./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label21.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_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/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_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label21.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/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_e9632d02-51be-41b7-9ac8-1d137cb58976/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 cf1785c72f46b71ff38ed18504aab74c5c60cda53bca8d196fb5a21f47b63a1c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:11:16,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:11:16,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:11:16,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:11:16,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:11:16,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:11:16,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:11:16,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:11:16,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:11:16,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:11:16,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:11:16,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:11:16,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:11:16,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:11:16,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:11:16,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:11:16,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:11:16,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:11:16,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:11:16,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:11:16,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:11:16,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:11:16,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:11:16,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:11:16,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:11:16,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:11:16,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:11:16,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:11:16,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:11:16,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:11:16,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:11:16,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:11:16,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:11:16,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:11:16,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:11:16,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:11:16,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:11:16,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:11:16,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:11:16,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:11:16,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:11:16,169 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:11:16,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:11:16,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:11:16,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:11:16,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:11:16,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:11:16,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:11:16,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:11:16,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:11:16,223 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:11:16,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:11:16,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:11:16,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:11:16,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:11:16,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:11:16,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:11:16,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:11:16,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:11:16,226 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:11:16,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:11:16,227 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:11:16,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:11:16,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:11:16,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:11:16,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:11:16,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:11:16,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:11:16,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:11:16,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:11:16,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:11:16,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:11:16,231 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:11:16,231 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:11:16,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:11:16,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:11:16,232 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_e9632d02-51be-41b7-9ac8-1d137cb58976/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf1785c72f46b71ff38ed18504aab74c5c60cda53bca8d196fb5a21f47b63a1c [2021-11-20 06:11:16,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:11:16,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:11:16,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:11:16,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:11:16,511 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:11:16,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem12_label21.c [2021-11-20 06:11:16,577 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/data/62d1d13f0/41fe5bf9afdc4174ac5be301d755727b/FLAGda3fd953c [2021-11-20 06:11:17,438 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:11:17,438 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/sv-benchmarks/c/eca-rers2012/Problem12_label21.c [2021-11-20 06:11:17,480 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/data/62d1d13f0/41fe5bf9afdc4174ac5be301d755727b/FLAGda3fd953c [2021-11-20 06:11:17,944 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/data/62d1d13f0/41fe5bf9afdc4174ac5be301d755727b [2021-11-20 06:11:17,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:11:17,949 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:11:17,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:11:17,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:11:17,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:11:17,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:11:17" (1/1) ... [2021-11-20 06:11:17,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@750d0cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:17, skipping insertion in model container [2021-11-20 06:11:17,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:11:17" (1/1) ... [2021-11-20 06:11:17,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:11:18,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:11:18,487 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_e9632d02-51be-41b7-9ac8-1d137cb58976/sv-benchmarks/c/eca-rers2012/Problem12_label21.c[3054,3067] [2021-11-20 06:11:19,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:11:19,655 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:11:19,681 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_e9632d02-51be-41b7-9ac8-1d137cb58976/sv-benchmarks/c/eca-rers2012/Problem12_label21.c[3054,3067] [2021-11-20 06:11:20,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:11:20,346 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:11:20,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20 WrapperNode [2021-11-20 06:11:20,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:11:20,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:11:20,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:11:20,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:11:20,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (1/1) ... [2021-11-20 06:11:20,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (1/1) ... [2021-11-20 06:11:20,788 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-11-20 06:11:20,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:11:20,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:11:20,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:11:20,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:11:20,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (1/1) ... [2021-11-20 06:11:20,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (1/1) ... [2021-11-20 06:11:20,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (1/1) ... [2021-11-20 06:11:20,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (1/1) ... [2021-11-20 06:11:21,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (1/1) ... [2021-11-20 06:11:21,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (1/1) ... [2021-11-20 06:11:21,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (1/1) ... [2021-11-20 06:11:21,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:11:21,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:11:21,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:11:21,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:11:21,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (1/1) ... [2021-11-20 