,285 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:35,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 154 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:29:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-12-07 01:29:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2021-12-07 01:29:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.5474040632054176) internal successors, (1371), 886 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1371 transitions. [2021-12-07 01:29:35,313 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1371 transitions. Word has length 177 [2021-12-07 01:29:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:35,313 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1371 transitions. [2021-12-07 01:29:35,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1371 transitions. [2021-12-07 01:29:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-07 01:29:35,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:35,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:35,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 01:29:35,318 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash -620762647, now seen corresponding path program 1 times [2021-12-07 01:29:35,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:35,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720729547] [2021-12-07 01:29:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:35,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:35,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720729547] [2021-12-07 01:29:35,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720729547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:35,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:35,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:35,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558905220] [2021-12-07 01:29:35,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:35,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:35,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:35,382 INFO L87 Difference]: Start difference. First operand 887 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:35,930 INFO L93 Difference]: Finished difference Result 2612 states and 4042 transitions. [2021-12-07 01:29:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:35,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-12-07 01:29:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:35,938 INFO L225 Difference]: With dead ends: 2612 [2021-12-07 01:29:35,938 INFO L226 Difference]: Without dead ends: 1727 [2021-12-07 01:29:35,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:35,940 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:35,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 112 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:29:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-12-07 01:29:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2021-12-07 01:29:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.472737819025522) internal successors, (2539), 1724 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2539 transitions. [2021-12-07 01:29:35,975 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2539 transitions. Word has length 181 [2021-12-07 01:29:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:35,975 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 2539 transitions. [2021-12-07 01:29:35,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2539 transitions. [2021-12-07 01:29:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-07 01:29:35,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:35,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:35,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 01:29:35,979 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1890998063, now seen corresponding path program 1 times [2021-12-07 01:29:35,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:35,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613250783] [2021-12-07 01:29:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:35,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:29:36,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:36,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613250783] [2021-12-07 01:29:36,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613250783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:36,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:36,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:36,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155559987] [2021-12-07 01:29:36,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:36,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:36,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:36,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:36,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:36,035 INFO L87 Difference]: Start difference. First operand 1725 states and 2539 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:36,571 INFO L93 Difference]: Finished difference Result 5073 states and 7473 transitions. [2021-12-07 01:29:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 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 183 [2021-12-07 01:29:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:36,586 INFO L225 Difference]: With dead ends: 5073 [2021-12-07 01:29:36,586 INFO L226 Difference]: Without dead ends: 3350 [2021-12-07 01:29:36,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:36,589 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 214 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:36,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 194 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:29:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-12-07 01:29:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 3350. [2021-12-07 01:29:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3349 states have (on average 1.3114362496267542) internal successors, (4392), 3349 states have internal predecessors, (4392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 4392 transitions. [2021-12-07 01:29:36,669 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 4392 transitions. Word has length 183 [2021-12-07 01:29:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:36,670 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 4392 transitions. [2021-12-07 01:29:36,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 4392 transitions. [2021-12-07 01:29:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-07 01:29:36,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:36,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-07 01:29:36,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 01:29:36,675 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash 522709419, now seen corresponding path program 1 times [2021-12-07 01:29:36,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80047630] [2021-12-07 01:29:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:36,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:29:36,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:36,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80047630] [2021-12-07 01:29:36,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80047630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:36,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:36,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:36,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583430954] [2021-12-07 01:29:36,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:36,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:36,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:36,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:36,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:36,733 INFO L87 Difference]: Start difference. First operand 3350 states and 4392 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:37,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:37,327 INFO L93 Difference]: Finished difference Result 9360 states and 12381 transitions. [2021-12-07 01:29:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:37,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 192 [2021-12-07 01:29:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:37,351 INFO L225 Difference]: With dead ends: 9360 [2021-12-07 01:29:37,351 INFO L226 Difference]: Without dead ends: 6012 [2021-12-07 01:29:37,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:37,356 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:37,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 389 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:29:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-12-07 01:29:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6006. [2021-12-07 01:29:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 1.2509575353871774) internal successors, (7512), 6005 states have internal predecessors, (7512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 7512 transitions. [2021-12-07 01:29:37,454 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 7512 transitions. Word has length 192 [2021-12-07 01:29:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:37,454 INFO L470 AbstractCegarLoop]: Abstraction has 6006 states and 7512 transitions. [2021-12-07 01:29:37,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 7512 transitions. [2021-12-07 01:29:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-07 01:29:37,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:37,463 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:37,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 01:29:37,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:37,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:37,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1310007592, now seen corresponding path program 1 times [2021-12-07 01:29:37,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:37,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651947860] [2021-12-07 01:29:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:37,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:29:37,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:37,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651947860] [2021-12-07 01:29:37,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651947860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:37,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:37,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:37,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748147634] [2021-12-07 01:29:37,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:37,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:37,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:37,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:37,535 INFO L87 Difference]: Start difference. First operand 6006 states and 7512 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 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) [2021-12-07 01:29:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:38,081 INFO L93 Difference]: Finished difference Result 17366 states and 21844 transitions. [2021-12-07 01:29:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 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 211 [2021-12-07 01:29:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:38,129 INFO L225 Difference]: With dead ends: 17366 [2021-12-07 01:29:38,129 INFO L226 Difference]: Without dead ends: 11362 [2021-12-07 01:29:38,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:38,134 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:38,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 156 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:29:38,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11362 states. [2021-12-07 01:29:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11362 to 11346. [2021-12-07 01:29:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11346 states, 11345 states have (on average 1.2510356985456148) internal successors, (14193), 11345 states have internal predecessors, (14193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11346 states to 11346 states and 14193 transitions. [2021-12-07 01:29:38,301 INFO L78 Accepts]: Start accepts. Automaton has 11346 states and 14193 transitions. Word has length 211 [2021-12-07 01:29:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:38,301 INFO L470 AbstractCegarLoop]: Abstraction has 