./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 686ecb1010b71c794fc4e873862aa984c2fdfbe32a68bd8271c0851d6420f945 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:02:47,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:02:47,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:02:47,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:02:47,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:02:47,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:02:47,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:02:47,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:02:47,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:02:47,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:02:47,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:02:47,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:02:47,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:02:47,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:02:47,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:02:47,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:02:47,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:02:47,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:02:47,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:02:47,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:02:47,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:02:47,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:02:47,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:02:47,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:02:47,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:02:47,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:02:47,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:02:47,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:02:47,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:02:47,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:02:47,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:02:47,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:02:47,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:02:47,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:02:47,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:02:47,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:02:47,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:02:47,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:02:47,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:02:47,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:02:47,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:02:47,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:02:47,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:02:47,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:02:47,134 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:02:47,134 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:02:47,135 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:02:47,135 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:02:47,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:02:47,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:02:47,136 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:02:47,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:02:47,136 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:02:47,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:02:47,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:02:47,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:02:47,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:02:47,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:02:47,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:02:47,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:02:47,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:02:47,138 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:02:47,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:02:47,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:02:47,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:02:47,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:02:47,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:02:47,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:02:47,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:02:47,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:02:47,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:02:47,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:02:47,140 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:02:47,140 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:02:47,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:02:47,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:02:47,141 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 686ecb1010b71c794fc4e873862aa984c2fdfbe32a68bd8271c0851d6420f945 [2021-12-17 21:02:47,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:02:47,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:02:47,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:02:47,372 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:02:47,373 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:02:47,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c [2021-12-17 21:02:47,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd223eca9/33e7861640d548b5838c1f68b144d254/FLAGcec5b3ba1 [2021-12-17 21:02:47,782 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:02:47,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c [2021-12-17 21:02:47,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd223eca9/33e7861640d548b5838c1f68b144d254/FLAGcec5b3ba1 [2021-12-17 21:02:47,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd223eca9/33e7861640d548b5838c1f68b144d254 [2021-12-17 21:02:47,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:02:47,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:02:47,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:02:47,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:02:47,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:02:47,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:02:47" (1/1) ... [2021-12-17 21:02:47,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151b65cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:47, skipping insertion in model container [2021-12-17 21:02:47,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:02:47" (1/1) ... [2021-12-17 21:02:47,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:02:47,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:02:47,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c[913,926] [2021-12-17 21:02:47,993 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c[5977,5990] [2021-12-17 21:02:48,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:02:48,073 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:02:48,081 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c[913,926] [2021-12-17 21:02:48,090 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c[5977,5990] [2021-12-17 21:02:48,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:02:48,144 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:02:48,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48 WrapperNode [2021-12-17 21:02:48,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:02:48,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:02:48,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:02:48,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:02:48,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,200 INFO L137 Inliner]: procedures = 62, calls = 69, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 765 [2021-12-17 21:02:48,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:02:48,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:02:48,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:02:48,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:02:48,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:02:48,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:02:48,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:02:48,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:02:48,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:02:48,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:02:48,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 21:02:48,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:02:48,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:02:48,306 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:02:48,306 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:02:48,306 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-17 21:02:48,306 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-17 21:02:48,306 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:02:48,306 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:02:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:02:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:02:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:02:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:02:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:02:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:02:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:02:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:02:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:02:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:02:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:02:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:02:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:02:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:02:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:02:48,406 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:02:48,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:02:48,973 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:02:48,980 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:02:48,980 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-12-17 21:02:48,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:02:48 BoogieIcfgContainer [2021-12-17 21:02:48,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:02:48,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:02:48,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:02:48,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:02:48,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:02:47" (1/3) ... [2021-12-17 21:02:48,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b59e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:02:48, skipping insertion in model container [2021-12-17 21:02:48,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (2/3) ... [2021-12-17 21:02:48,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b59e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:02:48, skipping insertion in model container [2021-12-17 21:02:48,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:02:48" (3/3) ... [2021-12-17 21:02:48,988 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.07.cil-1.c [2021-12-17 21:02:48,992 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:02:48,992 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:02:49,026 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:02:49,031 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:02:49,031 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:02:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 329 states, 290 states have (on average 1.6241379310344828) internal successors, (471), 295 states have internal predecessors, (471), 27 states have call successors, (27), 9 states have call predecessors, (27), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 21:02:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 21:02:49,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:49,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:49,054 