06:11:21,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:11:21,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:21,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:11:21,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:11:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:11:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:11:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:11:21,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:11:21,684 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:11:21,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:11:26,298 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:11:26,319 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:11:26,320 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:11:26,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:11:26 BoogieIcfgContainer [2021-11-20 06:11:26,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:11:26,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:11:26,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:11:26,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:11:26,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:11:17" (1/3) ... [2021-11-20 06:11:26,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b97a1f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:11:26, skipping insertion in model container [2021-11-20 06:11:26,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:20" (2/3) ... [2021-11-20 06:11:26,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b97a1f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:11:26, skipping insertion in model container [2021-11-20 06:11:26,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:11:26" (3/3) ... [2021-11-20 06:11:26,334 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label21.c [2021-11-20 06:11:26,340 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:11:26,341 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:11:26,396 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:11:26,403 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 06:11:26,404 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:11:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 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 06:11:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:11:26,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:26,450 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] [2021-11-20 06:11:26,450 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:26,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2021-11-20 06:11:26,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:26,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970080637] [2021-11-20 06:11:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:26,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:26,680 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 06:11:26,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:26,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970080637] [2021-11-20 06:11:26,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970080637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:26,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:26,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:11:26,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738585635] [2021-11-20 06:11:26,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:26,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:11:26,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:11:26,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:11:26,744 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 06:11:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:31,386 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-20 06:11:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:11:31,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-11-20 06:11:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:31,420 INFO L225 Difference]: With dead ends: 2388 [2021-11-20 06:11:31,420 INFO L226 Difference]: Without dead ends: 1506 [2021-11-20 06:11:31,428 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 06:11:31,432 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 875 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:31,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 156 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 06:11:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-20 06:11:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-20 06:11:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.8458471760797341) internal successors, (2778), 1505 states have internal predecessors, (2778), 0 states have call successors, (0), 0 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 06:11:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2778 transitions. [2021-11-20 06:11:31,565 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2778 transitions. Word has length 22 [2021-11-20 06:11:31,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:31,565 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2778 transitions. [2021-11-20 06:11:31,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 06:11:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2778 transitions. [2021-11-20 06:11:31,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 06:11:31,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:31,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:31,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:11:31,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:31,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:31,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1357231810, now seen corresponding path program 1 times [2021-11-20 06:11:31,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:31,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140510467] [2021-11-20 06:11:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:31,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:31,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140510467] [2021-11-20 06:11:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140510467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:31,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:31,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:11:31,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954336235] [2021-11-20 06:11:31,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:31,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:11:31,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:11:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:11:31,847 INFO L87 Difference]: Start difference. First operand 1506 states and 2778 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 06:11:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:35,581 INFO L93 Difference]: Finished difference Result 3761 states and 6893 transitions. [2021-11-20 06:11:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:11:35,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-11-20 06:11:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:35,597 INFO L225 Difference]: With dead ends: 3761 [2021-11-20 06:11:35,597 INFO L226 Difference]: Without dead ends: 2257 [2021-11-20 06:11:35,605 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 06:11:35,607 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:35,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 448 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 06:11:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-11-20 06:11:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-11-20 06:11:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4419326241134751) internal successors, (3253), 2256 states have internal predecessors, (3253), 0 states have call successors, (0), 0 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 06:11:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3253 transitions. [2021-11-20 06:11:35,675 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3253 transitions. Word has length 91 [2021-11-20 06:11:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:35,677 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3253 transitions. [2021-11-20 06:11:35,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 06:11:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3253 transitions. [2021-11-20 06:11:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:11:35,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:35,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:35,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:11:35,688 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:35,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash -186015367, now seen corresponding path program 1 times [2021-11-20 06:11:35,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:35,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061132168] [2021-11-20 06:11:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:35,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:35,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061132168] [2021-11-20 06:11:35,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061132168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:35,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515045743] [2021-11-20 06:11:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:35,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:35,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:35,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:35,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:11:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:36,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:11:36,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:36,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:11:36,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515045743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:36,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:11:36,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-20 