./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF --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 9ab20fd2c170582703dc94cfdcd8e10a79137aac9ab76b1936884b512261ae10 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:27:45,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:27:45,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:27:45,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:27:45,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:27:45,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:27:45,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:27:45,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:27:45,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:27:45,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:27:45,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:27:45,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:27:45,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:27:45,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:27:45,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:27:45,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:27:45,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:27:45,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:27:45,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:27:45,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:27:45,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:27:45,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:27:45,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:27:45,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:27:45,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:27:45,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:27:45,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:27:45,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:27:45,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:27:45,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:27:45,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:27:45,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:27:45,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:27:45,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:27:45,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:27:45,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:27:45,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:27:45,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:27:45,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:27:45,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:27:45,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:27:45,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:27:45,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:27:45,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:27:45,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:27:45,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:27:45,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:27:45,241 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:27:45,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:27:45,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:27:45,242 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:27:45,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:27:45,243 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:27:45,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:27:45,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:27:45,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:27:45,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:27:45,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:27:45,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:27:45,245 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:27:45,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:27:45,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:27:45,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:27:45,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:27:45,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:27:45,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:27:45,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:27:45,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:27:45,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:27:45,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:27:45,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:27:45,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:27:45,249 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:27:45,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:27:45,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:27:45,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:27:45,250 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_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ab20fd2c170582703dc94cfdcd8e10a79137aac9ab76b1936884b512261ae10 [2021-11-20 06:27:45,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:27:45,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:27:45,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:27:45,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:27:45,612 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:27:45,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem17_label05.c [2021-11-20 06:27:45,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/data/77a635b8b/ee56762247ad41b0ba422e4dbd19e367/FLAG1e846a47a [2021-11-20 06:27:46,508 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:27:46,509 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/sv-benchmarks/c/eca-rers2012/Problem17_label05.c [2021-11-20 06:27:46,543 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/data/77a635b8b/ee56762247ad41b0ba422e4dbd19e367/FLAG1e846a47a [2021-11-20 06:27:47,054 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/data/77a635b8b/ee56762247ad41b0ba422e4dbd19e367 [2021-11-20 06:27:47,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:27:47,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:27:47,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:27:47,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:27:47,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:27:47,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:27:47" (1/1) ... [2021-11-20 06:27:47,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ad5169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:47, skipping insertion in model container [2021-11-20 06:27:47,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:27:47" (1/1) ... [2021-11-20 06:27:47,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:27:47,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:27:47,504 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_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/sv-benchmarks/c/eca-rers2012/Problem17_label05.c[9078,9091] [2021-11-20 06:27:48,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:27:48,283 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:27:48,331 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_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/sv-benchmarks/c/eca-rers2012/Problem17_label05.c[9078,9091] [2021-11-20 06:27:48,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:27:48,765 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:27:48,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48 WrapperNode [2021-11-20 06:27:48,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:27:48,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:27:48,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:27:48,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:27:48,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (1/1) ... [2021-11-20 06:27:48,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (1/1) ... [2021-11-20 06:27:49,205 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-20 06:27:49,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:27:49,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:27:49,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:27:49,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:27:49,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (1/1) ... [2021-11-20 06:27:49,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (1/1) ... [2021-11-20 06:27:49,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (1/1) ... [2021-11-20 06:27:49,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (1/1) ... [2021-11-20 06:27:49,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (1/1) ... [2021-11-20 06:27:49,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (1/1) ... [2021-11-20 06:27:49,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (1/1) ... [2021-11-20 06:27:49,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:27:49,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:27:49,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:27:49,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:27:49,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (1/1) ... [2021-11-20 06:27:49,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:27:49,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:49,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:27:49,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:27:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:27:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:27:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:27:49,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:27:49,829 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:27:49,831 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:27:54,208 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:27:54,223 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:27:54,223 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:27:54,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:27:54 BoogieIcfgContainer [2021-11-20 06:27:54,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:27:54,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:27:54,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:27:54,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:27:54,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:27:47" (1/3) ... [2021-11-20 