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:49,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:49,060 INFO L85 PathProgramCache]: Analyzing trace with hash 679233758, now seen corresponding path program 1 times [2021-12-17 21:02:49,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:49,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213788469] [2021-12-17 21:02:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:49,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 21:02:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:49,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:49,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213788469] [2021-12-17 21:02:49,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213788469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:49,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:49,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:02:49,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317164486] [2021-12-17 21:02:49,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:49,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:49,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:49,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:49,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:02:49,315 INFO L87 Difference]: Start difference. First operand has 329 states, 290 states have (on average 1.6241379310344828) internal successors, (471), 295 states have internal predecessors, (471), 27 states have call successors, (27), 9 states have call predecessors, (27), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:49,557 INFO L93 Difference]: Finished difference Result 708 states and 1128 transitions. [2021-12-17 21:02:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:02:49,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-17 21:02:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:49,575 INFO L225 Difference]: With dead ends: 708 [2021-12-17 21:02:49,575 INFO L226 Difference]: Without dead ends: 389 [2021-12-17 21:02:49,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:49,603 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 644 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:49,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 825 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:02:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-17 21:02:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 383. [2021-12-17 21:02:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 339 states have (on average 1.4985250737463127) internal successors, (508), 343 states have internal predecessors, (508), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (35), 29 states have call predecessors, (35), 29 states have call successors, (35) [2021-12-17 21:02:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 574 transitions. [2021-12-17 21:02:49,674 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 574 transitions. Word has length 44 [2021-12-17 21:02:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:49,674 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 574 transitions. [2021-12-17 21:02:49,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 574 transitions. [2021-12-17 21:02:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:02:49,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:49,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:49,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:02:49,678 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash -847205656, now seen corresponding path program 1 times [2021-12-17 21:02:49,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:49,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195869222] [2021-12-17 21:02:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:49,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 21:02:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:49,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:49,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195869222] [2021-12-17 21:02:49,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195869222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:49,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:49,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:02:49,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889880722] [2021-12-17 21:02:49,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:49,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:49,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:02:49,755 INFO L87 Difference]: Start difference. First operand 383 states and 574 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:50,007 INFO L93 Difference]: Finished difference Result 631 states and 914 transitions. [2021-12-17 21:02:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:02:50,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-17 21:02:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:50,011 INFO L225 Difference]: With dead ends: 631 [2021-12-17 21:02:50,011 INFO L226 Difference]: Without dead ends: 507 [2021-12-17 21:02:50,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:50,012 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 268 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:50,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 1071 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:02:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-12-17 21:02:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 450. [2021-12-17 21:02:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 400 states have (on average 1.48) internal successors, (592), 404 states have internal predecessors, (592), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-12-17 21:02:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 664 transitions. [2021-12-17 21:02:50,048 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 664 transitions. Word has length 45 [2021-12-17 21:02:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:50,049 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 664 transitions. [2021-12-17 21:02:50,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 664 transitions. [2021-12-17 21:02:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:02:50,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:50,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:50,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:02:50,051 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:50,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:50,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2131563117, now seen corresponding path program 1 times [2021-12-17 21:02:50,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:50,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034574986] [2021-12-17 21:02:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:50,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 21:02:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:50,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:50,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034574986] [2021-12-17 21:02:50,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034574986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:50,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:50,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:02:50,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039726559] [2021-12-17 21:02:50,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:50,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:50,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:02:50,096 INFO L87 Difference]: Start difference. First operand 450 states and 664 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:50,223 INFO L93 Difference]: Finished difference Result 858 states and 1223 transitions. [2021-12-17 21:02:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:02:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-17 21:02:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:50,227 INFO L225 Difference]: With dead ends: 858 [2021-12-17 21:02:50,227 INFO L226 Difference]: Without dead ends: 667 [2021-12-17 21:02:50,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:50,233 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 653 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:50,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 824 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:02:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-17 21:02:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 615. [2021-12-17 21:02:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 546 states have (on average 1.4322344322344323) internal successors, (782), 553 states have internal predecessors, (782), 45 states have call successors, (45), 21 states have call predecessors, (45), 22 states have return successors, (55), 41 states have call predecessors, (55), 43 states have call successors, (55) [2021-12-17 21:02:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 882 transitions. [2021-12-17 21:02:50,285 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 882 transitions. Word has length 45 [2021-12-17 21:02:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:50,285 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 882 transitions. [2021-12-17 21:02:50,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 882 transitions. [2021-12-17 21:02:50,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 21:02:50,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:50,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:50,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:02:50,288 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:50,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:50,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1411746514, now seen corresponding path program 1 times [2021-12-17 21:02:50,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:50,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874072261] [2021-12-17 21:02:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:50,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:02:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 21:02:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:02:50,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874072261] [2021-12-17 21:02:50,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874072261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:50,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:50,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:02:50,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301499484] [2021-12-17 21:02:50,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:50,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:50,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:50,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:50,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:02:50,358 INFO L87 Difference]: Start difference. First operand 615 states and 882 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:02:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:50,619 INFO L93 Difference]: Finished difference Result 1199 states and 1667 transitions. [2021-12-17 21:02:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:02:50,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-17 21:02:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:50,623 INFO L225 Difference]: With dead ends: 1199 [2021-12-17 21:02:50,624 INFO L226 Difference]: Without dead ends: 843 [2021-12-17 21:02:50,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:50,625 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 252 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:50,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 