11346 states and 14193 transitions. [2021-12-07 01:29:38,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 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) [2021-12-07 01:29:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 11346 states and 14193 transitions. [2021-12-07 01:29:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-07 01:29:38,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:38,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:38,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 01:29:38,332 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:38,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1224459605, now seen corresponding path program 1 times [2021-12-07 01:29:38,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:38,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382091716] [2021-12-07 01:29:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:38,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 01:29:38,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:38,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382091716] [2021-12-07 01:29:38,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382091716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:38,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:38,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:38,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281730988] [2021-12-07 01:29:38,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:38,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:38,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:38,398 INFO L87 Difference]: Start difference. First operand 11346 states and 14193 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:38,988 INFO L93 Difference]: Finished difference Result 32530 states and 40858 transitions. [2021-12-07 01:29:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 211 [2021-12-07 01:29:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:39,050 INFO L225 Difference]: With dead ends: 32530 [2021-12-07 01:29:39,050 INFO L226 Difference]: Without dead ends: 21186 [2021-12-07 01:29:39,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:39,059 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:39,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 176 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:29:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21186 states. [2021-12-07 01:29:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21186 to 21165. [2021-12-07 01:29:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21165 states, 21164 states have (on average 1.2293517293517293) internal successors, (26018), 21164 states have internal predecessors, (26018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21165 states to 21165 states and 26018 transitions. [2021-12-07 01:29:39,301 INFO L78 Accepts]: Start accepts. Automaton has 21165 states and 26018 transitions. Word has length 211 [2021-12-07 01:29:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:39,301 INFO L470 AbstractCegarLoop]: Abstraction has 21165 states and 26018 transitions. [2021-12-07 01:29:39,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 21165 states and 26018 transitions. [2021-12-07 01:29:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-07 01:29:39,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:39,342 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:39,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 01:29:39,343 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash -733869352, now seen corresponding path program 1 times [2021-12-07 01:29:39,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:39,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025702106] [2021-12-07 01:29:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:39,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:29:39,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:39,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025702106] [2021-12-07 01:29:39,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025702106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:39,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:39,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:39,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775040094] [2021-12-07 01:29:39,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:39,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:29:39,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:29:39,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:29:39,418 INFO L87 Difference]: Start difference. First operand 21165 states and 26018 transitions. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:40,315 INFO L93 Difference]: Finished difference Result 72044 states and 89595 transitions. [2021-12-07 01:29:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:29:40,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 216 [2021-12-07 01:29:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:40,381 INFO L225 Difference]: With dead ends: 72044 [2021-12-07 01:29:40,381 INFO L226 Difference]: Without dead ends: 50881 [2021-12-07 01:29:40,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:29:40,398 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 514 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:40,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 522 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 01:29:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50881 states. [2021-12-07 01:29:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50881 to 50854. [2021-12-07 01:29:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50854 states, 50853 states have (on average 1.2254930879200834) internal successors, (62320), 50853 states have internal predecessors, (62320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50854 states to 50854 states and 62320 transitions. [2021-12-07 01:29:40,991 INFO L78 Accepts]: Start accepts. Automaton has 50854 states and 62320 transitions. Word has length 216 [2021-12-07 01:29:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:40,992 INFO L470 AbstractCegarLoop]: Abstraction has 50854 states and 62320 transitions. [2021-12-07 01:29:40,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 50854 states and 62320 transitions. [2021-12-07 01:29:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-07 01:29:41,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:41,063 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:41,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 01:29:41,064 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash 303799372, now seen corresponding path program 1 times [2021-12-07 01:29:41,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:41,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782068489] [2021-12-07 01:29:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:41,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:29:41,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:41,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782068489] [2021-12-07 01:29:41,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782068489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:41,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565203341] [2021-12-07 01:29:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:41,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:41,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:41,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:29:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:41,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:29:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 01:29:41,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:29:41,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565203341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:41,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:41,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-07 01:29:41,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072923638] [2021-12-07 01:29:41,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:41,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:41,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:41,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:41,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:29:41,560 INFO L87 Difference]: Start difference. First operand 50854 states and 62320 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:42,321 INFO L93 Difference]: Finished difference Result 122459 states and 151099 transitions. [2021-12-07 01:29:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 219 [2021-12-07 01:29:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:42,411 INFO L225 Difference]: With dead ends: 122459 [2021-12-07 01:29:42,411 INFO L226 Difference]: Without dead ends: 72622 [2021-12-07 01:29:42,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:29:42,442 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:42,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 201 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:29:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72622 states. [2021-12-07 01:29:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72622 to 72610. [2021-12-07 01:29:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72610 states, 72609 states have (on average 1.2094093018771777) internal successors, (87814), 72609 states have internal predecessors, (87814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72610 states to 72610 states and 87814 transitions. [2021-12-07 01:29:43,174 INFO L78 Accepts]: Start accepts. Automaton has 72610 states and 87814 transitions. Word has length 219 [2021-12-07 01:29:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:43,175 INFO L470 AbstractCegarLoop]: Abstraction has 72610 states and 87814 transitions. [2021-12-07 01:29:43,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 72610 states and 87814 transitions. [2021-12-07 01:29:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-07 01:29:43,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:43,200 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:43,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:29:43,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:43,402 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:43,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:43,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1740772773, now seen corresponding path program 1 times [2021-12-07 01:29:43,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:43,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829034172] [2021-12-07 01:29:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:43,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:29:43,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:43,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829034172] [2021-12-07 01:29:43,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829034172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:29:43,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239123320] [2021-12-07 01:29:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:43,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:43,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:29:43,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:29:43,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:29:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:43,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:29:43,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:29:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:29:43,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:29:43,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239123320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:43,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:29:43,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 01:29:43,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846035923] [2021-12-07 01:29:43,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:43,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:29:43,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:43,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:29:43,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:29:43,939 INFO L87 Difference]: Start difference. First operand 72610 states and 87814 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:44,951 