06:27:54,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a21d596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:27:54, skipping insertion in model container [2021-11-20 06:27:54,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:48" (2/3) ... [2021-11-20 06:27:54,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a21d596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:27:54, skipping insertion in model container [2021-11-20 06:27:54,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:27:54" (3/3) ... [2021-11-20 06:27:54,240 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label05.c [2021-11-20 06:27:54,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:27:54,247 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:27:54,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:27:54,341 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:27:54,342 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:27:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:27:54,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:54,407 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] [2021-11-20 06:27:54,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:54,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2021-11-20 06:27:54,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:54,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582828896] [2021-11-20 06:27:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:54,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:54,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:54,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582828896] [2021-11-20 06:27:54,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582828896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:54,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:54,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:27:54,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709424054] [2021-11-20 06:27:54,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:54,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:27:54,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:54,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:27:54,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:27:54,871 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:58,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:58,571 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-11-20 06:27:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:27:58,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-20 06:27:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:58,602 INFO L225 Difference]: With dead ends: 1642 [2021-11-20 06:27:58,602 INFO L226 Difference]: Without dead ends: 975 [2021-11-20 06:27:58,610 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 [2021-11-20 06:27:58,614 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 429 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:58,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:27:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-20 06:27:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-11-20 06:27:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-11-20 06:27:58,730 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 61 [2021-11-20 06:27:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:58,730 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-11-20 06:27:58,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-11-20 06:27:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 06:27:58,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:58,738 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:58,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:27:58,739 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:58,740 INFO L85 PathProgramCache]: Analyzing trace with hash -587835876, now seen corresponding path program 1 times [2021-11-20 06:27:58,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:58,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653517707] [2021-11-20 06:27:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:58,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:58,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653517707] [2021-11-20 06:27:58,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653517707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:58,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:58,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:27:58,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901726698] [2021-11-20 06:27:58,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:58,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:27:58,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:58,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:27:58,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:27:58,961 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:02,266 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-11-20 06:28:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:02,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-20 06:28:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:02,289 INFO L225 Difference]: With dead ends: 2814 [2021-11-20 06:28:02,289 INFO L226 Difference]: Without dead ends: 1844 [2021-11-20 06:28:02,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:02,293 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 430 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:02,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 06:28:02,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-20 06:28:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-11-20 06:28:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:02,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-11-20 06:28:02,357 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 131 [2021-11-20 06:28:02,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:02,359 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-11-20 06:28:02,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-11-20 06:28:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 06:28:02,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:02,367 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:02,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:28:02,368 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash 550611417, now seen corresponding path program 1 times [2021-11-20 06:28:02,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:02,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80073713] [2021-11-20 06:28:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:02,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:02,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:02,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80073713] [2021-11-20 06:28:02,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80073713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:02,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:02,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:28:02,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029127752] [2021-11-20 06:28:02,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:02,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:02,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:02,532 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:05,422 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2021-11-20 06:28:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-11-20 06:28:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:05,440 INFO L225 Difference]: With dead ends: 5395 [2021-11-20 06:28:05,440 INFO L226 Difference]: Without dead ends: 2701 [2021-11-20 06:28:05,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:05,451 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:05,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 06:28:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-11-20 06:28:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2021-11-20 06:28:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2021-11-20 06:28:05,526 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 153 [2021-11-20 06:28:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:05,527 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2021-11-20 06:28:05,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2021-11-20 06:28:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-20 06:28:05,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:05,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:05,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:28:05,537 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1656830554, now seen corresponding path program 1 times [2021-11-20 06:28:05,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:05,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226267276] [2021-11-20 06:28:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:05,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:05,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:05,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226267276] [2021-11-20 06:28:05,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226267276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:05,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:05,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:28:05,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805426628] [2021-11-20 06:28:05,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:05,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:05,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:05,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:05,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:05,795 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:07,965 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2021-11-20 06:28:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:07,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2021-11-20 