06:11:36,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943943621] [2021-11-20 06:11:36,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:36,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:11:36,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:36,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:11:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:11:36,260 INFO L87 Difference]: Start difference. First operand 2257 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 06:11:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:40,304 INFO L93 Difference]: Finished difference Result 6765 states and 9754 transitions. [2021-11-20 06:11:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:11:40,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-20 06:11:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:40,342 INFO L225 Difference]: With dead ends: 6765 [2021-11-20 06:11:40,342 INFO L226 Difference]: Without dead ends: 4510 [2021-11-20 06:11:40,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:11:40,348 INFO L933 BasicCegarLoop]: 1370 mSDtfsCounter, 734 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:40,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1378 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 06:11:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-11-20 06:11:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2021-11-20 06:11:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.3714792636948325) internal successors, (6184), 4509 states have internal predecessors, (6184), 0 states have call successors, (0), 0 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 06:11:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6184 transitions. [2021-11-20 06:11:40,457 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6184 transitions. Word has length 93 [2021-11-20 06:11:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:40,458 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 6184 transitions. [2021-11-20 06:11:40,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 06:11:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6184 transitions. [2021-11-20 06:11:40,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:11:40,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:40,461 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:11:40,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:11:40,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 06:11:40,687 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash 854360618, now seen corresponding path program 1 times [2021-11-20 06:11:40,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:40,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445267122] [2021-11-20 06:11:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:40,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:40,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:40,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445267122] [2021-11-20 06:11:40,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445267122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:40,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:40,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:11:40,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631333803] [2021-11-20 06:11:40,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:40,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:11:40,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:40,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:11:40,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:11:40,815 INFO L87 Difference]: Start difference. First operand 4510 states and 6184 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 06:11:45,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:45,971 INFO L93 Difference]: Finished difference Result 9769 states and 13273 transitions. [2021-11-20 06:11:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:11:45,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-20 06:11:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:46,002 INFO L225 Difference]: With dead ends: 9769 [2021-11-20 06:11:46,002 INFO L226 Difference]: Without dead ends: 5261 [2021-11-20 06:11:46,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:46,009 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 2182 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 5487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:46,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2182 Valid, 240 Invalid, 5487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 06:11:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-11-20 06:11:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-11-20 06:11:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.2979087452471483) internal successors, (6827), 5260 states have internal predecessors, (6827), 0 states have call successors, (0), 0 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 06:11:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6827 transitions. [2021-11-20 06:11:46,136 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6827 transitions. Word has length 99 [2021-11-20 06:11:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:46,137 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 6827 transitions. [2021-11-20 06:11:46,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 06:11:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6827 transitions. [2021-11-20 06:11:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-20 06:11:46,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:46,140 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:46,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:11:46,141 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:46,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1142983397, now seen corresponding path program 1 times [2021-11-20 06:11:46,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:46,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793248785] [2021-11-20 06:11:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:46,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:46,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:46,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793248785] [2021-11-20 06:11:46,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793248785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:46,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:46,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:11:46,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270558304] [2021-11-20 06:11:46,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:46,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:11:46,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:46,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:11:46,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:11:46,268 INFO L87 Difference]: Start difference. First operand 5261 states and 6827 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 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 06:11:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:50,352 INFO L93 Difference]: Finished difference Result 12810 states and 17221 transitions. [2021-11-20 06:11:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:11:50,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 170 [2021-11-20 06:11:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:50,393 INFO L225 Difference]: With dead ends: 12810 [2021-11-20 06:11:50,393 INFO L226 Difference]: Without dead ends: 8265 [2021-11-20 06:11:50,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:11:50,403 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 3772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:50,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 612 Invalid, 3772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 3049 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 06:11:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2021-11-20 06:11:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 7514. [2021-11-20 06:11:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 1.213097298016771) internal successors, (9114), 7513 states have internal predecessors, (9114), 0 states have call successors, (0), 0 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 06:11:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 9114 transitions. [2021-11-20 06:11:50,606 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 9114 transitions. Word has length 170 [2021-11-20 06:11:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:50,607 INFO L470 AbstractCegarLoop]: Abstraction has 7514 states and 9114 transitions. [2021-11-20 06:11:50,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 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 06:11:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 9114 transitions. [2021-11-20 06:11:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-20 06:11:50,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:50,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:11:50,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:11:50,615 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:50,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1109781792, now seen corresponding