1103 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:02:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-12-17 21:02:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 805. [2021-12-17 21:02:50,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 712 states have (on average 1.3792134831460674) internal successors, (982), 721 states have internal predecessors, (982), 59 states have call successors, (59), 29 states have call predecessors, (59), 32 states have return successors, (79), 55 states have call predecessors, (79), 57 states have call successors, (79) [2021-12-17 21:02:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1120 transitions. [2021-12-17 21:02:50,654 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1120 transitions. Word has length 62 [2021-12-17 21:02:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:50,654 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1120 transitions. [2021-12-17 21:02:50,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:02:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1120 transitions. [2021-12-17 21:02:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 21:02:50,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:50,657 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:02:50,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:02:50,657 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:50,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1771502045, now seen corresponding path program 1 times [2021-12-17 21:02:50,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:50,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765245689] [2021-12-17 21:02:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:50,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:02:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:02:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 21:02:50,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:50,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765245689] [2021-12-17 21:02:50,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765245689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:50,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:50,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:02:50,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163745541] [2021-12-17 21:02:50,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:50,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:50,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:02:50,698 INFO L87 Difference]: Start difference. First operand 805 states and 1120 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 21:02:50,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:50,816 INFO L93 Difference]: Finished difference Result 1458 states and 1973 transitions. [2021-12-17 21:02:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:02:50,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-17 21:02:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:50,821 INFO L225 Difference]: With dead ends: 1458 [2021-12-17 21:02:50,822 INFO L226 Difference]: Without dead ends: 1004 [2021-12-17 21:02:50,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:50,823 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 640 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:50,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 821 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:02:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-12-17 21:02:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 949. [2021-12-17 21:02:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 840 states have (on average 1.348809523809524) internal successors, (1133), 851 states have internal predecessors, (1133), 67 states have call successors, (67), 35 states have call predecessors, (67), 40 states have return successors, (93), 63 states have call predecessors, (93), 65 states have call successors, (93) [2021-12-17 21:02:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1293 transitions. [2021-12-17 21:02:50,872 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1293 transitions. Word has length 67 [2021-12-17 21:02:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:50,872 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1293 transitions. [2021-12-17 21:02:50,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 21:02:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1293 transitions. [2021-12-17 21:02:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 21:02:50,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:50,874 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:02:50,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:02:50,875 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1913188561, now seen corresponding path program 1 times [2021-12-17 21:02:50,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:50,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002848214] [2021-12-17 21:02:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:50,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:02:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:02:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:02:50,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002848214] [2021-12-17 21:02:50,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002848214] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:02:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261578604] [2021-12-17 21:02:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:50,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:50,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:02:50,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:02:50,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:02:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:02:51,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:02:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:51,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:02:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:02:51,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261578604] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 21:02:51,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:02:51,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-17 21:02:51,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952290755] [2021-12-17 21:02:51,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:51,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:51,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:51,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:51,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:02:51,368 INFO L87 Difference]: Start difference. First operand 949 states and 1293 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:02:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:51,471 INFO L93 Difference]: Finished difference Result 1005 states and 1361 transitions. [2021-12-17 21:02:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 21:02:51,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-17 21:02:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:51,475 INFO L225 Difference]: With dead ends: 1005 [2021-12-17 21:02:51,476 INFO L226 Difference]: Without dead ends: 1002 [2021-12-17 21:02:51,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:02:51,481 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 869 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:51,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 575 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:02:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-12-17 21:02:51,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 948. [2021-12-17 21:02:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 840 states have (on average 1.3464285714285715) internal successors, (1131), 850 states have internal predecessors, (1131), 66 states have call successors, (66), 35 states have call predecessors, (66), 40 states have return successors, (93), 63 states have call predecessors, (93), 65 states have call successors, (93) [2021-12-17 21:02:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1290 transitions. [2021-12-17 21:02:51,530 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1290 transitions. Word has length 68 [2021-12-17 21:02:51,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:51,531 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1290 transitions. [2021-12-17 21:02:51,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:02:51,531 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1290 transitions. [2021-12-17 21:02:51,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 21:02:51,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:51,534 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:02:51,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:02:51,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-17 21:02:51,748 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash -821723040, now seen corresponding path program 1 times [2021-12-17 21:02:51,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:51,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924732387] [2021-12-17 21:02:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:51,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:02:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:02:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:02:51,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:51,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924732387] [2021-12-17 21:02:51,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924732387] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:02:51,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429426215] [2021-12-17 21:02:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:51,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:51,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:02:51,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:02:51,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 21:02:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:02:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:02:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:52,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:02:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:02:52,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429426215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:02:52,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 21:02:52,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-17 21:02:52,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154028792] [2021-12-17 21:02:52,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 21:02:52,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 21:02:52,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:52,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 21:02:52,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:02:52,320 INFO L87 Difference]: Start difference. First operand 948 states and 1290 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 21:02:53,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:53,312 INFO L93 Difference]: Finished difference Result 2648 states and 3510 transitions. [2021-12-17 21:02:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 21:02:53,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-17 21:02:53,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:53,320 INFO L225 Difference]: With dead ends: 2648 [2021-12-17 21:02:53,321 INFO L226 Difference]: Without dead ends: 2104 [2021-12-17 21:02:53,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 21:02:53,324 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 