06:28:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:07,994 INFO L225 Difference]: With dead ends: 7108 [2021-11-20 06:28:07,994 INFO L226 Difference]: Without dead ends: 4409 [2021-11-20 06:28:07,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:08,000 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:08,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:28:08,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-11-20 06:28:08,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2021-11-20 06:28:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2021-11-20 06:28:08,160 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 213 [2021-11-20 06:28:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:08,162 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2021-11-20 06:28:08,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2021-11-20 06:28:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-20 06:28:08,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:08,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:08,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:28:08,168 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash 242083083, now seen corresponding path program 1 times [2021-11-20 06:28:08,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:08,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911626714] [2021-11-20 06:28:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:08,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 06:28:08,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:08,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911626714] [2021-11-20 06:28:08,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911626714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:08,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:08,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:28:08,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190456578] [2021-11-20 06:28:08,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:08,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:08,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:08,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:08,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:08,363 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:10,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:10,708 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2021-11-20 06:28:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:10,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 215 [2021-11-20 06:28:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:10,747 INFO L225 Difference]: With dead ends: 10936 [2021-11-20 06:28:10,748 INFO L226 Difference]: Without dead ends: 6528 [2021-11-20 06:28:10,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:10,755 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 390 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:10,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:28:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-11-20 06:28:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2021-11-20 06:28:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2021-11-20 06:28:10,891 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 215 [2021-11-20 06:28:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:10,892 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2021-11-20 06:28:10,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2021-11-20 06:28:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-20 06:28:10,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:10,903 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:10,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:28:10,904 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:10,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1296606725, now seen corresponding path program 1 times [2021-11-20 06:28:10,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:10,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911369037] [2021-11-20 06:28:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:10,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:28:11,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:11,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911369037] [2021-11-20 06:28:11,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911369037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:11,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:11,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:28:11,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037595693] [2021-11-20 06:28:11,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:11,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:11,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:11,178 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:13,818 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2021-11-20 06:28:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:13,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 281 [2021-11-20 06:28:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:13,850 INFO L225 Difference]: With dead ends: 10045 [2021-11-20 06:28:13,850 INFO L226 Difference]: Without dead ends: 5665 [2021-11-20 06:28:13,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:13,858 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 375 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:13,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 06:28:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2021-11-20 06:28:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2021-11-20 06:28:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2021-11-20 06:28:13,983 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 281 [2021-11-20 06:28:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:13,984 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2021-11-20 06:28:13,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2021-11-20 06:28:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-20 06:28:13,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:13,990 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:13,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:28:13,991 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1091287017, now seen corresponding path program 1 times [2021-11-20 06:28:13,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:13,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828366732] [2021-11-20 06:28:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:13,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:28:14,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:14,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828366732] [2021-11-20 06:28:14,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828366732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:14,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:14,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:28:14,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144831014] [2021-11-20 06:28:14,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:14,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:14,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:14,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:14,181 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:16,780 INFO L93 Difference]: Finished difference Result 13049 states and 15222 transitions. [2021-11-20 06:28:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 293 [2021-11-20 06:28:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:16,817 INFO L225 Difference]: With dead ends: 13049 [2021-11-20 06:28:16,818 INFO L226 Difference]: Without dead ends: 7389 [2021-11-20 06:28:16,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:16,826 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 495 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:16,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 628 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:28:16,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2021-11-20 06:28:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 6959. [2021-11-20 06:28:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6959 states, 6958 states have (on average 1.1636964645012935) internal successors, (8097), 6958 states have internal predecessors, (8097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6959 states to 6959 states and 8097 transitions. [2021-11-20 06:28:17,002 INFO L78 Accepts]: Start accepts. Automaton has 6959 states and 8097 transitions. Word has length 293 [2021-11-20 06:28:17,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:17,002 INFO L470 AbstractCegarLoop]: Abstraction has 6959 states and 8097 transitions. [2021-11-20 06:28:17,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand 6959 states and 8097 transitions. [2021-11-20 06:28:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-20 06:28:17,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:17,010 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:17,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:28:17,010 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash -718044374, now seen corresponding path program 1 times [2021-11-20 06:28:17,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986364813] [2021-11-20 06:28:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:17,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:28:17,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:17,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986364813] [2021-11-20 06:28:17,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986364813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:17,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:17,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:28:17,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604601517] [2021-11-20 06:28:17,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:17,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:17,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:17,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:17,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:17,169 