./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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.11.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 ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:44:50,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:44:50,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:44:50,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:44:50,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:44:50,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:44:50,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:44:50,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:44:50,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:44:50,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:44:50,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:44:50,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:44:50,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:44:50,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:44:50,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:44:50,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:44:50,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:44:50,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:44:50,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:44:50,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:44:50,319 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:44:50,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:44:50,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:44:50,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:44:50,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:44:50,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:44:50,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:44:50,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:44:50,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:44:50,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:44:50,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:44:50,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:44:50,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:44:50,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:44:50,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:44:50,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:44:50,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:44:50,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:44:50,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:44:50,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:44:50,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:44:50,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:44:50,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:44:50,350 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:44:50,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:44:50,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:44:50,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:44:50,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:44:50,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:44:50,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:44:50,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:44:50,353 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:44:50,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:44:50,354 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:44:50,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:44:50,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:44:50,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:44:50,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:44:50,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:44:50,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:44:50,355 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:44:50,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:44:50,355 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:44:50,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:44:50,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:44:50,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:44:50,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:44:50,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:44:50,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:44:50,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:44:50,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:44:50,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:44:50,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:44:50,357 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:44:50,357 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:44:50,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:44:50,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 [2022-07-22 20:44:50,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:44:50,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:44:50,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:44:50,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:44:50,561 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:44:50,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2022-07-22 20:44:50,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a2e8fc28/d08cab033bc54c21ba9373e0e724f21c/FLAG4e6d86ee8 [2022-07-22 20:44:50,999 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:44:50,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2022-07-22 20:44:51,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a2e8fc28/d08cab033bc54c21ba9373e0e724f21c/FLAG4e6d86ee8 [2022-07-22 20:44:51,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a2e8fc28/d08cab033bc54c21ba9373e0e724f21c [2022-07-22 20:44:51,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:44:51,051 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:44:51,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:44:51,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:44:51,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:44:51,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622d013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51, skipping insertion in model container [2022-07-22 20:44:51,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:44:51,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:44:51,271 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.11.cil-1.c[913,926] [2022-07-22 20:44:51,319 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.11.cil-1.c[5977,5990] [2022-07-22 20:44:51,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:44:51,427 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:44:51,438 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.11.cil-1.c[913,926] [2022-07-22 20:44:51,456 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.11.cil-1.c[5977,5990] [2022-07-22 20:44:51,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:44:51,500 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:44:51,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51 WrapperNode [2022-07-22 20:44:51,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:44:51,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:44:51,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:44:51,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:44:51,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,568 INFO L137 Inliner]: procedures = 70, calls = 82, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 1002 [2022-07-22 20:44:51,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:44:51,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:44:51,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:44:51,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:44:51,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:44:51,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:44:51,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:44:51,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:44:51,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (1/1) ... [2022-07-22 20:44:51,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:44:51,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:44:51,661 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) [2022-07-22 20:44:51,679 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 [2022-07-22 20:44:51,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:44:51,702 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-22 20:44:51,702 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-22 20:44:51,702 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-22 20:44:51,702 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-22 20:44:51,703 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-22 20:44:51,703 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-22 20:44:51,703 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-22 20:44:51,703 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-22 20:44:51,703 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-22 20:44:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-22 20:44:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-22 20:44:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-22 20:44:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-22 20:44:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-22 20:44:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:44:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-22 20:44:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-22 20:44:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:44:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:44:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-22 20:44:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-22 20:44:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-22 20:44:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-22 20:44:51,806 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:44:51,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:44:52,480 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:44:52,491 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:44:52,492 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2022-07-22 20:44:52,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:44:52 BoogieIcfgContainer [2022-07-22 20:44:52,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:44:52,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:44:52,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:44:52,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:44:52,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:44:51" (1/3) ... [2022-07-22 20:44:52,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f85275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:44:52, skipping insertion in model container [2022-07-22 20:44:52,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:44:51" (2/3) ... [2022-07-22 20:44:52,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f85275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:44:52, skipping insertion in model container [2022-07-22 20:44:52,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:44:52" (3/3) ... [2022-07-22 20:44:52,500 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2022-07-22 20:44:52,509 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:44:52,510 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:44:52,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:44:52,573 