./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label17.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label17.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY --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 e8f177d03f4f60423a896dbe491efae793eb2062a8d25f45f05aed5ed36051f8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:12:02,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:12:02,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:12:02,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:12:02,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:12:02,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:12:02,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:12:02,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:12:02,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:12:02,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:12:02,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:12:02,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:12:02,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:12:02,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:12:02,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:12:02,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:12:02,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:12:02,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:12:02,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:12:02,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:12:02,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:12:02,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:12:02,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:12:02,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:12:02,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:12:02,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:12:02,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:12:02,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:12:02,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:12:02,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:12:02,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:12:02,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:12:02,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:12:02,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:12:02,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:12:02,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:12:02,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:12:02,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:12:02,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:12:02,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:12:02,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:12:02,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:12:02,264 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:12:02,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:12:02,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:12:02,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:12:02,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:12:02,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:12:02,277 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:12:02,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:12:02,278 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:12:02,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:12:02,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:12:02,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:12:02,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:12:02,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:12:02,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:12:02,285 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:12:02,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:12:02,286 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:12:02,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:12:02,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:12:02,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:12:02,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:12:02,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:12:02,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:12:02,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:12:02,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:12:02,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:12:02,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:12:02,289 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:12:02,291 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:12:02,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:12:02,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:12:02,293 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_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8f177d03f4f60423a896dbe491efae793eb2062a8d25f45f05aed5ed36051f8 [2021-11-07 08:12:02,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:12:02,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:12:02,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:12:02,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:12:02,703 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:12:02,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/eca-rers2012/Problem13_label17.c [2021-11-07 08:12:02,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/data/b0476b9f1/c8afd1ea1f52411c862cb6a23455b159/FLAG9c4ac3957 [2021-11-07 08:12:03,956 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:12:03,957 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/sv-benchmarks/c/eca-rers2012/Problem13_label17.c [2021-11-07 08:12:04,017 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/data/b0476b9f1/c8afd1ea1f52411c862cb6a23455b159/FLAG9c4ac3957 [2021-11-07 08:12:04,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/data/b0476b9f1/c8afd1ea1f52411c862cb6a23455b159 [2021-11-07 08:12:04,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:12:04,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:12:04,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:12:04,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:12:04,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:12:04,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:12:04" (1/1) ... [2021-11-07 08:12:04,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a150d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:04, skipping insertion in model container [2021-11-07 08:12:04,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:12:04" (1/1) ... [2021-11-07 08:12:04,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:12:04,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:12:05,024 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/sv-benchmarks/c/eca-rers2012/Problem13_label17.c[4917,4930] [2021-11-07 08:12:06,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:12:06,494 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:12:06,546 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/sv-benchmarks/c/eca-rers2012/Problem13_label17.c[4917,4930] [2021-11-07 08:12:07,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:12:07,771 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:12:07,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07 WrapperNode [2021-11-07 08:12:07,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:12:07,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:12:07,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:12:07,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:12:07,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (1/1) ... [2021-11-07 08:12:07,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (1/1) ... [2021-11-07 08:12:08,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:12:08,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:12:08,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:12:08,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:12:08,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (1/1) ... [2021-11-07 08:12:08,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (1/1) ... [2021-11-07 08:12:09,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (1/1) ... [2021-11-07 08:12:09,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (1/1) ... [2021-11-07 08:12:09,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (1/1) ... [2021-11-07 08:12:09,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (1/1) ... [2021-11-07 08:12:09,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (1/1) ... [2021-11-07 