INFO L87 Difference]: Start difference. First operand 6959 states and 8097 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) [2021-11-20 06:28:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:19,160 INFO L93 Difference]: Finished difference Result 17316 states and 20393 transitions. [2021-11-20 06:28:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:19,161 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 298 [2021-11-20 06:28:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:19,186 INFO L225 Difference]: With dead ends: 17316 [2021-11-20 06:28:19,186 INFO L226 Difference]: Without dead ends: 10359 [2021-11-20 06:28:19,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:19,196 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:19,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 841 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:28:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2021-11-20 06:28:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 9509. [2021-11-20 06:28:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9509 states, 9508 states have (on average 1.141459823306689) internal successors, (10853), 9508 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9509 states to 9509 states and 10853 transitions. [2021-11-20 06:28:19,372 INFO L78 Accepts]: Start accepts. Automaton has 9509 states and 10853 transitions. Word has length 298 [2021-11-20 06:28:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:19,373 INFO L470 AbstractCegarLoop]: Abstraction has 9509 states and 10853 transitions. [2021-11-20 06:28:19,373 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) [2021-11-20 06:28:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9509 states and 10853 transitions. [2021-11-20 06:28:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-20 06:28:19,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:19,381 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:19,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:28:19,382 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:19,382 INFO L85 PathProgramCache]: Analyzing trace with hash 607069652, now seen corresponding path program 1 times [2021-11-20 06:28:19,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:19,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586186823] [2021-11-20 06:28:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:19,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:28:19,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:19,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586186823] [2021-11-20 06:28:19,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586186823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:19,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:19,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:28:19,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726271129] [2021-11-20 06:28:19,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:19,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:19,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:19,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:19,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:19,521 INFO L87 Difference]: Start difference. First operand 9509 states and 10853 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:21,660 INFO L93 Difference]: Finished difference Result 22432 states and 25678 transitions. [2021-11-20 06:28:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 316 [2021-11-20 06:28:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:21,687 INFO L225 Difference]: With dead ends: 22432 [2021-11-20 06:28:21,687 INFO L226 Difference]: Without dead ends: 12493 [2021-11-20 06:28:21,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:21,699 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 444 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:21,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 294 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:28:21,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12493 states. [2021-11-20 06:28:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12493 to 11637. [2021-11-20 06:28:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11637 states, 11636 states have (on average 1.1473014781711928) internal successors, (13350), 11636 states have internal predecessors, (13350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11637 states to 11637 states and 13350 transitions. [2021-11-20 06:28:21,909 INFO L78 Accepts]: Start accepts. Automaton has 11637 states and 13350 transitions. Word has length 316 [2021-11-20 06:28:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:21,910 INFO L470 AbstractCegarLoop]: Abstraction has 11637 states and 13350 transitions. [2021-11-20 06:28:21,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 11637 states and 13350 transitions. [2021-11-20 06:28:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-20 06:28:21,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:21,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:21,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:28:21,921 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:21,921 INFO L85 PathProgramCache]: Analyzing trace with hash 19861535, now seen corresponding path program 1 times [2021-11-20 06:28:21,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:21,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518531042] [2021-11-20 06:28:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:21,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:28:22,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:22,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518531042] [2021-11-20 06:28:22,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518531042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:22,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:22,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:28:22,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127497707] [2021-11-20 06:28:22,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:22,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:28:22,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:22,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:28:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:28:22,127 INFO L87 Difference]: Start difference. First operand 11637 states and 13350 transitions. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:26,600 INFO L93 Difference]: Finished difference Result 41234 states and 47495 transitions. [2021-11-20 06:28:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:28:26,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 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 321 [2021-11-20 06:28:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:26,666 INFO L225 Difference]: With dead ends: 41234 [2021-11-20 06:28:26,666 INFO L226 Difference]: Without dead ends: 28318 [2021-11-20 06:28:26,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:28:26,685 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 864 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2614 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:26,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 303 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2614 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-20 06:28:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28318 states. [2021-11-20 06:28:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28318 to 27841. [2021-11-20 06:28:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27841 states, 27840 states have (on average 1.135308908045977) internal successors, (31607), 27840 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:27,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27841 states to 27841 states and 31607 transitions. [2021-11-20 06:28:27,306 INFO L78 Accepts]: Start accepts. Automaton has 27841 states and 31607 transitions. Word has length 321 [2021-11-20 06:28:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:27,307 INFO L470 AbstractCegarLoop]: Abstraction has 27841 states and 31607 transitions. [2021-11-20 06:28:27,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 27841 states and 31607 transitions. [2021-11-20 06:28:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-20 06:28:27,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:27,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-11-20 06:28:27,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:28:27,319 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1005953088, now seen corresponding path program 1 times [2021-11-20 06:28:27,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:27,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511622431] [2021-11-20 06:28:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:27,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:28:27,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:27,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511622431] [2021-11-20 06:28:27,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511622431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:27,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:27,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:28:27,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558252478] [2021-11-20 06:28:27,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:27,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:27,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:27,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:27,660 INFO L87 Difference]: Start difference. First operand 27841 states and 31607 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:30,162 INFO L93 Difference]: Finished difference Result 68900 states and 78510 transitions. [2021-11-20 06:28:30,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:30,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 350 [2021-11-20 06:28:30,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:30,243 INFO L225 Difference]: With dead ends: 