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@119d3fe0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78842cfa [2022-07-22 20:44:52,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:44:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 391 states have (on average 1.649616368286445) internal successors, (645), 398 states have internal predecessors, (645), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 20:44:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 20:44:52,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:52,589 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:44:52,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:52,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1248240687, now seen corresponding path program 1 times [2022-07-22 20:44:52,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:52,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958579766] [2022-07-22 20:44:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:52,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:52,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:44:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:52,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 20:44:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:44:52,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:52,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958579766] [2022-07-22 20:44:52,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958579766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:52,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:44:52,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:44:52,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232593188] [2022-07-22 20:44:52,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:52,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:44:52,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:52,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:44:52,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:44:52,832 INFO L87 Difference]: Start difference. First operand has 437 states, 391 states have (on average 1.649616368286445) internal successors, (645), 398 states have internal predecessors, (645), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) 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) [2022-07-22 20:44:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:53,089 INFO L93 Difference]: Finished difference Result 919 states and 1492 transitions. [2022-07-22 20:44:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:44:53,091 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 [2022-07-22 20:44:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:53,105 INFO L225 Difference]: With dead ends: 919 [2022-07-22 20:44:53,105 INFO L226 Difference]: Without dead ends: 496 [2022-07-22 20:44:53,111 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:44:53,114 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 897 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:53,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1082 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:44:53,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-07-22 20:44:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 490. [2022-07-22 20:44:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 440 states have (on average 1.5318181818181817) internal successors, (674), 445 states have internal predecessors, (674), 37 states have call successors, (37), 12 states have call predecessors, (37), 11 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2022-07-22 20:44:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 750 transitions. [2022-07-22 20:44:53,204 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 750 transitions. Word has length 44 [2022-07-22 20:44:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:53,205 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 750 transitions. [2022-07-22 20:44:53,205 INFO L496 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) [2022-07-22 20:44:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 750 transitions. [2022-07-22 20:44:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 20:44:53,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:53,209 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:44:53,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:44:53,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:53,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:53,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1131267963, now seen corresponding path program 1 times [2022-07-22 20:44:53,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:53,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869299398] [2022-07-22 20:44:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:53,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:53,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:44:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:53,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 20:44:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:44:53,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:53,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869299398] [2022-07-22 20:44:53,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869299398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:53,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:44:53,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:44:53,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773944079] [2022-07-22 20:44:53,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:53,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:44:53,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:44:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:44:53,296 INFO L87 Difference]: Start difference. First operand 490 states and 750 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) [2022-07-22 20:44:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:53,660 INFO L93 Difference]: Finished difference Result 738 states and 1090 transitions. [2022-07-22 20:44:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:44:53,663 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 [2022-07-22 20:44:53,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:53,666 INFO L225 Difference]: With dead ends: 738 [2022-07-22 20:44:53,666 INFO L226 Difference]: Without dead ends: 614 [2022-07-22 20:44:53,667 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:44:53,668 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 349 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:53,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 1400 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:44:53,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-07-22 20:44:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 557. [2022-07-22 20:44:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 501 states have (on average 1.5129740518962076) internal successors, (758), 506 states have internal predecessors, (758), 40 states have call successors, (40), 15 states have call predecessors, (40), 14 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2022-07-22 20:44:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 840 transitions. [2022-07-22 20:44:53,710 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 840 transitions. Word has length 45 [2022-07-22 20:44:53,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:53,711 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 840 transitions. [2022-07-22 20:44:53,711 INFO L496 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) [2022-07-22 20:44:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 840 transitions. [2022-07-22 20:44:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 20:44:53,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:53,716 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:44:53,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:44:53,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1879341872, now seen corresponding path program 1 times [2022-07-22 20:44:53,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:53,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185845567] [2022-07-22 20:44:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:53,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:53,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:44:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:53,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 20:44:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:44:53,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:53,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185845567] [2022-07-22 20:44:53,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185845567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:53,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:44:53,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:44:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952645912] [2022-07-22 20:44:53,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:44:53,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:44:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:44:53,781 INFO L87 Difference]: Start difference. First operand 557 states and 840 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) [2022-07-22 20:44:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:53,905 INFO L93 Difference]: Finished difference Result 965 states and 1399 transitions. [2022-07-22 20:44:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:44:53,906 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 [2022-07-22 20:44:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:53,909 INFO L225 Difference]: With dead ends: 965 [2022-07-22 20:44:53,909 INFO L226 Difference]: Without dead ends: 774 [2022-07-22 20:44:53,910 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:44:53,911 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 906 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:53,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 1083 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:44:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-07-22 20:44:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 722. [2022-07-22 20:44:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 647 states have (on average 1.465224111282844) internal successors, (948), 655 states have internal predecessors, (948), 51 states have call successors, (51), 22 states have call predecessors, (51), 22 states have return successors, (59), 45 states have call predecessors, (59), 47 states have call successors, (59) [2022-07-22 20:44:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1058 transitions. [2022-07-22 20:44:53,933 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1058 transitions. Word has length 45 [2022-07-22 20:44:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:53,933 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 1058 transitions. [2022-07-22 20:44:53,934 INFO L496 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) [2022-07-22 20:44:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1058 transitions. [2022-07-22 20:44:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 20:44:53,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:53,935 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:44:53,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 