08:12:09,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:12:09,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:12:09,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:12:09,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:12:09,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (1/1) ... [2021-11-07 08:12:09,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:12:09,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:09,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:12:09,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:12:09,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:12:09,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:12:09,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:12:09,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:12:17,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:12:17,921 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 08:12:17,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:12:17 BoogieIcfgContainer [2021-11-07 08:12:17,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:12:17,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:12:17,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:12:17,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:12:17,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:12:04" (1/3) ... [2021-11-07 08:12:17,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d395839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:12:17, skipping insertion in model container [2021-11-07 08:12:17,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:07" (2/3) ... [2021-11-07 08:12:17,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d395839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:12:17, skipping insertion in model container [2021-11-07 08:12:17,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:12:17" (3/3) ... [2021-11-07 08:12:17,938 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label17.c [2021-11-07 08:12:17,945 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:12:17,946 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:12:18,018 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:12:18,027 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 [2021-11-07 08:12:18,027 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:12:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 08:12:18,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:18,088 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:18,089 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:18,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2113343065, now seen corresponding path program 1 times [2021-11-07 08:12:18,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:18,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226034041] [2021-11-07 08:12:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:18,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:18,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:18,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226034041] [2021-11-07 08:12:18,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226034041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:12:18,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:12:18,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:12:18,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909708450] [2021-11-07 08:12:18,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:12:18,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:18,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:12:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:12:18,468 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:25,006 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-11-07 08:12:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:12:25,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-07 08:12:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:25,065 INFO L225 Difference]: With dead ends: 3035 [2021-11-07 08:12:25,065 INFO L226 Difference]: Without dead ends: 1873 [2021-11-07 08:12:25,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:12:25,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-11-07 08:12:25,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-11-07 08:12:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-11-07 08:12:25,293 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 33 [2021-11-07 08:12:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:25,294 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-11-07 08:12:25,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-11-07 08:12:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 08:12:25,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:25,303 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:12:25,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:12:25,304 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1756463341, now seen corresponding path program 1 times [2021-11-07 08:12:25,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:25,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905918913] [2021-11-07 08:12:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:25,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:25,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:25,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905918913] [2021-11-07 08:12:25,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905918913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:12:25,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:12:25,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:12:25,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734356799] [2021-11-07 08:12:25,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:12:25,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:25,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:12:25,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:12:25,636 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:32,102 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2021-11-07 08:12:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:12:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-11-07 08:12:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:32,135 INFO L225 Difference]: With dead ends: 5317 [2021-11-07 08:12:32,136 INFO L226 Difference]: Without dead ends: 3460 [2021-11-07 08:12:32,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:12:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-11-07 08:12:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2021-11-07 08:12:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2021-11-07 08:12:32,262 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 105 [2021-11-07 08:12:32,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:32,263 INFO L470 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2021-11-07 08:12:32,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2021-11-07 08:12:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 08:12:32,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:32,276 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:32,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:12:32,278 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash -506428778, now seen corresponding path program 1 times [2021-11-07 08:12:32,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:32,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971746456] [2021-11-07 08:12:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:32,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:32,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:32,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971746456] [2021-11-07 08:12:32,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971746456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:12:32,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:12:32,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:12:32,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404664982] [2021-11-07 08:12:32,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:12:32,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:32,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:12:32,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:12:32,597 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:39,851 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2021-11-07 08:12:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:12:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-07 08:12:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:39,911 INFO