path program 1 times [2021-11-20 06:11:50,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:50,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341533841] [2021-11-20 06:11:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:50,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 06:11:50,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:50,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341533841] [2021-11-20 06:11:50,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341533841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:50,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:50,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:11:50,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898999044] [2021-11-20 06:11:50,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:50,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:11:50,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:50,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:11:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:11:50,795 INFO L87 Difference]: Start difference. First operand 7514 states and 9114 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 06:11:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:53,893 INFO L93 Difference]: Finished difference Result 18783 states and 23429 transitions. [2021-11-20 06:11:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:11:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 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 244 [2021-11-20 06:11:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:53,934 INFO L225 Difference]: With dead ends: 18783 [2021-11-20 06:11:53,934 INFO L226 Difference]: Without dead ends: 12022 [2021-11-20 06:11:53,942 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 06:11:53,943 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:53,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 312 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 06:11:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12022 states. [2021-11-20 06:11:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12022 to 11269. [2021-11-20 06:11:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 1.1975505857294995) internal successors, (13494), 11268 states have internal predecessors, (13494), 0 states have call successors, (0), 0 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 06:11:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13494 transitions. [2021-11-20 06:11:54,158 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13494 transitions. Word has length 244 [2021-11-20 06:11:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:54,159 INFO L470 AbstractCegarLoop]: Abstraction has 11269 states and 13494 transitions. [2021-11-20 06:11:54,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 06:11:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13494 transitions. [2021-11-20 06:11:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-20 06:11:54,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:54,166 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:11:54,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:11:54,166 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:54,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash -206962365, now seen corresponding path program 1 times [2021-11-20 06:11:54,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:54,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998041693] [2021-11-20 06:11:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:54,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 06:11:54,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:54,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998041693] [2021-11-20 06:11:54,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998041693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:54,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:54,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:11:54,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327087693] [2021-11-20 06:11:54,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:54,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:11:54,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:11:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:11:54,418 INFO L87 Difference]: Start difference. First operand 11269 states and 13494 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:57,645 INFO L93 Difference]: Finished difference Result 26291 states and 32289 transitions. [2021-11-20 06:11:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:11:57,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2021-11-20 06:11:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:57,674 INFO L225 Difference]: With dead ends: 26291 [2021-11-20 06:11:57,674 INFO L226 Difference]: Without dead ends: 15775 [2021-11-20 06:11:57,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:11:57,686 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 829 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1005 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1005 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:57,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 142 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1005 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:11:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15775 states. [2021-11-20 06:11:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15775 to 15775. [2021-11-20 06:11:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2147838214783822) internal successors, (19162), 15774 states have internal predecessors, (19162), 0 states have call successors, (0), 0 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 06:11:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19162 transitions. [2021-11-20 06:11:58,013 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19162 transitions. Word has length 311 [2021-11-20 06:11:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:58,013 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 19162 transitions. [2021-11-20 06:11:58,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19162 transitions. [2021-11-20 06:11:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-20 06:11:58,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:58,022 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:11:58,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:11:58,022 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:58,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1322309612, now seen corresponding path program 1 times [2021-11-20 06:11:58,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:58,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592966090] [2021-11-20 06:11:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:58,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 59 proven. 108 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-20 06:11:58,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:58,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592966090] [2021-11-20 06:11:58,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592966090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:58,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6912807] [2021-11-20 06:11:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:58,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:58,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:58,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:11:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:58,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:11:58,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 06:11:59,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:11:59,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6912807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:59,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:11:59,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:11:59,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889119397] [2021-11-20 06:11:59,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:59,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:11:59,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:11:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:59,095 INFO L87 Difference]: Start difference. First operand 15775 states and 19162 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 06:12:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:01,830 INFO L93 Difference]: Finished difference Result 34552 states and 42441 transitions. [2021-11-20 06:12:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:12:01,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 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 340 [2021-11-20 06:12:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:01,871 INFO L225 Difference]: With dead ends: 34552 [2021-11-20 06:12:01,871 INFO L226 Difference]: Without dead ends: 19530 [2021-11-20 06:12:01,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:01,886 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 763 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:01,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 238 Invalid, 2782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 06:12:01,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19530 states. [2021-11-20 06:12:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19530 to 19530. [2021-11-20 06:12:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19530 states, 19529 states have (on average 1.2128629218085925) internal