INFO L93 Difference]: Finished difference Result 154465 states and 187940 transitions. [2021-12-07 01:29:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:29:44,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 219 [2021-12-07 01:29:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:45,040 INFO L225 Difference]: With dead ends: 154465 [2021-12-07 01:29:45,040 INFO L226 Difference]: Without dead ends: 82263 [2021-12-07 01:29:45,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:29:45,077 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 570 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:45,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 570 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:29:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82263 states. [2021-12-07 01:29:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82263 to 82173. [2021-12-07 01:29:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82173 states, 82172 states have (on average 1.2141118629216765) internal successors, (99766), 82172 states have internal predecessors, (99766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82173 states to 82173 states and 99766 transitions. [2021-12-07 01:29:45,920 INFO L78 Accepts]: Start accepts. Automaton has 82173 states and 99766 transitions. Word has length 219 [2021-12-07 01:29:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:45,920 INFO L470 AbstractCegarLoop]: Abstraction has 82173 states and 99766 transitions. [2021-12-07 01:29:45,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 82173 states and 99766 transitions. [2021-12-07 01:29:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-07 01:29:45,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:45,953 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:45,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:29:46,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:29:46,155 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:46,156 INFO L85 PathProgramCache]: Analyzing trace with hash 653008864, now seen corresponding path program 1 times [2021-12-07 01:29:46,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:46,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330371161] [2021-12-07 01:29:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:46,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:29:46,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:46,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330371161] [2021-12-07 01:29:46,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330371161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:46,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:46,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:46,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881488614] [2021-12-07 01:29:46,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:46,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:46,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:46,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:46,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:46,366 INFO L87 Difference]: Start difference. First operand 82173 states and 99766 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:47,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:47,319 INFO L93 Difference]: Finished difference Result 206356 states and 251393 transitions. [2021-12-07 01:29:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:47,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 227 [2021-12-07 01:29:47,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:47,461 INFO L225 Difference]: With dead ends: 206356 [2021-12-07 01:29:47,461 INFO L226 Difference]: Without dead ends: 125202 [2021-12-07 01:29:47,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:47,509 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 214 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:47,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 169 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:29:47,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125202 states. [2021-12-07 01:29:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125202 to 125193. [2021-12-07 01:29:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125193 states, 125192 states have (on average 1.1930554668029907) internal successors, (149361), 125192 states have internal predecessors, (149361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125193 states to 125193 states and 149361 transitions. [2021-12-07 01:29:48,932 INFO L78 Accepts]: Start accepts. Automaton has 125193 states and 149361 transitions. Word has length 227 [2021-12-07 01:29:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:48,932 INFO L470 AbstractCegarLoop]: Abstraction has 125193 states and 149361 transitions. [2021-12-07 01:29:48,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 125193 states and 149361 transitions. [2021-12-07 01:29:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-07 01:29:48,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:48,966 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:48,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 01:29:48,966 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1803762388, now seen corresponding path program 1 times [2021-12-07 01:29:48,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:48,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813689029] [2021-12-07 01:29:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:48,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:29:49,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:49,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813689029] [2021-12-07 01:29:49,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813689029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:49,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:49,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:49,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966849501] [2021-12-07 01:29:49,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:49,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:49,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:49,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:49,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:49,047 INFO L87 Difference]: Start difference. First operand 125193 states and 149361 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:50,289 INFO L93 Difference]: Finished difference Result 262034 states and 316213 transitions. [2021-12-07 01:29:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:50,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 237 [2021-12-07 01:29:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:50,430 INFO L225 Difference]: With dead ends: 262034 [2021-12-07 01:29:50,430 INFO L226 Difference]: Without dead ends: 137860 [2021-12-07 01:29:50,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:50,473 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 187 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:50,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 405 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:29:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137860 states. [2021-12-07 01:29:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137860 to 137852. [2021-12-07 01:29:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137852 states, 137851 states have (on average 1.1325634199244112) internal successors, (156125), 137851 states have internal predecessors, (156125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137852 states to 137852 states and 156125 transitions. [2021-12-07 01:29:51,958 INFO L78 Accepts]: Start accepts. Automaton has 137852 states and 156125 transitions. Word has length 237 [2021-12-07 01:29:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:51,958 INFO L470 AbstractCegarLoop]: Abstraction has 137852 states and 156125 transitions. [2021-12-07 01:29:51,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 137852 states and 156125 transitions. [2021-12-07 01:29:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-07 01:29:51,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:51,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:51,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 01:29:51,985 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:51,986 INFO L85 PathProgramCache]: Analyzing trace with hash 242455262, now seen corresponding path program 1 times [2021-12-07 01:29:51,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:51,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746508324] [2021-12-07 01:29:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:51,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:29:52,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:52,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746508324] [2021-12-07 01:29:52,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746508324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:52,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:52,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:29:52,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762246609] [2021-12-07 01:29:52,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:52,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:29:52,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:52,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:29:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:52,058 INFO L87 Difference]: Start difference. First operand 137852 states and 156125 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:53,327 INFO L93 Difference]: Finished difference Result 300986 states and 342322 transitions. [2021-12-07 01:29:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:29:53,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 246 [2021-12-07 01:29:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:53,506 INFO L225 Difference]: With dead ends: 300986 [2021-12-07 01:29:53,506 INFO L226 Difference]: Without dead ends: 164153 [2021-12-07 01:29:53,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:29:53,561 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:53,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 221 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:29:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164153 states. [2021-12-07 01:29:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164153 to 156371. [2021-12-07 01:29:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156371 states, 156370 states have (on average 1.143422651403722) internal successors, (178797), 156370 states have internal predecessors, (178797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156371 states to 156371 states and 178797 transitions. [2021-12-07 01:29:55,378 INFO L78 Accepts]: Start accepts. Automaton has 156371 states and 178797 transitions. Word has length 246 [2021-12-07 01:29:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:29:55,378 INFO L470 AbstractCegarLoop]: Abstraction has 156371 states and 178797 transitions. [2021-12-07 01:29:55,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 156371 states and 178797 transitions. [2021-12-07 01:29:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-07 01:29:55,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:29:55,403 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:29:55,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 01:29:55,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:29:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:29:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash 825721825, now seen corresponding path program 1 times [2021-12-07 01:29:55,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:29:55,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115750596] [2021-12-07 01:29:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:29:55,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:29:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:29:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-07 01:29:55,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:29:55,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115750596] [2021-12-07 01:29:55,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115750596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:29:55,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:29:55,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:29:55,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381339102] [2021-12-07 