L225 Difference]: With dead ends: 10870 [2021-11-07 08:12:39,911 INFO L226 Difference]: Without dead ends: 7413 [2021-11-07 08:12:39,919 INFO L786 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 [2021-11-07 08:12:39,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2021-11-07 08:12:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2021-11-07 08:12:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2021-11-07 08:12:40,226 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 119 [2021-11-07 08:12:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:40,227 INFO L470 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2021-11-07 08:12:40,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2021-11-07 08:12:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-07 08:12:40,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:40,230 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:40,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:12:40,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:40,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:40,232 INFO L85 PathProgramCache]: Analyzing trace with hash 853748547, now seen corresponding path program 1 times [2021-11-07 08:12:40,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:40,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080182336] [2021-11-07 08:12:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:40,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 08:12:40,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:40,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080182336] [2021-11-07 08:12:40,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080182336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:12:40,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:12:40,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:12:40,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999926834] [2021-11-07 08:12:40,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:12:40,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:40,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:12:40,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:12:40,393 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:45,824 INFO L93 Difference]: Finished difference Result 20355 states and 26251 transitions. [2021-11-07 08:12:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:12:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-07 08:12:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:45,935 INFO L225 Difference]: With dead ends: 20355 [2021-11-07 08:12:45,935 INFO L226 Difference]: Without dead ends: 13732 [2021-11-07 08:12:45,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:12:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2021-11-07 08:12:46,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 12937. [2021-11-07 08:12:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2021-11-07 08:12:46,363 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 200 [2021-11-07 08:12:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:46,365 INFO L470 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2021-11-07 08:12:46,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2021-11-07 08:12:46,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-07 08:12:46,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:46,376 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:46,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:12:46,376 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:46,378 INFO L85 PathProgramCache]: Analyzing trace with hash -269504365, now seen corresponding path program 1 times [2021-11-07 08:12:46,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:46,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464754622] [2021-11-07 08:12:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:46,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:46,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:46,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464754622] [2021-11-07 08:12:46,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464754622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:12:46,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:12:46,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:12:46,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597852964] [2021-11-07 08:12:46,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:12:46,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:46,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:12:46,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:12:46,630 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:51,610 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2021-11-07 08:12:51,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:12:51,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-11-07 08:12:51,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:51,675 INFO L225 Difference]: With dead ends: 31392 [2021-11-07 08:12:51,676 INFO L226 Difference]: Without dead ends: 19244 [2021-11-07 08:12:51,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:12:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2021-11-07 08:12:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 18447. [2021-11-07 08:12:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18447 states, 18446 states have (on average 1.2024287108316165) internal successors, (22180), 18446 states have internal predecessors, (22180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18447 states to 18447 states and 22180 transitions. [2021-11-07 08:12:52,198 INFO L78 Accepts]: Start accepts. Automaton has 18447 states and 22180 transitions. Word has length 232 [2021-11-07 08:12:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:52,199 INFO L470 AbstractCegarLoop]: Abstraction has 18447 states and 22180 transitions. [2021-11-07 08:12:52,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 18447 states and 22180 transitions. [2021-11-07 08:12:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-07 08:12:52,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:52,213 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:52,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:12:52,214 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1622019590, now seen corresponding path program 1 times [2021-11-07 08:12:52,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:52,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53694850] [2021-11-07 08:12:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:52,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-07 08:12:52,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:52,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53694850] [2021-11-07 08:12:52,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53694850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:12:52,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:12:52,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:12:52,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798307248] [2021-11-07 08:12:52,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:12:52,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:12:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:12:52,637 INFO L87 Difference]: Start difference. First operand 18447 states and 22180 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:00,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:00,432 INFO L93 Difference]: Finished difference Result 59761 states and 73268 transitions. [2021-11-07 08:13:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:13:00,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-11-07 08:13:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:00,546 INFO L225 Difference]: With dead ends: 59761 [2021-11-07 08:13:00,546 INFO L226 Difference]: Without dead ends: 42103 [2021-11-07 08:13:00,572 INFO L786 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 [2021-11-07 08:13:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42103 states. [2021-11-07 08:13:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42103 to 42101. [2021-11-07 08:13:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42101 states, 42100 states have (on average 1.186959619952494) internal successors, (49971), 42100 states have internal predecessors, (49971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42101 states to 42101 states and 49971 transitions. [2021-11-07 08:13:01,366 INFO L78 Accepts]: Start accepts. Automaton has 42101 states and 49971 transitions. Word