successors, (23686), 19529 states have internal predecessors, (23686), 0 states have call successors, (0), 0 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 06:12:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19530 states to 19530 states and 23686 transitions. [2021-11-20 06:12:02,287 INFO L78 Accepts]: Start accepts. Automaton has 19530 states and 23686 transitions. Word has length 340 [2021-11-20 06:12:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:02,287 INFO L470 AbstractCegarLoop]: Abstraction has 19530 states and 23686 transitions. [2021-11-20 06:12:02,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 06:12:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 19530 states and 23686 transitions. [2021-11-20 06:12:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-11-20 06:12:02,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:02,300 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:12:02,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:02,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:02,527 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash 186452354, now seen corresponding path program 1 times [2021-11-20 06:12:02,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:02,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172631331] [2021-11-20 06:12:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:02,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:12:02,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:02,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172631331] [2021-11-20 06:12:02,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172631331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:02,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:02,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:12:02,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582596985] [2021-11-20 06:12:02,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:02,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:12:02,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:12:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:12:02,670 INFO L87 Difference]: Start difference. First operand 19530 states and 23686 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:05,904 INFO L93 Difference]: Finished difference Result 48070 states and 58712 transitions. [2021-11-20 06:12:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:12:05,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 349 [2021-11-20 06:12:05,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:05,953 INFO L225 Difference]: With dead ends: 48070 [2021-11-20 06:12:05,954 INFO L226 Difference]: Without dead ends: 29293 [2021-11-20 06:12:05,975 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 06:12:05,978 INFO L933 BasicCegarLoop]: 1239 mSDtfsCounter, 635 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:05,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1247 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 06:12:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29293 states. [2021-11-20 06:12:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29293 to 27791. [2021-11-20 06:12:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27791 states, 27790 states have (on average 1.2121266642677222) internal successors, (33685), 27790 states have internal predecessors, (33685), 0 states have call successors, (0), 0 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 06:12:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27791 states to 27791 states and 33685 transitions. [2021-11-20 06:12:06,548 INFO L78 Accepts]: Start accepts. Automaton has 27791 states and 33685 transitions. Word has length 349 [2021-11-20 06:12:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:06,549 INFO L470 AbstractCegarLoop]: Abstraction has 27791 states and 33685 transitions. [2021-11-20 06:12:06,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 27791 states and 33685 transitions. [2021-11-20 06:12:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-11-20 06:12:06,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:06,555 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:12:06,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:12:06,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1295515256, now seen corresponding path program 1 times [2021-11-20 06:12:06,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:06,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635489001] [2021-11-20 06:12:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:06,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 06:12:06,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635489001] [2021-11-20 06:12:06,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635489001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:06,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:06,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:12:06,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489524931] [2021-11-20 06:12:06,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:06,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:12:06,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:06,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:12:06,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:12:06,960 INFO L87 Difference]: Start difference. First operand 27791 states and 33685 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 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 06:12:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:10,135 INFO L93 Difference]: Finished difference Result 63841 states and 78433 transitions. [2021-11-20 06:12:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:12:10,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 353 [2021-11-20 06:12:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:10,181 INFO L225 Difference]: With dead ends: 63841 [2021-11-20 06:12:10,182 INFO L226 Difference]: Without dead ends: 36803 [2021-11-20 06:12:10,197 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 06:12:10,198 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 853 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:10,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1117 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 2347 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 06:12:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36803 states. [2021-11-20 06:12:10,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36803 to 36803. [2021-11-20 06:12:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36803 states, 36802 states have (on average 1.2022444432367807) internal successors, (44245), 36802 states have internal predecessors, (44245), 0 states have call successors, (0), 0 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 06:12:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36803 states to 36803 states and 44245 transitions. [2021-11-20 06:12:10,750 INFO L78 Accepts]: Start accepts. Automaton has 36803 states and 44245 transitions. Word has length 353 [2021-11-20 06:12:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:10,750 INFO L470 AbstractCegarLoop]: Abstraction has 36803 states and 44245 transitions. [2021-11-20 06:12:10,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 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 06:12:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 36803 states and 44245 transitions. [2021-11-20 06:12:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-11-20 06:12:10,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:10,758 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:12:10,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:12:10,758 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash 192332022, now seen corresponding path program 1 times [2021-11-20 06:12:10,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:10,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553297784] [2021-11-20 06:12:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:10,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 06:12:10,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553297784] [2021-11-20 06:12:10,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553297784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:10,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:10,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:12:10,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231488271] [2021-11-20 06:12:10,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:10,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:12:10,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:10,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:12:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:12:10,941 INFO L87 Difference]: Start difference. First operand 36803 states and 44245 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:14,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:14,551 INFO L93 Difference]: Finished difference Result 102893 states and 124480 transitions. [2021-11-20 06:12:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:12:14,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-11-20 06:12:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:14,624 INFO L225 Difference]: With dead ends: 102893 [2021-11-20 06:12:14,624 INFO L226 Difference]: Without dead ends: 66843 [2021-11-20 06:12:14,647 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 06:12:14,648 INFO L933 BasicCegarLoop]: 1294 mSDtfsCounter, 682 