20:44:53,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:53,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:53,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2075143713, now seen corresponding path program 1 times [2022-07-22 20:44:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:53,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047164282] [2022-07-22 20:44:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:53,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:44:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:53,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:44:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:53,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 20:44:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 20:44:53,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:53,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047164282] [2022-07-22 20:44:53,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047164282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:53,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:44:53,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:44:53,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336292627] [2022-07-22 20:44:53,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:53,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:44:53,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:53,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:44:53,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:44:53,979 INFO L87 Difference]: Start difference. First operand 722 states and 1058 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) [2022-07-22 20:44:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:54,295 INFO L93 Difference]: Finished difference Result 1306 states and 1843 transitions. [2022-07-22 20:44:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:44:54,295 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 [2022-07-22 20:44:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:54,300 INFO L225 Difference]: With dead ends: 1306 [2022-07-22 20:44:54,300 INFO L226 Difference]: Without dead ends: 950 [2022-07-22 20:44:54,301 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:44:54,308 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 333 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:54,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1455 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:44:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-07-22 20:44:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 912. [2022-07-22 20:44:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 813 states have (on average 1.4120541205412054) internal successors, (1148), 823 states have internal predecessors, (1148), 65 states have call successors, (65), 30 states have call predecessors, (65), 32 states have return successors, (83), 59 states have call predecessors, (83), 61 states have call successors, (83) [2022-07-22 20:44:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1296 transitions. [2022-07-22 20:44:54,346 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1296 transitions. Word has length 62 [2022-07-22 20:44:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:54,346 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1296 transitions. [2022-07-22 20:44:54,346 INFO L496 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) [2022-07-22 20:44:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1296 transitions. [2022-07-22 20:44:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 20:44:54,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:54,348 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:44:54,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 20:44:54,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1252852542, now seen corresponding path program 1 times [2022-07-22 20:44:54,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:54,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637111093] [2022-07-22 20:44:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:54,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:54,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:44:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:54,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 20:44:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:54,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:44:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 20:44:54,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:54,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637111093] [2022-07-22 20:44:54,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637111093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:54,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:44:54,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:44:54,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962758076] [2022-07-22 20:44:54,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:54,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:44:54,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:54,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:44:54,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:44:54,415 INFO L87 Difference]: Start difference. First operand 912 states and 1296 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) [2022-07-22 20:44:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:54,530 INFO L93 Difference]: Finished difference Result 1565 states and 2149 transitions. [2022-07-22 20:44:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:44:54,531 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 [2022-07-22 20:44:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:54,536 INFO L225 Difference]: With dead ends: 1565 [2022-07-22 20:44:54,537 INFO L226 Difference]: Without dead ends: 1111 [2022-07-22 20:44:54,538 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:44:54,539 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 893 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:54,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 1080 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:44:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-07-22 20:44:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1056. [2022-07-22 20:44:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 941 states have (on average 1.3804463336875665) internal successors, (1299), 953 states have internal predecessors, (1299), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (97), 67 states have call predecessors, (97), 69 states have call successors, (97) [2022-07-22 20:44:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1469 transitions. [2022-07-22 20:44:54,577 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1469 transitions. Word has length 67 [2022-07-22 20:44:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:54,577 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 1469 transitions. [2022-07-22 20:44:54,577 INFO L496 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) [2022-07-22 20:44:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1469 transitions. [2022-07-22 20:44:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 20:44:54,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:54,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:44:54,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 20:44:54,579 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:54,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1281985013, now seen corresponding path program 1 times [2022-07-22 20:44:54,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:54,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251156246] [2022-07-22 20:44:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:54,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:54,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:44:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:54,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:44:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:54,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:44:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 20:44:54,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:54,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251156246] [2022-07-22 20:44:54,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251156246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:44:54,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925416096] [2022-07-22 20:44:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:54,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:54,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:44:54,662 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) [2022-07-22 20:44:54,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 20:44:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:54,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 20:44:54,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:44:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:44:54,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:44:54,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925416096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:54,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:44:54,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 20:44:54,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063167467] [2022-07-22 20:44:54,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:54,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:44:54,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:54,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:44:54,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:44:54,822 INFO L87 Difference]: Start difference. First operand 1056 states and 1469 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 20:44:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:54,873 INFO L93 Difference]: Finished difference Result 1599 states and 2192 transitions. [2022-07-22 20:44:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:44:54,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-07-22 20:44:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:54,877 INFO L225 Difference]: With dead ends: 1599 [2022-07-22 20:44:54,878 INFO L226 Difference]: Without dead ends: 1054 [2022-07-22 20:44:54,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:44:54,880 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 72 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:54,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1340 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:44:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-07-22 20:44:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1010. [2022-07-22 20:44:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 901 states have (on average 1.3695893451720311) internal successors, (1234), 913 states have internal predecessors, (1234), 69 states have call successors, (69), 34 states have call predecessors, (69), 38 states have return successors, (91), 63 states have call predecessors, (91), 65 states have call successors, (91) [2022-07-22 20:44:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1394 transitions. [2022-07-22 20:44:54,917 