has length 321 [2021-11-07 08:13:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:01,367 INFO L470 AbstractCegarLoop]: Abstraction has 42101 states and 49971 transitions. [2021-11-07 08:13:01,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:01,368 INFO L276 IsEmpty]: Start isEmpty. Operand 42101 states and 49971 transitions. [2021-11-07 08:13:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-07 08:13:01,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:01,378 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:01,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:13:01,379 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:01,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash -515432322, now seen corresponding path program 1 times [2021-11-07 08:13:01,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:01,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41883071] [2021-11-07 08:13:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:01,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 08:13:01,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:01,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41883071] [2021-11-07 08:13:01,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41883071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:01,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:01,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:01,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592672626] [2021-11-07 08:13:01,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:13:01,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:01,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:13:01,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:13:01,619 INFO L87 Difference]: Start difference. First operand 42101 states and 49971 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:12,187 INFO L93 Difference]: Finished difference Result 142668 states and 170381 transitions. [2021-11-07 08:13:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:13:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-11-07 08:13:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:12,351 INFO L225 Difference]: With dead ends: 142668 [2021-11-07 08:13:12,352 INFO L226 Difference]: Without dead ends: 101356 [2021-11-07 08:13:12,406 INFO L786 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 [2021-11-07 08:13:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101356 states. [2021-11-07 08:13:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101356 to 100436. [2021-11-07 08:13:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100436 states, 100435 states have (on average 1.1701498481605017) internal successors, (117524), 100435 states have internal predecessors, (117524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100436 states to 100436 states and 117524 transitions. [2021-11-07 08:13:15,565 INFO L78 Accepts]: Start accepts. Automaton has 100436 states and 117524 transitions. Word has length 321 [2021-11-07 08:13:15,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:15,566 INFO L470 AbstractCegarLoop]: Abstraction has 100436 states and 117524 transitions. [2021-11-07 08:13:15,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 100436 states and 117524 transitions. [2021-11-07 08:13:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-07 08:13:15,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:15,595 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:15,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:13:15,596 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash -811172309, now seen corresponding path program 1 times [2021-11-07 08:13:15,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:15,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17503171] [2021-11-07 08:13:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:15,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-07 08:13:15,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:15,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17503171] [2021-11-07 08:13:15,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17503171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:15,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:15,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:13:15,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326183051] [2021-11-07 08:13:15,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:15,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:15,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:15,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:15,806 INFO L87 Difference]: Start difference. First operand 100436 states and 117524 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:21,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:21,473 INFO L93 Difference]: Finished difference Result 189847 states and 223207 transitions. [2021-11-07 08:13:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:21,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2021-11-07 08:13:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:21,654 INFO L225 Difference]: With dead ends: 189847 [2021-11-07 08:13:21,654 INFO L226 Difference]: Without dead ends: 100444 [2021-11-07 08:13:21,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:21,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100444 states. [2021-11-07 08:13:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100444 to 100436. [2021-11-07 08:13:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100436 states, 100435 states have (on average 1.1695026634141485) internal successors, (117459), 100435 states have internal predecessors, (117459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100436 states to 100436 states and 117459 transitions. [2021-11-07 08:13:24,014 INFO L78 Accepts]: Start accepts. Automaton has 100436 states and 117459 transitions. Word has length 330 [2021-11-07 08:13:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:24,015 INFO L470 AbstractCegarLoop]: Abstraction has 100436 states and 117459 transitions. [2021-11-07 08:13:24,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 100436 states and 117459 transitions. [2021-11-07 08:13:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-07 08:13:24,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:24,068 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:24,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:13:24,069 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1819442547, now seen corresponding path program 1 times [2021-11-07 08:13:24,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:24,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918389718] [2021-11-07 08:13:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:24,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 233 proven. 110 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 08:13:24,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:24,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918389718] [2021-11-07 08:13:24,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918389718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:24,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680567264] [2021-11-07 08:13:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:24,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:24,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:24,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:13:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:24,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:13:24,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 08:13:26,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680567264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:26,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:13:26,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-07 08:13:26,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069434567] [2021-11-07 08:13:26,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:26,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:13:26,238 INFO L87 Difference]: Start difference. First operand 100436 states and 117459 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:31,381 INFO L93 Difference]: Finished difference Result 200082 states and 234124 transitions. [2021-11-07 08:13:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:31,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2021-11-07 08:13:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:31,525 INFO L225 Difference]: With dead ends: 