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:14,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1302 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 06:12:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66843 states. [2021-11-20 06:12:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66843 to 64590. [2021-11-20 06:12:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64590 states, 64589 states have (on average 1.1479354069578411) internal successors, (74144), 64589 states have internal predecessors, (74144), 0 states have call successors, (0), 0 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 06:12:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64590 states to 64590 states and 74144 transitions. [2021-11-20 06:12:15,815 INFO L78 Accepts]: Start accepts. Automaton has 64590 states and 74144 transitions. Word has length 408 [2021-11-20 06:12:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:15,817 INFO L470 AbstractCegarLoop]: Abstraction has 64590 states and 74144 transitions. [2021-11-20 06:12:15,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 64590 states and 74144 transitions. [2021-11-20 06:12:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-11-20 06:12:15,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:15,831 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 06:12:15,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:12:15,832 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash 690551164, now seen corresponding path program 1 times [2021-11-20 06:12:15,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:15,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883822329] [2021-11-20 06:12:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:15,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 06:12:16,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:16,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883822329] [2021-11-20 06:12:16,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883822329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:16,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:16,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:12:16,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742080484] [2021-11-20 06:12:16,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:16,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:12:16,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:16,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:12:16,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:12:16,229 INFO L87 Difference]: Start difference. First operand 64590 states and 74144 transitions. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 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 06:12:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:19,535 INFO L93 Difference]: Finished difference Result 129929 states and 149046 transitions. [2021-11-20 06:12:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:12:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 453 [2021-11-20 06:12:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:19,623 INFO L225 Difference]: With dead ends: 129929 [2021-11-20 06:12:19,623 INFO L226 Difference]: Without dead ends: 66092 [2021-11-20 06:12:19,648 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 06:12:19,649 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 724 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:19,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 145 Invalid, 2967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:12:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66092 states. [2021-11-20 06:12:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66092 to 64590. [2021-11-20 06:12:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64590 states, 64589 states have (on average 1.141664989394479) internal successors, (73739), 64589 states have internal predecessors, (73739), 0 states have call successors, (0), 0 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 06:12:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64590 states to 64590 states and 73739 transitions. [2021-11-20 06:12:20,774 INFO L78 Accepts]: Start accepts. Automaton has 64590 states and 73739 transitions. Word has length 453 [2021-11-20 06:12:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:20,775 INFO L470 AbstractCegarLoop]: Abstraction has 64590 states and 73739 transitions. [2021-11-20 06:12:20,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 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 06:12:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 64590 states and 73739 transitions. [2021-11-20 06:12:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-11-20 06:12:20,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:20,787 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2021-11-20 06:12:20,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:12:20,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash -269594508, now seen corresponding path program 1 times [2021-11-20 06:12:20,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:20,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089836337] [2021-11-20 06:12:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:20,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-20 06:12:21,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:21,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089836337] [2021-11-20 06:12:21,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089836337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:21,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:21,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:12:21,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972970876] [2021-11-20 06:12:21,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:21,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:12:21,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:21,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:12:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:12:21,009 INFO L87 Difference]: Start difference. First operand 64590 states and 73739 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 06:12:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:24,728 INFO L93 Difference]: Finished difference Result 159218 states and 183921 transitions. [2021-11-20 06:12:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:12:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 457 [2021-11-20 06:12:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:24,844 INFO L225 Difference]: With dead ends: 159218 [2021-11-20 06:12:24,844 INFO L226 Difference]: Without dead ends: 95381 [2021-11-20 06:12:24,880 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 06:12:24,881 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 772 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:24,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 518 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:12:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95381 states. [2021-11-20 06:12:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95381 to 91626. [2021-11-20 06:12:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91626 states, 91625 states have (on average 1.1285238744884039) internal successors, (103401), 91625 states have internal predecessors, (103401), 0 states have call successors, (0), 0 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 06:12:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91626 states to 91626 states and 103401 transitions. [2021-11-20 06:12:26,180 INFO L78 Accepts]: Start accepts. Automaton has 91626 states and 103401 transitions. Word has length 457 [2021-11-20 06:12:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:26,181 INFO L470 AbstractCegarLoop]: Abstraction has 91626 states and 103401 transitions. [2021-11-20 06:12:26,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 06:12:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 91626 states and 103401 transitions. [2021-11-20 06:12:26,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-11-20 06:12:26,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:26,200 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:26,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:12:26,201 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1979372534, now seen corresponding path program 1 times [2021-11-20 06:12:26,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:26,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23009870] [2021-11-20 06:12:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:26,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 06:12:26,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:26,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23009870] [2021-11-20 06:12:26,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23009870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:26,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:26,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:12:26,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278371136] [2021-11-20 06:12:26,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:26,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:12:26,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:12:26,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:12:26,429 INFO L87 Difference]: Start difference. First operand 91626 states and 103401 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:30,691 INFO L93 Difference]: Finished difference Result 253093 states and 286565 transitions. [2021-11-20 