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1394 transitions. Word has length 68 [2022-07-22 20:44:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:54,917 INFO L495 AbstractCegarLoop]: Abstraction has 1010 states and 1394 transitions. [2022-07-22 20:44:54,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 20:44:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1394 transitions. [2022-07-22 20:44:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 20:44:54,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:54,919 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:44:54,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 20:44:55,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 20:44:55,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash 897986762, now seen corresponding path program 1 times [2022-07-22 20:44:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973973519] [2022-07-22 20:44:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:55,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:55,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:44:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:55,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:44:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:55,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:44:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:44:55,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973973519] [2022-07-22 20:44:55,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973973519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:44:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181568551] [2022-07-22 20:44:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:55,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:55,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:44:55,212 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) [2022-07-22 20:44:55,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 20:44:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:55,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 20:44:55,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:44:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:44:55,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:44:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 20:44:55,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181568551] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 20:44:55,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:44:55,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-22 20:44:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19029083] [2022-07-22 20:44:55,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:55,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:44:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:44:55,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:44:55,421 INFO L87 Difference]: Start difference. First operand 1010 states and 1394 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) [2022-07-22 20:44:55,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:55,533 INFO L93 Difference]: Finished difference Result 1062 states and 1456 transitions. [2022-07-22 20:44:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 20:44:55,534 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 [2022-07-22 20:44:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:55,538 INFO L225 Difference]: With dead ends: 1062 [2022-07-22 20:44:55,538 INFO L226 Difference]: Without dead ends: 1059 [2022-07-22 20:44:55,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:44:55,539 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 1197 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:55,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1197 Valid, 746 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:44:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-07-22 20:44:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1009. [2022-07-22 20:44:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 901 states have (on average 1.367369589345172) internal successors, (1232), 912 states have internal predecessors, (1232), 68 states have call successors, (68), 34 states have call predecessors, (68), 38 states have return successors, (91), 63 states have call predecessors, (91), 65 states have call successors, (91) [2022-07-22 20:44:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1391 transitions. [2022-07-22 20:44:55,566 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1391 transitions. Word has length 68 [2022-07-22 20:44:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:55,567 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1391 transitions. [2022-07-22 20:44:55,567 INFO L496 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) [2022-07-22 20:44:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1391 transitions. [2022-07-22 20:44:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 20:44:55,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:55,569 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:44:55,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 20:44:55,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-22 20:44:55,788 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:55,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2066438309, now seen corresponding path program 1 times [2022-07-22 20:44:55,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:55,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926358007] [2022-07-22 20:44:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:55,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:44:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:55,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:44:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:55,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:44:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:44:55,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:55,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926358007] [2022-07-22 20:44:55,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926358007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:44:55,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445288300] [2022-07-22 20:44:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:55,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:55,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:44:55,848 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) [2022-07-22 20:44:55,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 20:44:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 20:44:55,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:44:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:44:56,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:44:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 20:44:56,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445288300] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:44:56,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:44:56,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-22 20:44:56,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204662282] [2022-07-22 20:44:56,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:44:56,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 20:44:56,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:56,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 20:44:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:44:56,170 INFO L87 Difference]: Start difference. First operand 1009 states and 1391 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) [2022-07-22 20:44:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:57,355 INFO L93 Difference]: Finished difference Result 2519 states and 3329 transitions. [2022-07-22 20:44:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 20:44:57,355 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 [2022-07-22 20:44:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:57,363 INFO L225 Difference]: With dead ends: 2519 [2022-07-22 20:44:57,363 INFO L226 Difference]: Without dead ends: 2023 [2022-07-22 20:44:57,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 20:44:57,366 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 1813 mSDsluCounter, 2786 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:57,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1845 Valid, 3568 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1823 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:44:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-07-22 20:44:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1388. [2022-07-22 20:44:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1241 states have (on average 1.3247381144238517) internal successors, (1644), 1260 states have internal predecessors, (1644), 88 states have call successors, (88), 48 states have call predecessors, (88), 57 states have return successors, (125), 80 states have call predecessors, (125), 85 states have call successors, (125) [2022-07-22 20:44:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1857 transitions. [2022-07-22 20:44:57,421 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1857 transitions. Word has length 69 [2022-07-22 20:44:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:57,422 INFO L495 AbstractCegarLoop]: Abstraction has 1388 states and 1857 transitions. [2022-07-22 20:44:57,422 INFO L496 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) [2022-07-22 20:44:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1857 transitions. [2022-07-22 20:44:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 20:44:57,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:57,425 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:44:57,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 20:44:57,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:57,639 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1048564289, now seen corresponding path program 1 times [2022-07-22 20:44:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:57,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77300397] [2022-07-22 20:44:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:57,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:57,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:44:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:57,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:44:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:57,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 20:44:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:57,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 20:44:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 20:44:57,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:57,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77300397] [2022-07-22 20:44:57,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77300397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:44:57,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543002440] [2022-07-22 20:44:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:57,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:57,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:44:57,707 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) [2022-07-22 20:44:57,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 