200082 [2021-11-07 08:13:31,525 INFO L226 Difference]: Without dead ends: 100435 [2021-11-07 08:13:31,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:13:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100435 states. [2021-11-07 08:13:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100435 to 99646. [2021-11-07 08:13:33,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99646 states, 99645 states have (on average 1.1240102363390034) internal successors, (112002), 99645 states have internal predecessors, (112002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99646 states to 99646 states and 112002 transitions. [2021-11-07 08:13:33,416 INFO L78 Accepts]: Start accepts. Automaton has 99646 states and 112002 transitions. Word has length 359 [2021-11-07 08:13:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:33,417 INFO L470 AbstractCegarLoop]: Abstraction has 99646 states and 112002 transitions. [2021-11-07 08:13:33,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 99646 states and 112002 transitions. [2021-11-07 08:13:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-07 08:13:33,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:33,429 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:33,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 08:13:33,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f27fad9-ee7d-41b0-b746-9d1dad3c6843/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:33,656 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:33,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1112506830, now seen corresponding path program 1 times [2021-11-07 08:13:33,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:33,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823554323] [2021-11-07 08:13:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:33,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 452 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-07 08:13:33,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:33,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823554323] [2021-11-07 08:13:33,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823554323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:33,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:33,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:33,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370519107] [2021-11-07 08:13:33,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:33,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:33,952 INFO L87 Difference]: Start difference. First operand 99646 states and 112002 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:40,122 INFO L93 Difference]: Finished difference Result 226845 states and 257623 transitions. [2021-11-07 08:13:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:40,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 389 [2021-11-07 08:13:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:40,293 INFO L225 Difference]: With dead ends: 226845 [2021-11-07 08:13:40,293 INFO L226 Difference]: Without dead ends: 127988 [2021-11-07 08:13:40,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127988 states. [2021-11-07 08:13:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127988 to 126394. [2021-11-07 08:13:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126394 states, 126393 states have (on average 1.1274516784948534) internal successors, (142502), 126393 states have internal predecessors, (142502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126394 states to 126394 states and 142502 transitions. [2021-11-07 08:13:42,544 INFO L78 Accepts]: Start accepts. Automaton has 126394 states and 142502 transitions. Word has length 389 [2021-11-07 08:13:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:42,545 INFO L470 AbstractCegarLoop]: Abstraction has 126394 states and 142502 transitions. [2021-11-07 08:13:42,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 126394 states and 142502 transitions. [2021-11-07 08:13:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-07 08:13:42,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:42,563 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:42,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:13:42,564 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1062572237, now seen corresponding path program 1 times [2021-11-07 08:13:42,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:42,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283798552] [2021-11-07 08:13:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:42,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 350 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-07 08:13:42,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:42,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283798552] [2021-11-07 08:13:42,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283798552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:42,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:42,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:42,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996437677] [2021-11-07 08:13:42,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:42,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:42,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:42,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:42,822 INFO L87 Difference]: Start difference. First operand 126394 states and 142502 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:49,158 INFO L93 Difference]: Finished difference Result 281133 states and 319659 transitions. [2021-11-07 08:13:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 427 [2021-11-07 08:13:49,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:49,362 INFO L225 Difference]: With dead ends: 281133 [2021-11-07 08:13:49,362 INFO L226 Difference]: Without dead ends: 155528 [2021-11-07 08:13:49,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155528 states. [2021-11-07 08:13:51,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155528 to 153937. [2021-11-07 08:13:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153937 states, 153936 states have (on average 1.110916224924644) internal successors, (171010), 153936 states have internal predecessors, (171010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153937 states to 153937 states and 171010 transitions. [2021-11-07 08:13:52,490 INFO L78 Accepts]: Start accepts. Automaton has 153937 states and 171010 transitions. Word has length 427 [2021-11-07 08:13:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:52,492 INFO L470 AbstractCegarLoop]: Abstraction has 153937 states and 171010 transitions. [2021-11-07 08:13:52,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 153937 states and 171010 transitions. [2021-11-07 08:13:52,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2021-11-07 08:13:52,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:52,594 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:52,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:13:52,596 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1708302603, now seen corresponding path program 1 times [2021-11-07 08:13:52,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:52,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295186027] [2021-11-07 08:13:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:52,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 831 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-07 08:13:52,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:52,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295186027] [2021-11-07 08:13:52,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295186027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:52,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:52,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:52,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546588386] [2021-11-07 08:13:52,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:52,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:52,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:52,925 INFO L87 Difference]: Start difference. First operand 153937 states and 171010 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:58,678 INFO L93 Difference]: Finished difference Result 307095 states and 341246 transitions. [2021-11-07 08:13:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:58,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 546 [2021-11-07 08:13:58,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:58,941 