1007 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:53,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 3162 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:02:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-12-17 21:02:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1337. [2021-12-17 21:02:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1190 states have (on average 1.315126050420168) internal successors, (1565), 1208 states have internal predecessors, (1565), 86 states have call successors, (86), 49 states have call predecessors, (86), 59 states have return successors, (127), 80 states have call predecessors, (127), 85 states have call successors, (127) [2021-12-17 21:02:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1778 transitions. [2021-12-17 21:02:53,388 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1778 transitions. Word has length 69 [2021-12-17 21:02:53,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:53,388 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 1778 transitions. [2021-12-17 21:02:53,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 21:02:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1778 transitions. [2021-12-17 21:02:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-17 21:02:53,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:53,391 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:53,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 21:02:53,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-17 21:02:53,599 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash 703078240, now seen corresponding path program 1 times [2021-12-17 21:02:53,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:53,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260824924] [2021-12-17 21:02:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:53,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:02:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 21:02:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 21:02:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 21:02:53,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:53,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260824924] [2021-12-17 21:02:53,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260824924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:02:53,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948205879] [2021-12-17 21:02:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:53,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:53,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:02:53,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:02:53,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 21:02:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:02:53,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:02:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:02:53,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:02:53,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948205879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:53,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:02:53,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:02:53,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665877053] [2021-12-17 21:02:53,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:53,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:02:53,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:02:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:53,854 INFO L87 Difference]: Start difference. First operand 1337 states and 1778 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 21:02:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:53,901 INFO L93 Difference]: Finished difference Result 2060 states and 2716 transitions. [2021-12-17 21:02:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:02:53,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-17 21:02:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:53,907 INFO L225 Difference]: With dead ends: 2060 [2021-12-17 21:02:53,907 INFO L226 Difference]: Without dead ends: 1215 [2021-12-17 21:02:53,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:53,909 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 443 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:53,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 589 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:02:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-12-17 21:02:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1200. [2021-12-17 21:02:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1069 states have (on average 1.3161833489242283) internal successors, (1407), 1086 states have internal predecessors, (1407), 78 states have call successors, (78), 43 states have call predecessors, (78), 51 states have return successors, (113), 71 states have call predecessors, (113), 77 states have call successors, (113) [2021-12-17 21:02:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1598 transitions. [2021-12-17 21:02:53,951 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1598 transitions. Word has length 88 [2021-12-17 21:02:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:53,951 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1598 transitions. [2021-12-17 21:02:53,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 21:02:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1598 transitions. [2021-12-17 21:02:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 21:02:53,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:53,954 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:53,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 21:02:54,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:54,156 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1962786176, now seen corresponding path program 1 times [2021-12-17 21:02:54,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:54,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702058766] [2021-12-17 21:02:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:54,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:02:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:02:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 21:02:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 21:02:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 21:02:54,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:54,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702058766] [2021-12-17 21:02:54,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702058766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:02:54,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291844146] [2021-12-17 21:02:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:54,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:54,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:02:54,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:02:54,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 21:02:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:02:54,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:02:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:02:54,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:02:54,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291844146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:54,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:02:54,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:02:54,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332224632] [2021-12-17 21:02:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:54,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:02:54,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:02:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:54,452 INFO L87 Difference]: Start difference. First operand 1200 states and 1598 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 21:02:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:54,484 INFO L93 Difference]: Finished difference Result 1579 states and 2066 transitions. [2021-12-17 21:02:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:02:54,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-17 21:02:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:54,486 INFO L225 Difference]: With dead ends: 1579 [2021-12-17 21:02:54,486 INFO L226 Difference]: Without dead ends: 253 [2021-12-17 21:02:54,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:54,501 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 62 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:54,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 986 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:02:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-17 21:02:54,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-12-17 21:02:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 225 states have (on average 1.551111111111111) internal successors, (349), 226 states have internal predecessors, (349), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 21:02:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 391 transitions. [2021-12-17 21:02:54,508 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 391 transitions. Word has length 103 [2021-12-17 21:02:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:54,508 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 391 transitions. [2021-12-17 21:02:54,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 21:02:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 391 transitions. [2021-12-17 21:02:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:02:54,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:54,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:54,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 21:02:54,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:54,723 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 366966274, now seen corresponding path program 1 times [2021-12-17 21:02:54,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:54,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069430173] [2021-12-17 21:02:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:54,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:02:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:02:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:02:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:02:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:54,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:54,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069430173] [2021-12-17 21:02:54,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069430173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:54,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:54,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:02:54,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274833925] [2021-12-17 21:02:54,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:54,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:02:54,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:02:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:54,805 INFO L87 Difference]: Start difference. First operand 253 states and 391 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:02:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:55,327 INFO L93 Difference]: Finished difference Result 581 states and 913 transitions. [2021-12-17 21:02:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:02:55,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:02:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:55,329 INFO L225 Difference]: With dead ends: 581 [2021-12-17 21:02:55,329 INFO L226 Difference]: Without dead ends: 340 [2021-12-17 21:02:55,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:02:55,331 