01:29:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:29:55,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:29:55,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:29:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:29:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:29:55,470 INFO L87 Difference]: Start difference. First operand 156371 states and 178797 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:29:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:29:57,295 INFO L93 Difference]: Finished difference Result 453592 states and 517677 transitions. [2021-12-07 01:29:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:29:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 250 [2021-12-07 01:29:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:29:57,701 INFO L225 Difference]: With dead ends: 453592 [2021-12-07 01:29:57,702 INFO L226 Difference]: Without dead ends: 298445 [2021-12-07 01:29:57,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:29:57,756 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 557 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:29:57,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 389 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:29:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298445 states. [2021-12-07 01:30:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298445 to 298434. [2021-12-07 01:30:00,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298434 states, 298433 states have (on average 1.1392573877553756) internal successors, (339992), 298433 states have internal predecessors, (339992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298434 states to 298434 states and 339992 transitions. [2021-12-07 01:30:01,144 INFO L78 Accepts]: Start accepts. Automaton has 298434 states and 339992 transitions. Word has length 250 [2021-12-07 01:30:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:01,145 INFO L470 AbstractCegarLoop]: Abstraction has 298434 states and 339992 transitions. [2021-12-07 01:30:01,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 298434 states and 339992 transitions. [2021-12-07 01:30:01,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-07 01:30:01,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:01,173 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:01,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 01:30:01,174 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:01,174 INFO L85 PathProgramCache]: Analyzing trace with hash 428661306, now seen corresponding path program 1 times [2021-12-07 01:30:01,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:01,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639035724] [2021-12-07 01:30:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:01,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 01:30:01,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639035724] [2021-12-07 01:30:01,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639035724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:01,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:01,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:30:01,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617509800] [2021-12-07 01:30:01,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:01,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:01,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:01,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:01,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:01,249 INFO L87 Difference]: Start difference. First operand 298434 states and 339992 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:03,346 INFO L93 Difference]: Finished difference Result 600382 states and 687575 transitions. [2021-12-07 01:30:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:03,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 270 [2021-12-07 01:30:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:03,693 INFO L225 Difference]: With dead ends: 600382 [2021-12-07 01:30:03,693 INFO L226 Difference]: Without dead ends: 287135 [2021-12-07 01:30:03,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:03,799 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 175 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:03,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 386 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:30:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287135 states. [2021-12-07 01:30:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287135 to 191972. [2021-12-07 01:30:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191972 states, 191971 states have (on average 1.1320459861124856) internal successors, (217320), 191971 states have internal predecessors, (217320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191972 states to 191972 states and 217320 transitions. [2021-12-07 01:30:06,581 INFO L78 Accepts]: Start accepts. Automaton has 191972 states and 217320 transitions. Word has length 270 [2021-12-07 01:30:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:06,582 INFO L470 AbstractCegarLoop]: Abstraction has 191972 states and 217320 transitions. [2021-12-07 01:30:06,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:06,582 INFO L276 IsEmpty]: Start isEmpty. Operand 191972 states and 217320 transitions. [2021-12-07 01:30:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-12-07 01:30:06,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:06,602 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:06,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 01:30:06,602 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:06,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1278404839, now seen corresponding path program 1 times [2021-12-07 01:30:06,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:06,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757598577] [2021-12-07 01:30:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:06,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:30:06,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:06,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757598577] [2021-12-07 01:30:06,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757598577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:06,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116545387] [2021-12-07 01:30:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:06,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:06,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:06,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:06,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:30:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:06,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:30:06,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:30:07,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:30:07,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116545387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:07,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:30:07,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 01:30:07,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63607732] [2021-12-07 01:30:07,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:07,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:07,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:30:07,215 INFO L87 Difference]: Start difference. First operand 191972 states and 217320 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:08,506 INFO L93 Difference]: Finished difference Result 376391 states and 426365 transitions. [2021-12-07 01:30:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:08,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 279 [2021-12-07 01:30:08,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:08,710 INFO L225 Difference]: With dead ends: 376391 [2021-12-07 01:30:08,711 INFO L226 Difference]: Without dead ends: 185438 [2021-12-07 01:30:08,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:30:08,771 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 100 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:08,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 334 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:30:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185438 states. [2021-12-07 01:30:10,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185438 to 181165. [2021-12-07 01:30:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181165 states, 181164 states have (on average 1.1190081914729195) internal successors, (202724), 181164 states have internal predecessors, (202724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181165 states to 181165 states and 202724 transitions. [2021-12-07 01:30:10,951 INFO L78 Accepts]: Start accepts. Automaton has 181165 states and 202724 transitions. Word has length 279 [2021-12-07 01:30:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:10,952 INFO L470 AbstractCegarLoop]: Abstraction has 181165 states and 202724 transitions. [2021-12-07 01:30:10,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 181165 states and 202724 transitions. [2021-12-07 01:30:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-07 01:30:10,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:10,979 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:10,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:30:11,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:11,180 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1304360969, now seen corresponding path program 1 times [2021-12-07 01:30:11,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:11,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368521281] [2021-12-07 01:30:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:11,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:30:11,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:11,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368521281] [2021-12-07 01:30:11,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368521281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:11,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:11,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:30:11,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224285383] [2021-12-07 01:30:11,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:11,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:11,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:11,439 INFO L87 Difference]: Start difference. First operand 181165 states and 202724 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:12,677 INFO L93 Difference]: Finished difference Result 343389 states and 383179 transitions. [2021-12-07 01:30:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:12,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 283 [2021-12-07 01:30:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:12,845 INFO L225 Difference]: With dead ends: 343389 [2021-12-07 01:30:12,845 INFO L226 Difference]: Without dead ends: 159794 [2021-12-07 01:30:12,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:12,899 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 244 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:12,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 353 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:30:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159794 states. [2021-12-07 01:30:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159794 to 139271. [2021-12-07 01:30:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139271 states, 139270 states have (on average 1.0925971135204997) internal successors, (152166), 139270 states have internal predecessors, (152166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139271 states to 139271 states and 152166 transitions. [2021-12-07 01:30:14,551 INFO L78 Accepts]: Start accepts. Automaton has 139271 states and 152166 transitions. Word has length 283 [2021-12-07 01:30:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:14,552 INFO L470 AbstractCegarLoop]: Abstraction has 139271 states and 152166 transitions. [2021-12-07 01:30:14,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 139271 states and 152166 transitions. [2021-12-07 01:30:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-12-07 01:30:14,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:14,571 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:14,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 01:30:14,571 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash -890870113, now seen corresponding path program 1 times [2021-12-07 01:30:14,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:14,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377915227] [2021-12-07 01:30:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:14,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 01:30:14,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:14,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377915227] [2021-12-07 01:30:14,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377915227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:14,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:14,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:30:14,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174278587] [2021-12-07 01:30:14,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:14,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:30:14,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:30:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:30:14,663 INFO L87 Difference]: Start difference. First operand 139271 states and 152166 transitions. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:16,135 INFO L93 Difference]: Finished difference Result 286310 states and 313223 transitions. [2021-12-07 01:30:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:30:16,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 290 [2021-12-07 01:30:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:16,273 INFO L225 Difference]: With dead ends: 286310 [2021-12-07 01:30:16,273 INFO L226 Difference]: Without dead ends: 147047 [2021-12-07 01:30:16,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:30:16,312 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 403 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:16,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 137 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 01:30:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147047 states. [2021-12-07 01:30:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147047 to 144342. [2021-12-07 01:30:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144342 states, 144341 states have (on average 1.0937225043473442) internal successors, (157869), 144341 states have internal predecessors, (157869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144342 states to 144342 states and 157869 transitions. [2021-12-07 01:30:17,897 INFO L78 Accepts]: Start accepts. Automaton has 144342 states and 157869 transitions. Word has length 290 [2021-12-07 01:30:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:17,897 INFO L470 AbstractCegarLoop]: Abstraction has 144342 states and 157869 transitions. [2021-12-07 01:30:17,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 144342 states and 157869 transitions. [2021-12-07 01:30:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-12-07 01:30:17,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:17,912 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:17,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-07 01:30:17,913 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:17,913 INFO L85 PathProgramCache]: Analyzing trace with hash 791447635, now seen corresponding path program 1 times [2021-12-07 01:30:17,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:17,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324931212] [2021-12-07 01:30:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:17,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 01:30:18,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:18,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324931212] [2021-12-07 01:30:18,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324931212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:18,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:18,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:30:18,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270590557] [2021-12-07 01:30:18,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:18,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:18,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:18,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:18,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:18,002 INFO L87 Difference]: Start difference. First operand 144342 states and 157869 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:18,850 INFO L93 Difference]: Finished difference Result 243611 states and 265953 transitions. [2021-12-07 01:30:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 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 296 [2021-12-07 01:30:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:18,952 INFO L225 Difference]: With dead ends: 243611 [2021-12-07 01:30:18,952 INFO L226 Difference]: Without dead ends: 100495 [2021-12-07 01:30:18,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:18,994 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 235 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:18,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 31 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:30:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100495 states. [2021-12-07 01:30:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100495 to 96425. [2021-12-07 01:30:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96425 states, 96424 states have (on average 1.0830187505185431) internal successors, (104429), 96424 states have internal predecessors, (104429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96425 states to 96425 states and 104429 transitions. [2021-12-07 01:30:20,136 INFO L78 Accepts]: Start accepts. Automaton has 96425 states and 104429 transitions. Word has length 296 [2021-12-07 01:30:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:20,136 INFO L470 AbstractCegarLoop]: Abstraction has 96425 states and 104429 transitions. [2021-12-07 01:30:20,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 96425 states and 104429 transitions. [2021-12-07 01:30:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-12-07 01:30:20,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:20,148 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:20,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 01:30:20,148 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1344929822, now seen corresponding path program 1 times [2021-12-07 01:30:20,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:20,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092758159] [2021-12-07 01:30:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:20,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:30:20,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:20,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092758159] [2021-12-07 01:30:20,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092758159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:20,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:20,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:30:20,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735577311] [2021-12-07 01:30:20,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:20,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:20,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:20,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:20,230 INFO L87 Difference]: Start difference. First operand 96425 states and 104429 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 2 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:21,117 INFO L93 Difference]: Finished difference Result 206093 states and 223099 transitions. [2021-12-07 01:30:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:21,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 2 states have internal predecessors, (287), 0 states have call successors, (0), 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 298 [2021-12-07 01:30:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:21,223 INFO L225 Difference]: With dead ends: 206093 [2021-12-07 01:30:21,223 INFO L226 Difference]: Without dead ends: 110689 [2021-12-07 01:30:21,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:21,265 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 118 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:21,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 102 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:30:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110689 states. [2021-12-07 01:30:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110689 to 106422. [2021-12-07 01:30:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106422 states, 106421 states have (on average 1.083996579622443) internal successors, (115360), 106421 states have internal predecessors, (115360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106422 states to 106422 states and 115360 transitions. [2021-12-07 01:30:22,497 INFO L78 Accepts]: Start accepts. Automaton has 106422 states and 115360 transitions. Word has length 298 [2021-12-07 01:30:22,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:22,498 INFO L470 AbstractCegarLoop]: Abstraction has 106422 states and 115360 transitions. [2021-12-07 01:30:22,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 2 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:22,498 INFO L276 IsEmpty]: Start isEmpty. Operand 106422 states and 115360 transitions. [2021-12-07 01:30:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-12-07 01:30:22,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:22,631 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:22,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-07 01:30:22,632 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1239585511, now seen corresponding path program 1 times [2021-12-07 01:30:22,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:22,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299480467] [2021-12-07 01:30:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:22,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 01:30:22,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299480467] [2021-12-07 01:30:22,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299480467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:22,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:22,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:30:22,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505438847] [2021-12-07 01:30:22,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:22,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:22,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:22,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:22,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:22,728 INFO L87 Difference]: Start difference. First operand 106422 states and 115360 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:23,567 INFO L93 Difference]: Finished difference Result 212027 states and 229858 transitions. [2021-12-07 01:30:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:23,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 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 299 [2021-12-07 01:30:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:23,679 INFO L225 Difference]: With dead ends: 212027 [2021-12-07 01:30:23,679 INFO L226 Difference]: Without dead ends: 106626 [2021-12-07 01:30:23,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:23,728 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:23,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 132 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:30:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106626 states. [2021-12-07 01:30:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106626 to 106625. [2021-12-07 01:30:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106625 states, 106624 states have (on average 1.083874174669868) internal successors, (115567), 106624 states have internal predecessors, (115567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106625 states to 106625 states and 115567 transitions. [2021-12-07 01:30:24,977 INFO L78 Accepts]: Start accepts. Automaton has 106625 states and 115567 transitions. Word has length 299 [2021-12-07 01:30:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:24,977 INFO L470 AbstractCegarLoop]: Abstraction has 106625 states and 115567 transitions. [2021-12-07 