INFO L225 Difference]: With dead ends: 307095 [2021-11-07 08:13:58,942 INFO L226 Difference]: Without dead ends: 153947 [2021-11-07 08:13:59,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153947 states. [2021-11-07 08:14:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153947 to 153930. [2021-11-07 08:14:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153930 states, 153929 states have (on average 1.0836879340475154) internal successors, (166811), 153929 states have internal predecessors, (166811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153930 states to 153930 states and 166811 transitions. [2021-11-07 08:14:01,547 INFO L78 Accepts]: Start accepts. Automaton has 153930 states and 166811 transitions. Word has length 546 [2021-11-07 08:14:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:01,548 INFO L470 AbstractCegarLoop]: Abstraction has 153930 states and 166811 transitions. [2021-11-07 08:14:01,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 153930 states and 166811 transitions. [2021-11-07 08:14:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-11-07 08:14:01,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:01,575 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:01,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:14:01,575 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2011980910, now seen corresponding path program 1 times [2021-11-07 08:14:01,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:01,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538202691] [2021-11-07 08:14:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:01,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 753 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-07 08:14:01,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:01,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538202691] [2021-11-07 08:14:01,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538202691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:01,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:01,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:01,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754655154] [2021-11-07 08:14:01,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:01,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:01,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:01,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:01,783 INFO L87 Difference]: Start difference. First operand 153930 states and 166811 transitions. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:07,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:07,417 INFO L93 Difference]: Finished difference Result 314917 states and 340710 transitions. [2021-11-07 08:14:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:07,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 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 582 [2021-11-07 08:14:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:07,622 INFO L225 Difference]: With dead ends: 314917 [2021-11-07 08:14:07,622 INFO L226 Difference]: Without dead ends: 158628 [2021-11-07 08:14:07,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158628 states. [2021-11-07 08:14:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158628 to 147599. [2021-11-07 08:14:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147599 states, 147598 states have (on average 1.0591877938725458) internal successors, (156334), 147598 states have internal predecessors, (156334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147599 states to 147599 states and 156334 transitions. [2021-11-07 08:14:10,383 INFO L78 Accepts]: Start accepts. Automaton has 147599 states and 156334 transitions. Word has length 582 [2021-11-07 08:14:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:10,384 INFO L470 AbstractCegarLoop]: Abstraction has 147599 states and 156334 transitions. [2021-11-07 08:14:10,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 147599 states and 156334 transitions. [2021-11-07 08:14:10,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2021-11-07 08:14:10,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:10,408 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:10,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:14:10,409 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:10,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1424107546, now seen corresponding path program 1 times [2021-11-07 08:14:10,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:10,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859244912] [2021-11-07 08:14:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:10,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 565 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-11-07 08:14:10,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:10,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859244912] [2021-11-07 08:14:10,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859244912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:10,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:10,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:10,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822519384] [2021-11-07 08:14:10,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:10,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:10,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:10,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:10,717 INFO L87 Difference]: Start difference. First operand 147599 states and 156334 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:15,709 INFO L93 Difference]: Finished difference Result 288864 states and 306795 transitions. [2021-11-07 08:14:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 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 587 [2021-11-07 08:14:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:15,886 INFO L225 Difference]: With dead ends: 288864 [2021-11-07 08:14:15,886 INFO L226 Difference]: Without dead ends: 157013 [2021-11-07 08:14:15,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157013 states. [2021-11-07 08:14:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157013 to 157011. [2021-11-07 08:14:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157011 states, 157010 states have (on average 1.056614228393096) internal successors, (165899), 157010 states have internal predecessors, (165899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157011 states to 157011 states and 165899 transitions. [2021-11-07 08:14:18,853 INFO L78 Accepts]: Start accepts. Automaton has 157011 states and 165899 transitions. Word has length 587 [2021-11-07 08:14:18,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:18,854 INFO L470 AbstractCegarLoop]: Abstraction has 157011 states and 165899 transitions. [2021-11-07 08:14:18,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 157011 states and 165899 transitions. [2021-11-07 08:14:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2021-11-07 08:14:18,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:18,872 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:18,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:14:18,872 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:18,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1269831408, now seen corresponding path program 1 times [2021-11-07 08:14:18,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:18,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852240248] [2021-11-07 08:14:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:18,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 589 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-07 08:14:19,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:19,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852240248] [2021-11-07 08:14:19,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852240248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:19,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:19,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:19,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031373566] [2021-11-07 08:14:19,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:19,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:19,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:19,169 INFO L87 Difference]: Start difference. First operand 157011 states and 165899 transitions. Second operand has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 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)