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 650 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:55,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 704 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:02:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-17 21:02:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 253. [2021-12-17 21:02:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 225 states have (on average 1.5466666666666666) internal successors, (348), 226 states have internal predecessors, (348), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 21:02:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 390 transitions. [2021-12-17 21:02:55,342 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 390 transitions. Word has length 123 [2021-12-17 21:02:55,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:55,342 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 390 transitions. [2021-12-17 21:02:55,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:02:55,343 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 390 transitions. [2021-12-17 21:02:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:02:55,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:55,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:55,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:02:55,345 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:55,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1796650300, now seen corresponding path program 1 times [2021-12-17 21:02:55,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:55,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547172491] [2021-12-17 21:02:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:55,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:02:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:02:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:02:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:02:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:55,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:55,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547172491] [2021-12-17 21:02:55,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547172491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:55,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:55,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:02:55,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973922863] [2021-12-17 21:02:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:55,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:02:55,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:55,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:02:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:02:55,435 INFO L87 Difference]: Start difference. First operand 253 states and 390 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:02:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:56,674 INFO L93 Difference]: Finished difference Result 909 states and 1437 transitions. [2021-12-17 21:02:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:02:56,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:02:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:56,678 INFO L225 Difference]: With dead ends: 909 [2021-12-17 21:02:56,678 INFO L226 Difference]: Without dead ends: 672 [2021-12-17 21:02:56,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:02:56,679 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 978 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:56,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 1232 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:02:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-12-17 21:02:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 499. [2021-12-17 21:02:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 448 states have (on average 1.5602678571428572) internal successors, (699), 450 states have internal predecessors, (699), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2021-12-17 21:02:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 776 transitions. [2021-12-17 21:02:56,710 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 776 transitions. Word has length 123 [2021-12-17 21:02:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:56,711 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 776 transitions. [2021-12-17 21:02:56,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:02:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 776 transitions. [2021-12-17 21:02:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:02:56,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:56,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:56,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 21:02:56,713 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1772752968, now seen corresponding path program 1 times [2021-12-17 21:02:56,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:56,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495177914] [2021-12-17 21:02:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:56,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:02:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:02:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:02:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:02:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:56,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:56,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495177914] [2021-12-17 21:02:56,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495177914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:56,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:56,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:02:56,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961520051] [2021-12-17 21:02:56,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:56,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:02:56,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:02:56,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:56,807 INFO L87 Difference]: Start difference. First operand 499 states and 776 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:02:58,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:58,311 INFO L93 Difference]: Finished difference Result 1497 states and 2366 transitions. [2021-12-17 21:02:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:02:58,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:02:58,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:58,316 INFO L225 Difference]: With dead ends: 1497 [2021-12-17 21:02:58,316 INFO L226 Difference]: Without dead ends: 1014 [2021-12-17 21:02:58,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:02:58,318 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 992 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:58,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 1936 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:02:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-12-17 21:02:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 728. [2021-12-17 21:02:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 654 states have (on average 1.5535168195718654) internal successors, (1016), 657 states have internal predecessors, (1016), 53 states have call successors, (53), 18 states have call predecessors, (53), 20 states have return successors, (58), 54 states have call predecessors, (58), 53 states have call successors, (58) [2021-12-17 21:02:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1127 transitions. [2021-12-17 21:02:58,355 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1127 transitions. Word has length 123 [2021-12-17 21:02:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:58,355 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 1127 transitions. [2021-12-17 21:02:58,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:02:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1127 transitions. [2021-12-17 21:02:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:02:58,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:58,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:58,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:02:58,357 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:58,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1132920314, now seen corresponding path program 1 times [2021-12-17 21:02:58,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:58,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728770643] [2021-12-17 21:02:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:58,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:02:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:02:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:02:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:02:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:58,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:58,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728770643] [2021-12-17 21:02:58,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728770643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:58,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:58,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:02:58,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240129445] [2021-12-17 21:02:58,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:58,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:02:58,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:58,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:02:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:58,435 INFO L87 Difference]: Start difference. First operand 728 states and 1127 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:02:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:59,205 INFO L93 Difference]: Finished difference Result 1734 states and 2739 transitions. [2021-12-17 21:02:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:02:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:02:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:59,209 INFO L225 Difference]: With dead ends: 1734 [2021-12-17 21:02:59,209 INFO L226 Difference]: Without dead ends: 1022 [2021-12-17 21:02:59,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:02:59,211 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 759 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:59,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 994 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:02:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-12-17 21:02:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 728. [2021-12-17 21:02:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 654 states have (on average 1.5489296636085628) internal successors, (1013), 657 states have internal predecessors, (1013), 53 states have call successors, (53), 18 states have call predecessors, (53), 20 states have return successors, (58), 54 states have call predecessors, (58), 53 states have call successors, (58) [2021-12-17 21:02:59,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1124 transitions. [2021-12-17 21:02:59,241 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1124 transitions. Word has length 123 [2021-12-17 21:02:59,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:59,242 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 1124 transitions. [2021-12-17 21:02:59,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:02:59,242 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1124 transitions. [2021-12-17 21:02:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:02:59,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:59,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:59,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:02:59,243 