01:30:24,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 106625 states and 115567 transitions. [2021-12-07 01:30:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-07 01:30:24,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:24,992 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:24,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-07 01:30:24,992 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1943248407, now seen corresponding path program 1 times [2021-12-07 01:30:24,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:24,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482276083] [2021-12-07 01:30:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:24,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 142 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:30:25,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:25,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482276083] [2021-12-07 01:30:25,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482276083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:25,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442800249] [2021-12-07 01:30:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:25,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:25,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:25,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:25,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:30:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:25,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:30:25,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:30:25,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:30:25,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442800249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:25,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:30:25,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 01:30:25,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126793428] [2021-12-07 01:30:25,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:25,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:25,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:30:25,529 INFO L87 Difference]: Start difference. First operand 106625 states and 115567 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:26,232 INFO L93 Difference]: Finished difference Result 277500 states and 301056 transitions. [2021-12-07 01:30:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 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 303 [2021-12-07 01:30:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:26,400 INFO L225 Difference]: With dead ends: 277500 [2021-12-07 01:30:26,400 INFO L226 Difference]: Without dead ends: 172099 [2021-12-07 01:30:26,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:30:26,456 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 256 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:26,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 747 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:30:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172099 states. [2021-12-07 01:30:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172099 to 170874. [2021-12-07 01:30:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170874 states, 170873 states have (on average 1.0782159849712944) internal successors, (184238), 170873 states have internal predecessors, (184238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170874 states to 170874 states and 184238 transitions. [2021-12-07 01:30:28,551 INFO L78 Accepts]: Start accepts. Automaton has 170874 states and 184238 transitions. Word has length 303 [2021-12-07 01:30:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:28,551 INFO L470 AbstractCegarLoop]: Abstraction has 170874 states and 184238 transitions. [2021-12-07 01:30:28,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 170874 states and 184238 transitions. [2021-12-07 01:30:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-12-07 01:30:28,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:28,570 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:28,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:30:28,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-07 01:30:28,773 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:28,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:28,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1919885517, now seen corresponding path program 1 times [2021-12-07 01:30:28,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:28,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080800022] [2021-12-07 01:30:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:28,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 139 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:30:28,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:28,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080800022] [2021-12-07 01:30:28,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080800022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:28,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386378934] [2021-12-07 01:30:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:28,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:28,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:28,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:28,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:30:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:29,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:30:29,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:30:29,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:30:29,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386378934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:29,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:30:29,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-12-07 01:30:29,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417931830] [2021-12-07 01:30:29,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:29,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:30:29,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:30:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:30:29,344 INFO L87 Difference]: Start difference. First operand 170874 states and 184238 transitions. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:30,656 INFO L93 Difference]: Finished difference Result 343808 states and 370748 transitions. [2021-12-07 01:30:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:30:30,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 305 [2021-12-07 01:30:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:30,828 INFO L225 Difference]: With dead ends: 343808 [2021-12-07 01:30:30,828 INFO L226 Difference]: Without dead ends: 174158 [2021-12-07 01:30:30,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:30:30,900 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 628 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:30,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 313 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:30:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174158 states. [2021-12-07 01:30:32,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174158 to 168422. [2021-12-07 01:30:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168422 states, 168421 states have (on average 1.0768372115116287) internal successors, (181362), 168421 states have internal predecessors, (181362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168422 states to 168422 states and 181362 transitions. [2021-12-07 01:30:33,073 INFO L78 Accepts]: Start accepts. Automaton has 168422 states and 181362 transitions. Word has length 305 [2021-12-07 01:30:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:33,073 INFO L470 AbstractCegarLoop]: Abstraction has 168422 states and 181362 transitions. [2021-12-07 01:30:33,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand 168422 states and 181362 transitions. [2021-12-07 01:30:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-07 01:30:33,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:33,101 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:33,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:30:33,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:33,303 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:33,304 INFO L85 PathProgramCache]: Analyzing trace with hash -894730181, now seen corresponding path program 1 times [2021-12-07 01:30:33,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:33,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210083011] [2021-12-07 01:30:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:33,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-07 01:30:33,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:33,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210083011] [2021-12-07 01:30:33,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210083011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:33,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:33,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:30:33,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783760354] [2021-12-07 01:30:33,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:33,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:30:33,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:33,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:30:33,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:30:33,421 INFO L87 Difference]: Start difference. First operand 168422 states and 181362 transitions. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:34,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:34,871 INFO L93 Difference]: Finished difference Result 343999 states and 370505 transitions. [2021-12-07 01:30:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:30:34,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 309 [2021-12-07 01:30:34,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:35,066 INFO L225 Difference]: With dead ends: 343999 [2021-12-07 01:30:35,066 INFO L226 Difference]: Without dead ends: 174566 [2021-12-07 01:30:35,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:30:35,129 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 360 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:35,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 108 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:30:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174566 states. [2021-12-07 01:30:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174566 to 154164. [2021-12-07 01:30:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154164 states, 154163 states have (on average 1.077139131957733) internal successors, (166055), 154163 states have internal predecessors, (166055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154164 states to 154164 states and 166055 transitions. [2021-12-07 01:30:37,058 INFO L78 Accepts]: Start accepts. Automaton has 154164 states and 166055 transitions. Word has length 309 [2021-12-07 01:30:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:37,058 INFO L470 AbstractCegarLoop]: Abstraction has 154164 states and 166055 transitions. [2021-12-07 01:30:37,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 154164 states and 166055 transitions. [2021-12-07 01:30:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-07 01:30:37,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:37,068 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:37,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-07 01:30:37,068 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:37,069 INFO L85 PathProgramCache]: Analyzing trace with hash 54050235, now seen corresponding path program 1 times [2021-12-07 01:30:37,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:37,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41305099] [2021-12-07 01:30:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:37,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 143 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:30:37,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:37,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41305099] [2021-12-07 01:30:37,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41305099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:37,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234746141] [2021-12-07 