20:44:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:57,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 20:44:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:44:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 20:44:57,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:44:57,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543002440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:57,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:44:57,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 20:44:57,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718254924] [2022-07-22 20:44:57,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:57,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:44:57,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:57,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:44:57,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:44:57,851 INFO L87 Difference]: Start difference. First operand 1388 states and 1857 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) [2022-07-22 20:44:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:57,892 INFO L93 Difference]: Finished difference Result 2079 states and 2732 transitions. [2022-07-22 20:44:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:44:57,892 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 [2022-07-22 20:44:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:57,896 INFO L225 Difference]: With dead ends: 2079 [2022-07-22 20:44:57,896 INFO L226 Difference]: Without dead ends: 1310 [2022-07-22 20:44:57,898 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:44:57,898 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 617 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 761 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 [2022-07-22 20:44:57,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 761 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:44:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-07-22 20:44:57,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1301. [2022-07-22 20:44:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1164 states have (on average 1.3230240549828178) internal successors, (1540), 1182 states have internal predecessors, (1540), 84 states have call successors, (84), 44 states have call predecessors, (84), 51 states have return successors, (117), 75 states have call predecessors, (117), 81 states have call successors, (117) [2022-07-22 20:44:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1741 transitions. [2022-07-22 20:44:57,958 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1741 transitions. Word has length 88 [2022-07-22 20:44:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:57,958 INFO L495 AbstractCegarLoop]: Abstraction has 1301 states and 1741 transitions. [2022-07-22 20:44:57,958 INFO L496 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) [2022-07-22 20:44:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1741 transitions. [2022-07-22 20:44:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 20:44:57,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:57,960 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:44:57,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 20:44:58,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:58,175 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash -55924099, now seen corresponding path program 1 times [2022-07-22 20:44:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:58,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010473567] [2022-07-22 20:44:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:58,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:44:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:44:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:44:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 20:44:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-22 20:44:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 20:44:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:58,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010473567] [2022-07-22 20:44:58,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010473567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:44:58,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628313153] [2022-07-22 20:44:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:58,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:44:58,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:44:58,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 20:44:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:44:58,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:44:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:44:58,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:44:58,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628313153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:58,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:44:58,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 20:44:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555172236] [2022-07-22 20:44:58,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:58,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:44:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:44:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:44:58,335 INFO L87 Difference]: Start difference. First operand 1301 states and 1741 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) [2022-07-22 20:44:58,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:58,369 INFO L93 Difference]: Finished difference Result 1678 states and 2202 transitions. [2022-07-22 20:44:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:44:58,369 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 [2022-07-22 20:44:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:58,371 INFO L225 Difference]: With dead ends: 1678 [2022-07-22 20:44:58,371 INFO L226 Difference]: Without dead ends: 360 [2022-07-22 20:44:58,373 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:44:58,373 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 61 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1335 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 [2022-07-22 20:44:58,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1335 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:44:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-22 20:44:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-07-22 20:44:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5797546012269938) internal successors, (515), 328 states have internal predecessors, (515), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-22 20:44:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 567 transitions. [2022-07-22 20:44:58,382 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 567 transitions. Word has length 103 [2022-07-22 20:44:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:58,382 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 567 transitions. [2022-07-22 20:44:58,383 INFO L496 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) [2022-07-22 20:44:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 567 transitions. [2022-07-22 20:44:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:44:58,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:58,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:44:58,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 20:44:58,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 20:44:58,600 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1801318745, now seen corresponding path program 1 times [2022-07-22 20:44:58,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628011694] [2022-07-22 20:44:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:44:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:44:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:44:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:44:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:44:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:44:58,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:58,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628011694] [2022-07-22 20:44:58,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628011694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:58,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:44:58,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:44:58,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780731566] [2022-07-22 20:44:58,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:58,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:44:58,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:44:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:44:58,702 INFO L87 Difference]: Start difference. First operand 360 states and 567 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:44:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:59,690 INFO L93 Difference]: Finished difference Result 841 states and 1345 transitions. [2022-07-22 20:44:59,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:44:59,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:44:59,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:59,693 INFO L225 Difference]: With dead ends: 841 [2022-07-22 20:44:59,693 INFO L226 Difference]: Without dead ends: 491 [2022-07-22 20:44:59,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:44:59,694 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 966 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:59,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 1007 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:44:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-22 20:44:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 360. [2022-07-22 20:44:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5766871165644172) internal successors, (514), 328 states have internal predecessors, (514), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-22 20:44:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 566 transitions. [2022-07-22 20:44:59,712 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 566 transitions. Word has length 168 [2022-07-22 20:44:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:59,712 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 566 transitions. [2022-07-22 20:44:59,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:44:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 566 transitions. [2022-07-22 20:44:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:44:59,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:59,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:44:59,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 20:44:59,714 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:59,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2146146907, now seen corresponding path program 1 times [2022-07-22 20:44:59,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:59,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970384121] [2022-07-22 