68900 [2021-11-20 06:28:30,243 INFO L226 Difference]: Without dead ends: 40632 [2021-11-20 06:28:30,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:30,267 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 423 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:30,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 426 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:28:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40632 states. [2021-11-20 06:28:30,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40632 to 38901. [2021-11-20 06:28:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38901 states, 38900 states have (on average 1.1130077120822621) internal successors, (43296), 38900 states have internal predecessors, (43296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38901 states to 38901 states and 43296 transitions. [2021-11-20 06:28:30,986 INFO L78 Accepts]: Start accepts. Automaton has 38901 states and 43296 transitions. Word has length 350 [2021-11-20 06:28:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:30,987 INFO L470 AbstractCegarLoop]: Abstraction has 38901 states and 43296 transitions. [2021-11-20 06:28:30,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 38901 states and 43296 transitions. [2021-11-20 06:28:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-11-20 06:28:31,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:31,001 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:31,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:28:31,001 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1377597151, now seen corresponding path program 1 times [2021-11-20 06:28:31,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:31,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032934447] [2021-11-20 06:28:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:31,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 340 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:31,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:31,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032934447] [2021-11-20 06:28:31,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032934447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:31,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257840211] [2021-11-20 06:28:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:31,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:31,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:31,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:31,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:28:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:31,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:28:31,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 304 proven. 82 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 06:28:33,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 304 proven. 82 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 06:28:35,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257840211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:35,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:28:35,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-11-20 06:28:35,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174103712] [2021-11-20 06:28:35,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:35,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:28:35,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:35,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:28:35,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:28:35,407 INFO L87 Difference]: Start difference. First operand 38901 states and 43296 transitions. Second operand has 9 states, 9 states have (on average 93.55555555555556) internal successors, (842), 9 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:51,282 INFO L93 Difference]: Finished difference Result 140039 states and 155486 transitions. [2021-11-20 06:28:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:28:51,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 93.55555555555556) internal successors, (842), 9 states have internal predecessors, (842), 0 states have call successors, (0), 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 356 [2021-11-20 06:28:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:51,411 INFO L225 Difference]: With dead ends: 140039 [2021-11-20 06:28:51,411 INFO L226 Difference]: Without dead ends: 96881 [2021-11-20 06:28:51,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:28:51,445 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 6871 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 11562 mSolverCounterSat, 2461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6871 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 14023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2461 IncrementalHoareTripleChecker+Valid, 11562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:51,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6871 Valid, 533 Invalid, 14023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2461 Valid, 11562 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2021-11-20 06:28:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96881 states. [2021-11-20 06:28:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96881 to 78910. [2021-11-20 06:28:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78910 states, 78909 states have (on average 1.1067432105336528) internal successors, (87332), 78909 states have internal predecessors, (87332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78910 states to 78910 states and 87332 transitions. [2021-11-20 06:28:53,339 INFO L78 Accepts]: Start accepts. Automaton has 78910 states and 87332 transitions. Word has length 356 [2021-11-20 06:28:53,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:53,339 INFO L470 AbstractCegarLoop]: Abstraction has 78910 states and 87332 transitions. [2021-11-20 06:28:53,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.55555555555556) internal successors, (842), 9 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 78910 states and 87332 transitions. [2021-11-20 06:28:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-11-20 06:28:53,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:53,360 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:53,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:53,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:28:53,579 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash 847934803, now seen corresponding path program 1 times [2021-11-20 06:28:53,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:53,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069061162] [2021-11-20 06:28:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:53,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:28:53,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:53,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069061162] [2021-11-20 06:28:53,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069061162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:53,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:53,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:28:53,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31827016] [2021-11-20 06:28:53,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:53,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:53,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:53,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:53,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:53,867 INFO L87 Difference]: Start difference. First operand 78910 states and 87332 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) [2021-11-20 06:28:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:56,433 INFO L93 Difference]: Finished difference Result 154409 states and 170894 transitions. [2021-11-20 06:28:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:56,434 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 430 [2021-11-20 06:28:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:56,521 INFO L225 Difference]: With dead ends: 154409 [2021-11-20 06:28:56,522 INFO L226 Difference]: Without dead ends: 75500 [2021-11-20 06:28:56,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:56,553 INFO L933 BasicCegarLoop]: 661 mSDtfsCounter, 440 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:56,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 724 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:28:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75500 states. [2021-11-20 06:28:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75500 to 74219. [2021-11-20 06:28:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74219 states, 74218 states have (on average 1.0800749144412407) internal successors, (80161), 74218 states have internal predecessors, (80161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74219 states to 74219 states and 80161 transitions. [2021-11-20 06:28:57,907 INFO L78 Accepts]: Start accepts. Automaton has 74219 states and 80161 transitions. Word has length 430 [2021-11-20 06:28:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:57,908 INFO L470 AbstractCegarLoop]: Abstraction has 74219 states and 80161 transitions. [2021-11-20 06:28:57,908 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) [2021-11-20 06:28:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 74219 states and 80161 transitions. [2021-11-20 06:28:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-11-20 06:28:57,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:57,924 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:57,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:28:57,924 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:57,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1512749513, now seen corresponding path program 1 times [2021-11-20 06:28:57,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933657299] [2021-11-20 06:28:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:57,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 610 proven. 