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:59,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1295338308, now seen corresponding path program 1 times [2021-12-17 21:02:59,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:59,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148279550] [2021-12-17 21:02:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:59,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:02:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:02:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:02:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:02:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:59,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:59,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148279550] [2021-12-17 21:02:59,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148279550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:59,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:59,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:02:59,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659111391] [2021-12-17 21:02:59,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:59,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:02:59,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:02:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:59,333 INFO L87 Difference]: Start difference. First operand 728 states and 1124 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:00,806 INFO L93 Difference]: Finished difference Result 2358 states and 3703 transitions. [2021-12-17 21:03:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:03:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:03:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:00,813 INFO L225 Difference]: With dead ends: 2358 [2021-12-17 21:03:00,813 INFO L226 Difference]: Without dead ends: 1646 [2021-12-17 21:03:00,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:03:00,815 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 979 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:00,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 1914 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1914 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:03:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-12-17 21:03:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1193. [2021-12-17 21:03:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1073 states have (on average 1.543336439888164) internal successors, (1656), 1078 states have internal predecessors, (1656), 85 states have call successors, (85), 30 states have call predecessors, (85), 34 states have return successors, (98), 88 states have call predecessors, (98), 85 states have call successors, (98) [2021-12-17 21:03:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1839 transitions. [2021-12-17 21:03:00,865 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1839 transitions. Word has length 123 [2021-12-17 21:03:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:00,865 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 1839 transitions. [2021-12-17 21:03:00,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1839 transitions. [2021-12-17 21:03:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:03:00,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:00,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:00,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:03:00,867 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash -11804090, now seen corresponding path program 1 times [2021-12-17 21:03:00,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:00,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230961089] [2021-12-17 21:03:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:00,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:00,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:00,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:03:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:00,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:03:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:00,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:03:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:00,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:03:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:00,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230961089] [2021-12-17 21:03:00,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230961089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:00,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:00,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:00,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397336186] [2021-12-17 21:03:00,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:00,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:00,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:00,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:00,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:00,957 INFO L87 Difference]: Start difference. First operand 1193 states and 1839 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:02,545 INFO L93 Difference]: Finished difference Result 4031 states and 6306 transitions. [2021-12-17 21:03:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:03:02,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:03:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:02,555 INFO L225 Difference]: With dead ends: 4031 [2021-12-17 21:03:02,555 INFO L226 Difference]: Without dead ends: 2854 [2021-12-17 21:03:02,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:03:02,558 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 978 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1909 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:02,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 1909 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:03:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-12-17 21:03:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2122. [2021-12-17 21:03:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 1910 states have (on average 1.5382198952879582) internal successors, (2938), 1919 states have internal predecessors, (2938), 149 states have call successors, (149), 54 states have call predecessors, (149), 62 states have return successors, (184), 156 states have call predecessors, (184), 149 states have call successors, (184) [2021-12-17 21:03:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3271 transitions. [2021-12-17 21:03:02,647 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3271 transitions. Word has length 123 [2021-12-17 21:03:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:02,647 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 3271 transitions. [2021-12-17 21:03:02,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:02,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3271 transitions. [2021-12-17 21:03:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:03:02,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:02,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:02,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:03:02,649 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1885692676, now seen corresponding path program 1 times [2021-12-17 21:03:02,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:02,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593511184] [2021-12-17 21:03:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:02,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:03:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:03:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:03:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:03:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:02,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:02,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593511184] [2021-12-17 21:03:02,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593511184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:02,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:02,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:02,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036494668] [2021-12-17 21:03:02,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:02,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:02,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:02,727 INFO L87 Difference]: Start difference. First operand 2122 states and 3271 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:03,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:03,465 INFO L93 Difference]: Finished difference Result 4968 states and 7778 transitions. [2021-12-17 21:03:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:03:03,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:03:03,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:03,475 INFO L225 Difference]: With dead ends: 4968 [2021-12-17 21:03:03,475 INFO L226 Difference]: Without dead ends: 2862 [2021-12-17 21:03:03,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:03,480 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 815 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:03,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 881 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:03:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2021-12-17 21:03:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2122. [2021-12-17 21:03:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 1910 states have (on average 1.5335078534031414) internal successors, (2929), 1919 states have internal predecessors, (2929), 149 states have call successors, (149), 54 states have call predecessors, (149), 62 states have return successors, (184), 156 states have call predecessors, (184), 149 states have call successors, (184) [2021-12-17 21:03:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3262 transitions. [2021-12-17 21:03:03,573 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3262 transitions. Word has length 123 [2021-12-17 21:03:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:03,573 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 3262 transitions. [2021-12-17 21:03:03,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3262 transitions. [2021-12-17 21:03:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:03:03,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:03,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:03,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:03:03,575 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:03,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1378233722, now seen corresponding path program 1 times [2021-12-17 21:03:03,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369236885] [2021-12-17 21:03:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:03,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:03:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:03:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:03:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:03:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:03,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:03,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369236885] [2021-12-17 21:03:03,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369236885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:03,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:03,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:03,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884263951] [2021-12-17 