20:44:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:59,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:59,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:44:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:59,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:44:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:59,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:44:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:59,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:44:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:59,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:44:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:44:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:59,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970384121] [2022-07-22 20:44:59,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970384121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:59,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:44:59,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:44:59,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138586453] [2022-07-22 20:44:59,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:44:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:44:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:44:59,795 INFO L87 Difference]: Start difference. First operand 360 states and 566 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:00,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:00,787 INFO L93 Difference]: Finished difference Result 833 states and 1328 transitions. [2022-07-22 20:45:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:45:00,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:00,790 INFO L225 Difference]: With dead ends: 833 [2022-07-22 20:45:00,790 INFO L226 Difference]: Without dead ends: 491 [2022-07-22 20:45:00,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:45:00,791 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 957 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:00,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1005 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:45:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-22 20:45:00,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 360. [2022-07-22 20:45:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5736196319018405) internal successors, (513), 328 states have internal predecessors, (513), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-22 20:45:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 565 transitions. [2022-07-22 20:45:00,809 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 565 transitions. Word has length 168 [2022-07-22 20:45:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:00,810 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 565 transitions. [2022-07-22 20:45:00,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 565 transitions. [2022-07-22 20:45:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:00,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:00,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:00,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 20:45:00,811 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:00,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1762957987, now seen corresponding path program 1 times [2022-07-22 20:45:00,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:00,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416799629] [2022-07-22 20:45:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:00,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:00,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:00,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:00,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:00,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:00,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:00,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:00,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416799629] [2022-07-22 20:45:00,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416799629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:00,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:00,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:45:00,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952452157] [2022-07-22 20:45:00,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:00,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:45:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:45:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:45:00,913 INFO L87 Difference]: Start difference. First operand 360 states and 565 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:02,844 INFO L93 Difference]: Finished difference Result 1318 states and 2116 transitions. [2022-07-22 20:45:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:45:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:02,848 INFO L225 Difference]: With dead ends: 1318 [2022-07-22 20:45:02,848 INFO L226 Difference]: Without dead ends: 978 [2022-07-22 20:45:02,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:02,849 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 1456 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:02,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1474 Valid, 1588 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1869 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 20:45:02,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-07-22 20:45:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 715. [2022-07-22 20:45:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 654 states have (on average 1.5871559633027523) internal successors, (1038), 657 states have internal predecessors, (1038), 47 states have call successors, (47), 13 states have call predecessors, (47), 13 states have return successors, (48), 45 states have call predecessors, (48), 45 states have call successors, (48) [2022-07-22 20:45:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1133 transitions. [2022-07-22 20:45:02,887 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1133 transitions. Word has length 168 [2022-07-22 20:45:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:02,887 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 1133 transitions. [2022-07-22 20:45:02,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1133 transitions. [2022-07-22 20:45:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:02,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:02,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:02,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 20:45:02,889 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:02,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1609608801, now seen corresponding path program 1 times [2022-07-22 20:45:02,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:02,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293133300] [2022-07-22 20:45:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:02,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:02,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:02,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:02,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:02,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:02,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:02,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293133300] [2022-07-22 20:45:02,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293133300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:02,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:02,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:02,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236110360] [2022-07-22 20:45:02,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:02,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:02,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:02,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:02,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:02,992 INFO L87 Difference]: Start difference. First operand 715 states and 1133 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:05,446 INFO L93 Difference]: Finished difference Result 2178 states and 3507 transitions. [2022-07-22 20:45:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:45:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:05,459 INFO L225 Difference]: With dead ends: 2178 [2022-07-22 20:45:05,459 INFO L226 Difference]: Without dead ends: 1483 [2022-07-22 20:45:05,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:45:05,461 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 1483 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:05,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1501 Valid, 2783 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 20:45:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2022-07-22 20:45:05,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1046. [2022-07-22 20:45:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 958 states have (on average 1.581419624217119) internal successors, (1515), 962 states have internal predecessors, (1515), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2022-07-22 20:45:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1652 transitions. [2022-07-22 20:45:05,520 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1652 transitions. Word has length 168 [2022-07-22 20:45:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:05,520 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 1652 transitions. [2022-07-22 20:45:05,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1652 transitions. [2022-07-22 20:45:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:05,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:05,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:05,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 20:45:05,521 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1271321251, now seen corresponding path program 1 times [2022-07-22 20:45:05,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:05,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384183119] [2022-07-22 20:45:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:05,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:05,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:05,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384183119] [2022-07-22 20:45:05,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384183119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:05,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:05,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:05,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043634532] [2022-07-22 20:45:05,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:05,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:05,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:05,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:05,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:05,617 INFO L87 Difference]: Start difference. First operand 1046 states and 1652 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:06,864 INFO L93 Difference]: Finished difference Result 2523 states and 4060 transitions. [2022-07-22 20:45:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:06,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:06,869 INFO L225 Difference]: With dead ends: 2523 [2022-07-22 20:45:06,869 INFO L226 Difference]: Without dead ends: 1497 [2022-07-22 20:45:06,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:06,873 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 1050 