06:12:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:12:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 496 [2021-11-20 06:12:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:30,902 INFO L225 Difference]: With dead ends: 253093 [2021-11-20 06:12:30,902 INFO L226 Difference]: Without dead ends: 162220 [2021-11-20 06:12:30,949 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 06:12:30,950 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 764 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:30,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 517 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:12:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162220 states. [2021-11-20 06:12:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162220 to 157714. [2021-11-20 06:12:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157714 states, 157713 states have (on average 1.1117092440065182) internal successors, (175331), 157713 states have internal predecessors, (175331), 0 states have call successors, (0), 0 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 06:12:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157714 states to 157714 states and 175331 transitions. [2021-11-20 06:12:33,623 INFO L78 Accepts]: Start accepts. Automaton has 157714 states and 175331 transitions. Word has length 496 [2021-11-20 06:12:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:33,624 INFO L470 AbstractCegarLoop]: Abstraction has 157714 states and 175331 transitions. [2021-11-20 06:12:33,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 157714 states and 175331 transitions. [2021-11-20 06:12:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2021-11-20 06:12:33,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:33,727 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:12:33,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:12:33,728 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:33,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1875944027, now seen corresponding path program 1 times [2021-11-20 06:12:33,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:33,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106296985] [2021-11-20 06:12:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:33,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 225 proven. 777 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-20 06:12:34,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106296985] [2021-11-20 06:12:34,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106296985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:12:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677573562] [2021-11-20 06:12:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:34,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:34,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:34,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:34,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:12:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:34,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:12:34,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-20 06:12:35,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:35,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677573562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:35,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:12:35,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-20 06:12:35,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560019472] [2021-11-20 06:12:35,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:35,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:12:35,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:35,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:12:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:12:35,766 INFO L87 Difference]: Start difference. First operand 157714 states and 175331 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 06:12:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:40,509 INFO L93 Difference]: Finished difference Result 331948 states and 369098 transitions. [2021-11-20 06:12:40,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:12:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 647 [2021-11-20 06:12:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:40,777 INFO L225 Difference]: With dead ends: 331948 [2021-11-20 06:12:40,777 INFO L226 Difference]: Without dead ends: 174987 [2021-11-20 06:12:41,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 647 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:12:41,210 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 852 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:41,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 1117 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:12:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174987 states. [2021-11-20 06:12:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174987 to 139690. [2021-11-20 06:12:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139690 states, 139689 states have (on average 1.110774649399738) internal successors, (155163), 139689 states have internal predecessors, (155163), 0 states have call successors, (0), 0 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 06:12:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139690 states to 139690 states and 155163 transitions. [2021-11-20 06:12:43,779 INFO L78 Accepts]: Start accepts. Automaton has 139690 states and 155163 transitions. Word has length 647 [2021-11-20 06:12:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:43,780 INFO L470 AbstractCegarLoop]: Abstraction has 139690 states and 155163 transitions. [2021-11-20 06:12:43,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 06:12:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand 139690 states and 155163 transitions. [2021-11-20 06:12:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-20 06:12:43,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:43,850 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:12:43,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:44,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9632d02-51be-41b7-9ac8-1d137cb58976/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:12:44,079 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:44,080 INFO L85 PathProgramCache]: Analyzing trace with hash 180293881, now seen corresponding path program 1 times [2021-11-20 06:12:44,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:44,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449475] [2021-11-20 06:12:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:44,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 06:12:44,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:44,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449475] [2021-11-20 06:12:44,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:44,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:44,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:12:44,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583333687] [2021-11-20 06:12:44,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:44,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:12:44,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:44,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:12:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:12:44,443 INFO L87 Difference]: Start difference. First operand 139690 states and 155163 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 06:12:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:49,213 INFO L93 Difference]: Finished difference Result 282382 states and 313409 transitions. [2021-11-20 06:12:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:12:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 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 703 [2021-11-20 06:12:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:49,404 INFO L225 Difference]: With dead ends: 282382 [2021-11-20 06:12:49,404 INFO L226 Difference]: Without dead ends: 139690 [2021-11-20 06:12:49,458 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 06:12:49,459 INFO L933 BasicCegarLoop]: 1228 mSDtfsCounter, 468 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:49,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 1235 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:12:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139690 states. [2021-11-20 06:12:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139690 to 136686. [2021-11-20 06:12:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136686 states, 136685 states have (on average 1.0730365438782603) internal successors, (146668), 136685 states have internal predecessors, (146668), 0 states have call successors, (0), 0 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 06:12:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136686 states to 136686 states and 146668 transitions. [2021-11-20 06:12:51,833 INFO L78 Accepts]: Start accepts. Automaton has 136686 states and 146668 transitions. Word has length 703 [2021-11-20 06:12:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:51,833 INFO L470 AbstractCegarLoop]: Abstraction has 136686 states and 146668 transitions. [2021-11-20 06:12:51,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 06:12:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 136686 states and 146668 transitions. [2021-11-20 06:12:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2021-11-20 06:12:51,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:51,857 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:12:51,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:12:51,857 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash -738751208, now seen corresponding path program 1 times [2021-11-20 06:12:51,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:51,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535088791] [2021-11-20 06:12:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:51,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 613 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 06:12:52,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:52,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535088791] [2021-11-20 06:12:52,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535088791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:52,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:52,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:12:52,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142657610] [2021-11-20 06:12:52,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:52,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:12:52,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:52,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:12:52,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:12:52,106 INFO L87 Difference]: Start difference. First operand 136686 states and 146668 transitions. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 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 06:12:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:56,215 INFO L93 Difference]: Finished difference Result 272619 states and 292578 transitions. [2021-11-20 06:12:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:12:56,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 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 732 [2021-11-20 06:12:56,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:56,385 INFO L225 Difference]: With dead ends: 272619 [2021-11-20 06:12:56,385 INFO L226 Difference]: Without dead ends: 136686 [2021-11-20 06:12:56,437 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 06:12:56,438 INFO L933 BasicCegarLoop]: 1263 mSDtfsCounter, 669 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:56,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1271 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2229 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 06:12:56,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136686 states. [2021-11-20 06:12:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136686 to 134433. [2021-11-20 06:12:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134433 states, 134432 states have (on average 1.0553885979528683) internal successors, (141878), 134432 states have internal predecessors, (141878), 0 states have call successors, (0), 0 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 06:12:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134433 states to 134433 states and 141878 transitions. [2021-11-20 06:12:58,999 INFO L78 Accepts]: Start accepts. Automaton has 134433 states and 141878 transitions. Word has length 732 [2021-11-20 06:12:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:59,000 INFO L470 AbstractCegarLoop]: Abstraction has 134433 states and 141878 transitions. [2021-11-20 06:12:59,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 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 06:12:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 134433 states and 141878 transitions. [2021-11-20 06:12:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2021-11-20 06:12:59,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:59,040 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:12:59,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:12:59,040 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1134992907, now seen corresponding path program 1 times [2021-11-20 06:12:59,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:59,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268186947] [2021-11-20 06:12:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:59,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 870 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:12:59,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:59,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268186947] [2021-11-20 06:12:59,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268186947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:59,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:59,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:59,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374652184] [2021-11-20 06:12:59,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:59,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:12:59,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:59,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:12:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:12:59,519 INFO L87 Difference]: Start difference. First operand 134433 states and 141878 transitions. Second operand has 6 states, 6 states have (on average 131.33333333333334) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 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 06:13:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:13:08,717 INFO L93 Difference]: Finished difference Result 284206 states and 300009 transitions. [2021-11-20 06:13:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:13:08,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 131.33333333333334) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 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 807 [2021-11-20 06:13:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:13:09,413 INFO L225 Difference]: With dead ends: 284206 [2021-11-20 06:13:09,413 INFO L226 Difference]: Without dead ends: 150526 [2021-11-20 06:13:09,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:13:09,481 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 2513 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 7601 mSolverCounterSat, 817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2513 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 8418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 817 IncrementalHoareTripleChecker+Valid, 7601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:13:09,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2513 Valid, 535 Invalid, 8418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [817 Valid, 7601 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-11-20 06:13:09,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150526 states. [2021-11-20 06:13:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150526 to 140441. [2021-11-20 06:13:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140441 states, 140440 states have (on average 1.0560524067217316) internal successors, (148312), 140440 states have internal predecessors, (148312), 0 states have call successors, (0), 0 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 06:13:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140441 states to 140441 states and 148312 transitions. [2021-11-20 06:13:11,666 INFO L78 Accepts]: Start accepts. Automaton has 140441 states and 148312 transitions. Word has length 807 [2021-11-20 06:13:11,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:13:11,667 INFO L470 AbstractCegarLoop]: Abstraction has 140441 states and 148312 transitions. [2021-11-20 06:13:11,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.33333333333334) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 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 06:13:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 140441 states and 148312 transitions. [2021-11-20 06:13:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2021-11-20 06:13:11,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:13:11,712 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:13:11,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:13:11,713 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:13:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:13:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1839008441, now seen corresponding path program 1 times [2021-11-20 06:13:11,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:13:11,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526907337] [2021-11-20 06:13:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:13:11,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:13:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:13:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 800 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-20 06:13:12,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:13:12,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526907337] [2021-11-20 06:13:12,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526907337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:13:12,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:13:12,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:13:12,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796299155] [2021-11-20 06:13:12,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:13:12,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:13:12,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:13:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:13:12,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:13:12,174 INFO L87 Difference]: Start difference. First operand 140441 states and 148312 transitions. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)