21:03:03,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:03,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:03,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:03,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:03,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:03,666 INFO L87 Difference]: Start difference. First operand 2122 states and 3262 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:05,253 INFO L93 Difference]: Finished difference Result 7364 states and 11460 transitions. [2021-12-17 21:03:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:03:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:03:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:05,268 INFO L225 Difference]: With dead ends: 7364 [2021-12-17 21:03:05,268 INFO L226 Difference]: Without dead ends: 5258 [2021-12-17 21:03:05,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:03:05,273 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 970 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1879 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:05,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 1898 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1879 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:03:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2021-12-17 21:03:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 3996. [2021-12-17 21:03:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3600 states have (on average 1.5291666666666666) internal successors, (5505), 3617 states have internal predecessors, (5505), 277 states have call successors, (277), 102 states have call predecessors, (277), 118 states have return successors, (374), 292 states have call predecessors, (374), 277 states have call successors, (374) [2021-12-17 21:03:05,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 6156 transitions. [2021-12-17 21:03:05,472 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 6156 transitions. Word has length 123 [2021-12-17 21:03:05,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:05,472 INFO L470 AbstractCegarLoop]: Abstraction has 3996 states and 6156 transitions. [2021-12-17 21:03:05,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:05,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 6156 transitions. [2021-12-17 21:03:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:03:05,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:05,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:05,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:03:05,475 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:05,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1010330308, now seen corresponding path program 1 times [2021-12-17 21:03:05,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:05,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832690000] [2021-12-17 21:03:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:05,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:05,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:05,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:03:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:05,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:03:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:05,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:03:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:05,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:03:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:05,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:05,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832690000] [2021-12-17 21:03:05,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832690000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:05,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:05,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:05,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772803124] [2021-12-17 21:03:05,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:05,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:05,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:05,552 INFO L87 Difference]: Start difference. First operand 3996 states and 6156 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:07,579 INFO L93 Difference]: Finished difference Result 15764 states and 24506 transitions. [2021-12-17 21:03:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:03:07,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:03:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:07,623 INFO L225 Difference]: With dead ends: 15764 [2021-12-17 21:03:07,624 INFO L226 Difference]: Without dead ends: 11784 [2021-12-17 21:03:07,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:03:07,634 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 1260 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:07,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1282 Valid, 1883 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:03:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11784 states. [2021-12-17 21:03:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11784 to 7709. [2021-12-17 21:03:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7709 states, 6961 states have (on average 1.5289469903749462) internal successors, (10643), 6994 states have internal predecessors, (10643), 517 states have call successors, (517), 198 states have call predecessors, (517), 230 states have return successors, (792), 548 states have call predecessors, (792), 517 states have call successors, (792) [2021-12-17 21:03:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7709 states to 7709 states and 11952 transitions. [2021-12-17 21:03:08,065 INFO L78 Accepts]: Start accepts. Automaton has 7709 states and 11952 transitions. Word has length 123 [2021-12-17 21:03:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:08,065 INFO L470 AbstractCegarLoop]: Abstraction has 7709 states and 11952 transitions. [2021-12-17 21:03:08,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 7709 states and 11952 transitions. [2021-12-17 21:03:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:03:08,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:08,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:08,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:03:08,071 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:08,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1683565882, now seen corresponding path program 1 times [2021-12-17 21:03:08,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:08,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343635543] [2021-12-17 21:03:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:08,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:03:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:03:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:03:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:03:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:08,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:08,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343635543] [2021-12-17 21:03:08,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343635543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:08,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:08,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:08,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332110400] [2021-12-17 21:03:08,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:08,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:08,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:08,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:08,151 INFO L87 Difference]: Start difference. First operand 7709 states and 11952 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:09,219 INFO L93 Difference]: Finished difference Result 17800 states and 27999 transitions. [2021-12-17 21:03:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:03:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:03:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:09,245 INFO L225 Difference]: With dead ends: 17800 [2021-12-17 21:03:09,245 INFO L226 Difference]: Without dead ends: 10107 [2021-12-17 21:03:09,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:09,261 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 816 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:09,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 867 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:03:09,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10107 states. [2021-12-17 21:03:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10107 to 7709. [2021-12-17 21:03:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7709 states, 6961 states have (on average 1.5242062921993966) internal successors, (10610), 6994 states have internal predecessors, (10610), 517 states have call successors, (517), 198 states have call predecessors, (517), 230 states have return successors, (792), 548 states have call predecessors, (792), 517 states have call successors, (792) [2021-12-17 21:03:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7709 states to 7709 states and 11919 transitions. [2021-12-17 21:03:09,625 INFO L78 Accepts]: Start accepts. Automaton has 7709 states and 11919 transitions. Word has length 123 [2021-12-17 21:03:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:09,626 INFO L470 AbstractCegarLoop]: Abstraction has 7709 states and 11919 transitions. [2021-12-17 21:03:09,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 7709 states and 11919 transitions. [2021-12-17 21:03:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:03:09,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:09,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:09,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:03:09,631 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1554670212, now seen corresponding path program 1 times [2021-12-17 21:03:09,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:09,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540431151] [2021-12-17 21:03:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:09,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:09,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:09,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:03:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:09,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:03:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:09,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:03:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:09,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:03:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:09,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:09,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540431151] [2021-12-17 21:03:09,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540431151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:09,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:09,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:09,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458624833] [2021-12-17 21:03:09,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:09,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:09,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:09,710 INFO L87 Difference]: Start difference. First operand 7709 states and 11919 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:12,334 INFO L93 Difference]: Finished difference Result 29391 states and 45844 transitions. [2021-12-17 21:03:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:03:12,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:03:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:12,398 INFO L225 Difference]: With dead ends: 29391 [2021-12-17 21:03:12,399 INFO L226 Difference]: Without dead ends: 21698 [2021-12-17 21:03:12,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:03:12,478 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 1055 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:12,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1068 Valid, 1396 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1904 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:03:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21698 states. [2021-12-17 21:03:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21698 to 15184. [2021-12-17 21:03:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15184 states, 13748 states have (on average 1.5251672970613908) internal successors, (20968), 13813 states have internal predecessors, (20968), 981 states have call successors, (981), 390 states have call predecessors, (981), 454 states have return successors, (1774), 1044 states have call predecessors, (1774), 981 states have call successors, (1774) [2021-12-17 21:03:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15184 states to 15184 states and 23723 transitions. [2021-12-17 21:03:13,250 INFO L78 Accepts]: Start accepts. Automaton has 15184 states and 23723 transitions. Word has length 123 [2021-12-17 21:03:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:13,251 INFO L470 AbstractCegarLoop]: Abstraction has 15184 states and 23723 transitions. [2021-12-17 21:03:13,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:13,251 INFO L276 IsEmpty]: Start isEmpty. Operand 15184 states and 23723 transitions. [2021-12-17 21:03:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:03:13,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:13,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:13,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:03:13,259 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:13,260 INFO L85 PathProgramCache]: Analyzing trace with hash -64304702, now seen corresponding path program 1 times [2021-12-17 21:03:13,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:13,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322303272] [2021-12-17 21:03:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:13,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:13,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:13,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:03:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:13,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:03:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:13,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:03:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:13,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:03:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:13,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:13,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322303272] [2021-12-17 21:03:13,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322303272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:13,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:13,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:13,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767249903] [2021-12-17 21:03:13,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:13,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:13,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:13,351 INFO L87 Difference]: Start difference. First operand 15184 states and 23723 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:17,137 INFO L93 Difference]: Finished difference Result 56992 states and 89790 transitions. [2021-12-17 21:03:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:03:17,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:03:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:17,252 INFO L225 Difference]: With dead ends: 56992 [2021-12-17 21:03:17,252 INFO L226 Difference]: Without dead ends: 41824 [2021-12-17 21:03:17,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:03:17,284 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1094 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:17,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 1861 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:03:17,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41824 states. [2021-12-17 21:03:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41824 to 30097. [2021-12-17 21:03:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30097 states, 27317 states have (on average 1.5267415894864005) internal successors, (41706), 27446 states have internal predecessors, (41706), 1877 states have call successors, (1877), 774 states have call predecessors, (1877), 902 states have return successors, (4192), 2004 states have call predecessors, (4192), 1877 states have call successors, (4192) [2021-12-17 21:03:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30097 states to 30097 states and 47775 transitions. [2021-12-17 21:03:18,889 INFO L78 Accepts]: Start accepts. Automaton has 30097 states and 47775 transitions. Word has length 123 [2021-12-17 21:03:18,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:18,889 INFO L470 AbstractCegarLoop]: Abstraction has 30097 states and 47775 transitions. [2021-12-17 21:03:18,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand 30097 states and 47775 transitions. [2021-12-17 21:03:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:03:18,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:18,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:18,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:03:18,907 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:18,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:18,907 INFO L85 PathProgramCache]: Analyzing trace with hash -947813692, now seen corresponding path program 1 times [2021-12-17 21:03:18,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:18,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032301444] [2021-12-17 21:03:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:18,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:03:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:03:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:03:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:03:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:18,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:18,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032301444] [2021-12-17 21:03:18,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032301444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:18,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:18,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:18,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923227328] [2021-12-17 21:03:18,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:18,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:18,996 INFO L87 Difference]: Start difference. First operand 30097 states and 47775 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:25,036 INFO L93 Difference]: Finished difference Result 111007 states and 177732 transitions. [2021-12-17 21:03:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:03:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:03:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:25,345 INFO L225 Difference]: With dead ends: 111007 [2021-12-17 21:03:25,345 INFO L226 Difference]: Without dead ends: 80926 [2021-12-17 21:03:25,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:03:25,432 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 1054 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:25,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 1856 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:03:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80926 states. [2021-12-17 21:03:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80926 to 59858. [2021-12-17 21:03:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59858 states, 54454 states have (on average 1.5287031255738788) internal successors, (83244), 54711 states have internal predecessors, (83244), 3605 states have call successors, (3605), 1542 states have call predecessors, (3605), 1798 states have return successors, (10422), 3860 states have call predecessors, (10422), 3605 states have call successors, (10422) [2021-12-17 21:03:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59858 states to 59858 states and 97271 transitions. [2021-12-17 21:03:29,331 INFO L78 Accepts]: Start accepts. Automaton has 59858 states and 97271 transitions. Word has length 123 [2021-12-17 21:03:29,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:29,331 INFO L470 AbstractCegarLoop]: Abstraction has 59858 states and 97271 transitions. [2021-12-17 21:03:29,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:29,331 INFO L276 IsEmpty]: Start isEmpty. Operand 59858 states and 97271 transitions. [2021-12-17 21:03:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:03:29,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:29,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:29,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 21:03:29,364 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:29,364 INFO L85 PathProgramCache]: Analyzing trace with hash -976313982, now seen corresponding path program 1 times [2021-12-17 21:03:29,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:29,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3569987] [2021-12-17 21:03:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:29,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:29,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:29,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:03:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:29,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 21:03:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:29,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 21:03:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:29,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:03:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:29,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:29,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3569987] [2021-12-17 21:03:29,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3569987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:29,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:29,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:29,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194799084] [2021-12-17 21:03:29,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:29,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:29,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:29,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:29,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:29,580 INFO L87 Difference]: Start difference. First operand 59858 states and 97271 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:03:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:39,851 INFO L93 Difference]: Finished difference Result 216670 states and 355674 transitions. [2021-12-17 21:03:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:03:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-17 21:03:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:40,405 INFO L225 Difference]: With dead ends: 216670 [2021-12-17 21:03:40,405 INFO L226 Difference]: Without dead ends: 156828 [2021-12-17 21:03:40,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:03:40,534 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 970 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:40,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1879 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:03:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156828 states.