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:06,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 1513 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:45:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-07-22 20:45:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1046. [2022-07-22 20:45:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 958 states have (on average 1.5782881002087683) internal successors, (1512), 962 states have internal predecessors, (1512), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2022-07-22 20:45:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1649 transitions. [2022-07-22 20:45:06,937 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1649 transitions. Word has length 168 [2022-07-22 20:45:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:06,937 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 1649 transitions. [2022-07-22 20:45:06,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1649 transitions. [2022-07-22 20:45:06,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:06,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:06,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:06,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 20:45:06,939 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:06,939 INFO L85 PathProgramCache]: Analyzing trace with hash -844766753, now seen corresponding path program 1 times [2022-07-22 20:45:06,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:06,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482759624] [2022-07-22 20:45:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:06,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:06,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:06,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:07,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:07,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:07,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:07,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:07,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482759624] [2022-07-22 20:45:07,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482759624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:07,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:07,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:07,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369340742] [2022-07-22 20:45:07,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:07,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:07,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:07,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:07,041 INFO L87 Difference]: Start difference. First operand 1046 states and 1649 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:08,128 INFO L93 Difference]: Finished difference Result 2519 states and 4043 transitions. [2022-07-22 20:45:08,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:08,133 INFO L225 Difference]: With dead ends: 2519 [2022-07-22 20:45:08,133 INFO L226 Difference]: Without dead ends: 1493 [2022-07-22 20:45:08,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:08,136 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 1281 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:08,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1300 Valid, 1279 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:45:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2022-07-22 20:45:08,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1046. [2022-07-22 20:45:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 958 states have (on average 1.5751565762004176) internal successors, (1509), 962 states have internal predecessors, (1509), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2022-07-22 20:45:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1646 transitions. [2022-07-22 20:45:08,210 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1646 transitions. Word has length 168 [2022-07-22 20:45:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:08,211 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 1646 transitions. [2022-07-22 20:45:08,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1646 transitions. [2022-07-22 20:45:08,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:08,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:08,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:08,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 20:45:08,213 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:08,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1385196259, now seen corresponding path program 1 times [2022-07-22 20:45:08,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:08,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042976546] [2022-07-22 20:45:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:08,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:08,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:08,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042976546] [2022-07-22 20:45:08,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042976546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:08,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:08,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:08,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126078781] [2022-07-22 20:45:08,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:08,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:08,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:08,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:08,315 INFO L87 Difference]: Start difference. First operand 1046 states and 1646 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:10,793 INFO L93 Difference]: Finished difference Result 3436 states and 5490 transitions. [2022-07-22 20:45:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:45:10,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:10,802 INFO L225 Difference]: With dead ends: 3436 [2022-07-22 20:45:10,803 INFO L226 Difference]: Without dead ends: 2410 [2022-07-22 20:45:10,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:45:10,805 INFO L413 NwaCegarLoop]: 936 mSDtfsCounter, 1465 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 2857 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 2764 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:10,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1483 Valid, 2764 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2857 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 20:45:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2022-07-22 20:45:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1717. [2022-07-22 20:45:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1575 states have (on average 1.5695238095238095) internal successors, (2472), 1581 states have internal predecessors, (2472), 107 states have call successors, (107), 31 states have call predecessors, (107), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2022-07-22 20:45:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2697 transitions. [2022-07-22 20:45:10,899 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2697 transitions. Word has length 168 [2022-07-22 20:45:10,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:10,899 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 2697 transitions. [2022-07-22 20:45:10,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2697 transitions. [2022-07-22 20:45:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:10,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:10,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:10,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 20:45:10,902 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:10,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:10,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1541176801, now seen corresponding path program 1 times [2022-07-22 20:45:10,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:10,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390041106] [2022-07-22 20:45:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:10,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:10,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:11,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:11,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:11,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390041106] [2022-07-22 20:45:11,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390041106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:11,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:11,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:11,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653569212] [2022-07-22 20:45:11,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:11,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:11,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:11,007 INFO L87 Difference]: Start difference. First operand 1717 states and 2697 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:12,238 INFO L93 Difference]: Finished difference Result 4093 states and 6528 transitions. [2022-07-22 20:45:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:12,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:12,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:12,246 INFO L225 Difference]: With dead ends: 4093 [2022-07-22 20:45:12,246 INFO L226 Difference]: Without dead ends: 2396 [2022-07-22 20:45:12,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:12,250 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 1047 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:12,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1066 Valid, 1502 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:45:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2022-07-22 20:45:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1717. [2022-07-22 20:45:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1575 states have (on average 1.5663492063492064) internal successors, (2467), 1581 states have internal predecessors, (2467), 107 states have call successors, (107), 31 states have call predecessors, (107), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2022-07-22 20:45:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2692 transitions. [2022-07-22 20:45:12,356 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2692 transitions. Word has length 168 [2022-07-22 20:45:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:12,356 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 2692 transitions. [2022-07-22 20:45:12,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2692 transitions. [2022-07-22 20:45:12,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:12,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:12,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:12,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 20:45:12,359 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1130566435, now seen corresponding path program 1 times [2022-07-22 20:45:12,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:12,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206072521] [2022-07-22 20:45:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:12,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:12,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:12,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206072521] [2022-07-22 