01:30:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:37,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:37,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:37,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:37,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:30:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:37,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:30:37,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:30:37,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:30:37,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234746141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:37,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:30:37,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-07 01:30:37,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055099063] [2021-12-07 01:30:37,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:37,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:37,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:37,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:37,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:30:37,477 INFO L87 Difference]: Start difference. First operand 154164 states and 166055 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:38,691 INFO L93 Difference]: Finished difference Result 445013 states and 479367 transitions. [2021-12-07 01:30:38,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:38,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 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 311 [2021-12-07 01:30:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:39,011 INFO L225 Difference]: With dead ends: 445013 [2021-12-07 01:30:39,011 INFO L226 Difference]: Without dead ends: 292070 [2021-12-07 01:30:39,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:30:39,083 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 185 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:39,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 483 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:30:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292070 states. [2021-12-07 01:30:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292070 to 283726. [2021-12-07 01:30:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283726 states, 283725 states have (on average 1.0761476782095338) internal successors, (305330), 283725 states have internal predecessors, (305330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:42,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283726 states to 283726 states and 305330 transitions. [2021-12-07 01:30:42,329 INFO L78 Accepts]: Start accepts. Automaton has 283726 states and 305330 transitions. Word has length 311 [2021-12-07 01:30:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:42,330 INFO L470 AbstractCegarLoop]: Abstraction has 283726 states and 305330 transitions. [2021-12-07 01:30:42,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:42,330 INFO L276 IsEmpty]: Start isEmpty. Operand 283726 states and 305330 transitions. [2021-12-07 01:30:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-07 01:30:42,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:42,340 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:42,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:30:42,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 01:30:42,542 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1294083335, now seen corresponding path program 1 times [2021-12-07 01:30:42,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:42,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921750337] [2021-12-07 01:30:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:42,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:30:42,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:42,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921750337] [2021-12-07 01:30:42,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921750337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:42,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:42,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:30:42,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417984311] [2021-12-07 01:30:42,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:42,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:30:42,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:42,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:30:42,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:30:42,671 INFO L87 Difference]: Start difference. First operand 283726 states and 305330 transitions. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:44,589 INFO L93 Difference]: Finished difference Result 568929 states and 612787 transitions. [2021-12-07 01:30:44,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:30:44,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 311 [2021-12-07 01:30:44,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:44,867 INFO L225 Difference]: With dead ends: 568929 [2021-12-07 01:30:44,867 INFO L226 Difference]: Without dead ends: 271604 [2021-12-07 01:30:44,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:30:44,939 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 345 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:44,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 52 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 01:30:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271604 states. [2021-12-07 01:30:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271604 to 246103. [2021-12-07 01:30:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246103 states, 246102 states have (on average 1.0687560442418185) internal successors, (263023), 246102 states have internal predecessors, (263023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246103 states to 246103 states and 263023 transitions. [2021-12-07 01:30:47,967 INFO L78 Accepts]: Start accepts. Automaton has 246103 states and 263023 transitions. Word has length 311 [2021-12-07 01:30:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:47,967 INFO L470 AbstractCegarLoop]: Abstraction has 246103 states and 263023 transitions. [2021-12-07 01:30:47,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 246103 states and 263023 transitions. [2021-12-07 01:30:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-07 01:30:47,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:47,977 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:47,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-07 01:30:47,977 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:47,977 INFO L85 PathProgramCache]: Analyzing trace with hash -202236404, now seen corresponding path program 1 times [2021-12-07 01:30:47,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:47,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038057029] [2021-12-07 01:30:47,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:47,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:30:48,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:48,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038057029] [2021-12-07 01:30:48,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038057029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:30:48,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:30:48,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:30:48,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390829907] [2021-12-07 01:30:48,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:30:48,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:30:48,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:30:48,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:48,077 INFO L87 Difference]: Start difference. First operand 246103 states and 263023 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:49,489 INFO L93 Difference]: Finished difference Result 491799 states and 525628 transitions. [2021-12-07 01:30:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:30:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 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 322 [2021-12-07 01:30:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:49,747 INFO L225 Difference]: With dead ends: 491799 [2021-12-07 01:30:49,748 INFO L226 Difference]: Without dead ends: 246510 [2021-12-07 01:30:50,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:30:50,050 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:50,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 124 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:30:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246510 states. [2021-12-07 01:30:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246510 to 246509. [2021-12-07 01:30:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246509 states, 246508 states have (on average 1.0686590293215636) internal successors, (263433), 246508 states have internal predecessors, (263433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246509 states to 246509 states and 263433 transitions. [2021-12-07 01:30:52,649 INFO L78 Accepts]: Start accepts. Automaton has 246509 states and 263433 transitions. Word has length 322 [2021-12-07 01:30:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:30:52,649 INFO L470 AbstractCegarLoop]: Abstraction has 246509 states and 263433 transitions. [2021-12-07 01:30:52,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 246509 states and 263433 transitions. [2021-12-07 01:30:52,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-12-07 01:30:52,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:30:52,662 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:30:52,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-07 01:30:52,662 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:30:52,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:30:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1097150161, now seen corresponding path program 1 times [2021-12-07 01:30:52,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:30:52,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729515874] [2021-12-07 01:30:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:52,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:30:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 191 proven. 48 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:30:52,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:30:52,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729515874] [2021-12-07 01:30:52,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729515874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:30:52,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052445347] [2021-12-07 01:30:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:30:52,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:30:52,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:30:52,952 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:30:52,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:30:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:30:53,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:30:53,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:30:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-07 01:30:53,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:30:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-07 01:30:53,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052445347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:30:53,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:30:53,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-12-07 01:30:53,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101981908] [2021-12-07 01:30:53,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:30:53,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:30:53,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:30:53,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:30:53,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:30:53,760 INFO L87 Difference]: Start difference. First operand 246509 states and 263433 transitions. Second operand has 7 states, 7 states have (on average 98.85714285714286) internal successors, (692), 6 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:30:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:30:58,407 INFO L93 Difference]: Finished difference Result 803345 states and 857913 transitions. [2021-12-07 01:30:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 01:30:58,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 