80 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 06:28:58,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:58,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933657299] [2021-11-20 06:28:58,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933657299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:58,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147192014] [2021-11-20 06:28:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:58,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:58,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:58,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:28:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:58,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:28:58,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 690 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 06:28:59,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:28:59,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147192014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:59,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:28:59,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:28:59,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362100160] [2021-11-20 06:28:59,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:59,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:28:59,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:59,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:28:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:28:59,872 INFO L87 Difference]: Start difference. First operand 74219 states and 80161 transitions. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:02,781 INFO L93 Difference]: Finished difference Result 148861 states and 160746 transitions. [2021-11-20 06:29:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:29:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 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 438 [2021-11-20 06:29:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:02,856 INFO L225 Difference]: With dead ends: 148861 [2021-11-20 06:29:02,857 INFO L226 Difference]: Without dead ends: 74644 [2021-11-20 06:29:02,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:29:02,886 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 827 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:02,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 324 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:29:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74644 states. [2021-11-20 06:29:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74644 to 74219. [2021-11-20 06:29:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74219 states, 74218 states have (on average 1.0791047993748146) internal successors, (80089), 74218 states have internal predecessors, (80089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74219 states to 74219 states and 80089 transitions. [2021-11-20 06:29:04,025 INFO L78 Accepts]: Start accepts. Automaton has 74219 states and 80089 transitions. Word has length 438 [2021-11-20 06:29:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:04,026 INFO L470 AbstractCegarLoop]: Abstraction has 74219 states and 80089 transitions. [2021-11-20 06:29:04,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 74219 states and 80089 transitions. [2021-11-20 06:29:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-11-20 06:29:04,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:04,045 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-11-20 06:29:04,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:04,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:04,251 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1363812155, now seen corresponding path program 1 times [2021-11-20 06:29:04,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:04,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360306029] [2021-11-20 06:29:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:04,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 594 proven. 72 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 06:29:04,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:04,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360306029] [2021-11-20 06:29:04,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360306029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:04,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222181568] [2021-11-20 06:29:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:04,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:04,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:04,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:04,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:29:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:04,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:29:04,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 666 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 06:29:06,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:29:06,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222181568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:06,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:29:06,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:29:06,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711857147] [2021-11-20 06:29:06,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:06,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:29:06,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:29:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:29:06,269 INFO L87 Difference]: Start difference. First operand 74219 states and 80089 transitions. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:09,265 INFO L93 Difference]: Finished difference Result 151415 states and 163364 transitions. [2021-11-20 06:29:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:29:09,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 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 439 [2021-11-20 06:29:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:09,365 INFO L225 Difference]: With dead ends: 151415 [2021-11-20 06:29:09,365 INFO L226 Difference]: Without dead ends: 77198 [2021-11-20 06:29:09,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:29:09,394 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 860 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:09,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 327 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:29:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77198 states. [2021-11-20 06:29:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77198 to 76348. [2021-11-20 06:29:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76348 states, 76347 states have (on average 1.0784444706406278) internal successors, (82336), 76347 states have internal predecessors, (82336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76348 states to 76348 states and 82336 transitions. [2021-11-20 06:29:10,699 INFO L78 Accepts]: Start accepts. Automaton has 76348 states and 82336 transitions. Word has length 439 [2021-11-20 06:29:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:10,700 INFO L470 AbstractCegarLoop]: Abstraction has 76348 states and 82336 transitions. [2021-11-20 06:29:10,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 76348 states and 82336 transitions. [2021-11-20 06:29:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-11-20 06:29:10,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:10,714 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:10,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:10,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:10,939 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:10,940 INFO L85 PathProgramCache]: Analyzing trace with hash -897799758, now seen corresponding path program 1 times [2021-11-20 06:29:10,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:10,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196926548] [2021-11-20 06:29:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:10,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:29:11,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:11,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196926548] [2021-11-20 06:29:11,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196926548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:11,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:11,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:29:11,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507604086] [2021-11-20 06:29:11,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:11,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:29:11,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:29:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:29:11,195 INFO L87 Difference]: Start difference. First operand 76348 states and 82336 transitions. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:14,422 INFO L93 Difference]: Finished difference Result 163792 states and 176567 transitions. [2021-11-20 06:29:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:29:14,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 447 [2021-11-20 06:29:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:14,500 INFO L225 Difference]: With dead ends: 163792 [2021-11-20 06:29:14,500 INFO L226 Difference]: Without dead ends: 87021 [2021-11-20 06:29:14,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:29:14,519 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 402 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:14,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 825 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:29:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87021 states. [2021-11-20 06:29:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87021 to 77198. [2021-11-20 06:29:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77198 states, 77197 states have (on average 1.0758449162532222) internal successors, (83052), 77197 states have internal predecessors, (83052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77198 states to 77198 states and 83052 transitions. [2021-11-20 06:29:15,604 INFO L78 Accepts]: Start accepts. Automaton has 77198 states and 83052 transitions. Word has length 447 [2021-11-20 06:29:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:15,605 INFO L470 AbstractCegarLoop]: Abstraction has 77198 states and 83052 transitions. [2021-11-20 06:29:15,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 77198 states and 83052 transitions. [2021-11-20 06:29:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-11-20 06:29:15,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:15,622 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:15,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:29:15,623 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:15,624 INFO L85 PathProgramCache]: Analyzing trace with hash -783347701, now seen corresponding path program 1 times [2021-11-20 06:29:15,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:15,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453877573] [2021-11-20 06:29:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:15,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:29:15,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:15,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453877573] [2021-11-20 06:29:15,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453877573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:15,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:15,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:29:15,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126864888] [2021-11-20 06:29:15,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:15,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:29:15,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:15,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:29:15,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:29:15,901 INFO L87 Difference]: Start difference. First operand 77198 states and 83052 transitions. Second operand has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:20,298 INFO L93 Difference]: Finished difference Result 188469 states and 202529 transitions. [2021-11-20 06:29:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:29:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 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 548 [2021-11-20 06:29:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:20,441 INFO L225 Difference]: With dead ends: 188469 [2021-11-20 06:29:20,441 INFO L226 Difference]: Without dead ends: 110848 [2021-11-20 06:29:20,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:29:20,813 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 854 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:20,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 198 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 2347 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-20 06:29:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110848 states. [2021-11-20 06:29:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110848 to 101055. [2021-11-20 06:29:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101055 states, 101054 states have (on average 1.0712391394699863) internal successors, (108253), 101054 states have internal predecessors, (108253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101055 states to 101055 states and 108253 transitions. [2021-11-20 06:29:22,367 INFO L78 Accepts]: Start accepts. Automaton has 101055 states and 108253 transitions. Word has length 548 [2021-11-20 06:29:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:22,367 INFO L470 AbstractCegarLoop]: Abstraction has 101055 states and 108253 transitions. [2021-11-20 06:29:22,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 101055 states and 108253 transitions. [2021-11-20 06:29:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2021-11-20 06:29:22,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:22,385 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:22,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:29:22,386 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:22,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1921900243, now seen corresponding path program 1 times [2021-11-20 06:29:22,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:22,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127614332] [2021-11-20 06:29:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:22,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-20 06:29:22,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:22,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127614332] [2021-11-20 06:29:22,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127614332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:22,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:22,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:29:22,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464940343] [2021-11-20 06:29:22,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:22,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:29:22,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:22,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:29:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:29:22,621 INFO L87 Difference]: Start difference. First operand 101055 states and 108253 transitions. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:25,627 INFO L93 Difference]: Finished difference Result 214495 states and 229748 transitions. [2021-11-20 06:29:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:29:25,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 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 551 [2021-11-20 06:29:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:25,746 INFO L225 Difference]: With dead ends: 214495 [2021-11-20 06:29:25,746 INFO L226 Difference]: Without dead ends: 113014 [2021-11-20 06:29:25,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:29:25,788 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 428 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:25,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 278 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:29:25,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113014 states. [2021-11-20 06:29:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113014 to 103174. [2021-11-20 06:29:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103174 states, 103173 states have (on average 1.0703963246198134) internal successors, (110436), 103173 states have internal predecessors, (110436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103174 states to 103174 states and 110436 transitions. [2021-11-20 06:29:27,857 INFO L78 Accepts]: Start accepts. Automaton has 103174 states and 110436 transitions. Word has length 551 [2021-11-20 06:29:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:27,857 INFO L470 AbstractCegarLoop]: Abstraction has 103174 states and 110436 transitions. [2021-11-20 06:29:27,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 103174 states and 110436 transitions. [2021-11-20 06:29:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-11-20 06:29:27,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:27,883 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:29:27,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:29:27,884 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:27,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1732417151, now seen corresponding path program 1 times [2021-11-20 06:29:27,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:27,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881782432] [2021-11-20 06:29:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:27,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2021-11-20 06:29:28,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:28,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881782432] [2021-11-20 06:29:28,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881782432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:28,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:28,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:29:28,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689465007] [2021-11-20 06:29:28,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:28,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:29:28,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:29:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:29:28,178 INFO L87 Difference]: Start difference. First operand 103174 states and 110436 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:31,378 INFO L93 Difference]: Finished difference Result 220383 states and 236108 transitions. [2021-11-20 06:29:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:29:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 568 [2021-11-20 06:29:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:31,497 INFO L225 Difference]: With dead ends: 220383 [2021-11-20 06:29:31,498 INFO L226 Difference]: Without dead ends: 116784 [2021-11-20 06:29:31,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:29:31,531 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 416 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:31,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 324 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:29:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116784 states. [2021-11-20 06:29:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116784 to 97201. [2021-11-20 06:29:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97201 states, 97200 states have (on average 1.0673868312757202) internal successors, (103750), 97200 states have internal predecessors, (103750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97201 states to 97201 states and 103750 transitions. [2021-11-20 06:29:32,984 INFO L78 Accepts]: Start accepts. Automaton has 97201 states and 103750 transitions. Word has length 568 [2021-11-20 06:29:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:32,984 INFO L470 AbstractCegarLoop]: Abstraction has 97201 states and 103750 transitions. [2021-11-20 06:29:32,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 97201 states and 103750 transitions. [2021-11-20 06:29:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2021-11-20 06:29:33,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:33,000 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:33,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:29:33,001 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:33,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1130819178, now seen corresponding path program 1 times [2021-11-20 06:29:33,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:33,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920550020] [2021-11-20 06:29:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:33,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 542 proven. 