98.85714285714286) internal successors, (692), 6 states have internal predecessors, (692), 0 states have call successors, (0), 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 342 [2021-12-07 01:30:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:30:59,044 INFO L225 Difference]: With dead ends: 803345 [2021-12-07 01:30:59,044 INFO L226 Difference]: Without dead ends: 557244 [2021-12-07 01:30:59,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:30:59,132 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 2571 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 3865 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2571 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 4472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 3865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:30:59,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2571 Valid, 368 Invalid, 4472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 3865 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-07 01:30:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557244 states. [2021-12-07 01:31:03,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557244 to 309322. [2021-12-07 01:31:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309322 states, 309321 states have (on average 1.0596370760472131) internal successors, (327768), 309321 states have internal predecessors, (327768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309322 states to 309322 states and 327768 transitions. [2021-12-07 01:31:04,197 INFO L78 Accepts]: Start accepts. Automaton has 309322 states and 327768 transitions. Word has length 342 [2021-12-07 01:31:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:31:04,197 INFO L470 AbstractCegarLoop]: Abstraction has 309322 states and 327768 transitions. [2021-12-07 01:31:04,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.85714285714286) internal successors, (692), 6 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 309322 states and 327768 transitions. [2021-12-07 01:31:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-12-07 01:31:04,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:31:04,206 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:31:04,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:31:04,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 01:31:04,408 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:31:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:31:04,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1442652516, now seen corresponding path program 1 times [2021-12-07 01:31:04,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:31:04,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801676667] [2021-12-07 01:31:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:04,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:31:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-07 01:31:04,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:31:04,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801676667] [2021-12-07 01:31:04,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801676667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:31:04,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:31:04,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:31:04,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490657155] [2021-12-07 01:31:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:31:04,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:31:04,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:31:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:31:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:31:04,521 INFO L87 Difference]: Start difference. First operand 309322 states and 327768 transitions. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:06,484 INFO L93 Difference]: Finished difference Result 619676 states and 656908 transitions. [2021-12-07 01:31:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:31:06,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 362 [2021-12-07 01:31:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:06,832 INFO L225 Difference]: With dead ends: 619676 [2021-12-07 01:31:06,832 INFO L226 Difference]: Without dead ends: 311574 [2021-12-07 01:31:06,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:31:06,937 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 463 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:06,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 48 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:31:07,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311574 states. [2021-12-07 01:31:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311574 to 263555. [2021-12-07 01:31:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263555 states, 263554 states have (on average 1.0545429020238737) internal successors, (277929), 263554 states have internal predecessors, (277929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263555 states to 263555 states and 277929 transitions. [2021-12-07 01:31:10,371 INFO L78 Accepts]: Start accepts. Automaton has 263555 states and 277929 transitions. Word has length 362 [2021-12-07 01:31:10,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:31:10,371 INFO L470 AbstractCegarLoop]: Abstraction has 263555 states and 277929 transitions. [2021-12-07 01:31:10,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 263555 states and 277929 transitions. [2021-12-07 01:31:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-12-07 01:31:10,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:31:10,380 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:31:10,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-07 01:31:10,380 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:31:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:31:10,381 INFO L85 PathProgramCache]: Analyzing trace with hash -984125212, now seen corresponding path program 1 times [2021-12-07 01:31:10,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:31:10,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989481814] [2021-12-07 01:31:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:10,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:31:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 214 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 01:31:10,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:31:10,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989481814] [2021-12-07 01:31:10,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989481814] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:31:10,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079710840] [2021-12-07 01:31:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:10,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:31:10,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:31:10,493 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:31:10,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:31:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:31:10,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:31:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-07 01:31:10,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:31:10,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079710840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:31:10,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:31:10,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-07 01:31:10,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882584138] [2021-12-07 01:31:10,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:31:10,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:31:10,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:31:10,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:31:10,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:31:10,853 INFO L87 Difference]: Start difference. First operand 263555 states and 277929 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:12,495 INFO L93 Difference]: Finished difference Result 527551 states and 556182 transitions. [2021-12-07 01:31:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:31:12,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 364 [2021-12-07 01:31:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:12,779 INFO L225 Difference]: With dead ends: 527551 [2021-12-07 01:31:12,779 INFO L226 Difference]: Without dead ends: 263186 [2021-12-07 01:31:12,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:31:12,874 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 210 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:12,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 328 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:31:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263186 states. [2021-12-07 01:31:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263186 to 259077. [2021-12-07 01:31:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259077 states, 259076 states have (on average 1.0508036251910635) internal successors, (272238), 259076 states have internal predecessors, (272238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259077 states to 259077 states and 272238 transitions. [2021-12-07 01:31:16,095 INFO L78 Accepts]: Start accepts. Automaton has 259077 states and 272238 transitions. Word has length 364 [2021-12-07 01:31:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:31:16,096 INFO L470 AbstractCegarLoop]: Abstraction has 259077 states and 272238 transitions. [2021-12-07 01:31:16,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:16,096 INFO L276 IsEmpty]: Start isEmpty. Operand 259077 states and 272238 transitions. [2021-12-07 01:31:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-12-07 01:31:16,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:31:16,107 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:31:16,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:31:16,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf4a507-7fd1-4f52-a069-a98e6345e84f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:31:16,309 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:31:16,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:31:16,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1927647257, now seen corresponding path program 1 times [2021-12-07 01:31:16,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:31:16,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260962617] [2021-12-07 01:31:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:31:16,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:31:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:31:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-07 01:31:16,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:31:16,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260962617] [2021-12-07 01:31:16,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260962617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:31:16,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:31:16,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:31:16,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054085400] [2021-12-07 01:31:16,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:31:16,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:31:16,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:31:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:31:16,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:31:16,466 INFO L87 Difference]: Start difference. First operand 259077 states and 272238 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:31:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:31:18,020 INFO L93 Difference]: Finished difference Result 473249 states and 497624 transitions. [2021-12-07 01:31:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:31:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 373 [2021-12-07 01:31:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:31:18,263 INFO L225 Difference]: With dead ends: 473249 [2021-12-07 01:31:18,264 INFO L226 Difference]: Without dead ends: 212948 [2021-12-07 01:31:18,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:31:18,356 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 224 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:31:18,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 314 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:31:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212948 states.