72 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:29:33,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:33,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920550020] [2021-11-20 06:29:33,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920550020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:33,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641944492] [2021-11-20 06:29:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:33,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:33,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:33,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:33,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:29:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:29:33,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 391 proven. 59 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:29:35,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 450 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:29:36,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641944492] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:36,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:29:36,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2021-11-20 06:29:36,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796567226] [2021-11-20 06:29:36,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:36,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:29:36,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:36,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:29:36,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:29:36,382 INFO L87 Difference]: Start difference. First operand 97201 states and 103750 transitions. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:40,702 INFO L93 Difference]: Finished difference Result 210166 states and 224198 transitions. [2021-11-20 06:29:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:29:40,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 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 628 [2021-11-20 06:29:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:40,841 INFO L225 Difference]: With dead ends: 210166 [2021-11-20 06:29:40,841 INFO L226 Difference]: Without dead ends: 111689 [2021-11-20 06:29:40,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1259 GetRequests, 1252 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:29:40,884 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 933 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:40,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 192 Invalid, 2787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 06:29:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111689 states. [2021-11-20 06:29:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111689 to 107415. [2021-11-20 06:29:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107415 states, 107414 states have (on average 1.0682406390228463) internal successors, (114744), 107414 states have internal predecessors, (114744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107415 states to 107415 states and 114744 transitions. [2021-11-20 06:29:42,554 INFO L78 Accepts]: Start accepts. Automaton has 107415 states and 114744 transitions. Word has length 628 [2021-11-20 06:29:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:42,555 INFO L470 AbstractCegarLoop]: Abstraction has 107415 states and 114744 transitions. [2021-11-20 06:29:42,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 107415 states and 114744 transitions. [2021-11-20 06:29:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2021-11-20 06:29:42,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:42,578 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:42,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:42,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7b92d1-7c19-4ca8-934a-d6cb93cebd1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:42,782 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash -20231264, now seen corresponding path program 1 times [2021-11-20 06:29:42,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:42,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646402231] [2021-11-20 06:29:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:42,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:29:43,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646402231] [2021-11-20 06:29:43,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646402231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:43,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:43,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:29:43,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081812085] [2021-11-20 06:29:43,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:43,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:29:43,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:43,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:29:43,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:29:43,059 INFO L87 Difference]: Start difference. First operand 107415 states and 114744 transitions. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:46,581 INFO L93 Difference]: Finished difference Result 226342 states and 241915 transitions. [2021-11-20 06:29:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:29:46,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 655 [2021-11-20 06:29:46,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:46,715 INFO L225 Difference]: With dead ends: 226342 [2021-11-20 06:29:46,715 INFO L226 Difference]: Without dead ends: 118503 [2021-11-20 06:29:46,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:29:46,763 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 407 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:46,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 265 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 06:29:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118503 states. [2021-11-20 06:29:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118503 to 109975. [2021-11-20 06:29:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109975 states, 109974 states have (on average 1.068670776729045) internal successors, (117526), 109974 states have internal predecessors, (117526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109975 states to 109975 states and 117526 transitions. [2021-11-20 06:29:49,070 INFO L78 Accepts]: Start accepts. Automaton has 109975 states and 117526 transitions. Word has length 655 [2021-11-20 06:29:49,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:49,070 INFO L470 AbstractCegarLoop]: Abstraction has 109975 states and 117526 transitions. [2021-11-20 06:29:49,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 109975 states and 117526 transitions. [2021-11-20 06:29:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-11-20 06:29:49,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:49,106 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:49,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:29:49,107 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash 558961287, now seen corresponding path program 1 times [2021-11-20 06:29:49,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:49,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985184735] [2021-11-20 06:29:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:49,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 869 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-20 06:29:49,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:49,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985184735] [2021-11-20 06:29:49,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985184735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:49,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:49,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:29:49,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254285515] [2021-11-20 06:29:49,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:49,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:29:49,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:49,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:29:49,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:29:49,391 INFO L87 Difference]: Start difference. First operand 109975 states and 117526 transitions. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:53,075 INFO L93 Difference]: Finished difference Result 234433 states and 250461 transitions. [2021-11-20 06:29:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:29:53,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 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 667 [2021-11-20 06:29:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:53,219 INFO L225 Difference]: With dead ends: 234433 [2021-11-20 06:29:53,220 INFO L226 Difference]: Without dead ends: 124031 [2021-11-20 06:29:53,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:29:53,249 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 323 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:53,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 763 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:29:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124031 states.