20:45:12,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206072521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:12,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:12,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:12,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25841469] [2022-07-22 20:45:12,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:12,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:12,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:12,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:12,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:12,473 INFO L87 Difference]: Start difference. First operand 1717 states and 2692 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:14,974 INFO L93 Difference]: Finished difference Result 5875 states and 9325 transitions. [2022-07-22 20:45:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:45:14,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:14,985 INFO L225 Difference]: With dead ends: 5875 [2022-07-22 20:45:14,986 INFO L226 Difference]: Without dead ends: 4178 [2022-07-22 20:45:14,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:45:14,989 INFO L413 NwaCegarLoop]: 925 mSDtfsCounter, 1457 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 2830 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 2753 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:14,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1475 Valid, 2753 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2830 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 20:45:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2022-07-22 20:45:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3063. [2022-07-22 20:45:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.560966939210807) internal successors, (4391), 2823 states have internal predecessors, (4391), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2022-07-22 20:45:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4798 transitions. [2022-07-22 20:45:15,179 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4798 transitions. Word has length 168 [2022-07-22 20:45:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:15,180 INFO L495 AbstractCegarLoop]: Abstraction has 3063 states and 4798 transitions. [2022-07-22 20:45:15,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4798 transitions. [2022-07-22 20:45:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:15,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:15,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:15,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 20:45:15,182 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:15,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:15,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1376531039, now seen corresponding path program 1 times [2022-07-22 20:45:15,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:15,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90989651] [2022-07-22 20:45:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:15,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:15,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:15,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90989651] [2022-07-22 20:45:15,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90989651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:15,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:15,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:15,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093789481] [2022-07-22 20:45:15,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:15,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:15,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:15,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:15,291 INFO L87 Difference]: Start difference. First operand 3063 states and 4798 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:16,518 INFO L93 Difference]: Finished difference Result 7237 states and 11491 transitions. [2022-07-22 20:45:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:16,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:16,531 INFO L225 Difference]: With dead ends: 7237 [2022-07-22 20:45:16,531 INFO L226 Difference]: Without dead ends: 4194 [2022-07-22 20:45:16,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:16,537 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 1204 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:16,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 1303 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:45:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2022-07-22 20:45:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 3063. [2022-07-22 20:45:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.557767507998578) internal successors, (4382), 2823 states have internal predecessors, (4382), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2022-07-22 20:45:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4789 transitions. [2022-07-22 20:45:16,773 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4789 transitions. Word has length 168 [2022-07-22 20:45:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:16,773 INFO L495 AbstractCegarLoop]: Abstraction has 3063 states and 4789 transitions. [2022-07-22 20:45:16,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4789 transitions. [2022-07-22 20:45:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:16,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:16,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:16,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 20:45:16,776 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:16,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:16,777 INFO L85 PathProgramCache]: Analyzing trace with hash -759352163, now seen corresponding path program 1 times [2022-07-22 20:45:16,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:16,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224451544] [2022-07-22 20:45:16,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:16,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:16,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:16,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:16,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:16,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:16,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:16,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:16,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224451544] [2022-07-22 20:45:16,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224451544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:16,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:16,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:16,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013645111] [2022-07-22 20:45:16,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:16,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:16,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:16,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:16,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:16,887 INFO L87 Difference]: Start difference. First operand 3063 states and 4789 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:18,306 INFO L93 Difference]: Finished difference Result 7217 states and 11424 transitions. [2022-07-22 20:45:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:18,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:18,317 INFO L225 Difference]: With dead ends: 7217 [2022-07-22 20:45:18,317 INFO L226 Difference]: Without dead ends: 4174 [2022-07-22 20:45:18,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:18,325 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 1045 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:18,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 1487 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:45:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4174 states. [2022-07-22 20:45:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4174 to 3063. [2022-07-22 20:45:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.554568076786349) internal successors, (4373), 2823 states have internal predecessors, (4373), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2022-07-22 20:45:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4780 transitions. [2022-07-22 20:45:18,557 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4780 transitions. Word has length 168 [2022-07-22 20:45:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:18,557 INFO L495 AbstractCegarLoop]: Abstraction has 3063 states and 4780 transitions. [2022-07-22 20:45:18,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4780 transitions. [2022-07-22 20:45:18,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:18,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:18,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:18,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 20:45:18,560 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash -341463461, now seen corresponding path program 1 times [2022-07-22 20:45:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:18,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669785885] [2022-07-22 20:45:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:18,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:18,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:18,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669785885] [2022-07-22 20:45:18,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669785885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:18,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:18,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:18,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512887455] [2022-07-22 20:45:18,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:18,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:18,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:18,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:18,674 INFO L87 Difference]: Start difference. First operand 3063 states and 4780 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:20,154 INFO L93 Difference]: Finished difference Result 7207 states and 11377 transitions. [2022-07-22 20:45:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:20,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:20,164 INFO L225 Difference]: With dead ends: 7207 [2022-07-22 20:45:20,165 INFO L226 Difference]: Without dead ends: 4164 [2022-07-22 20:45:20,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:20,171 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 1043 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:20,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1062 Valid, 1483 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:45:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2022-07-22 20:45:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 3063. [2022-07-22 20:45:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.5513686455741202) internal successors, (4364), 2823 states have internal predecessors, (4364), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2022-07-22 20:45:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4771 transitions. [2022-07-22 20:45:20,403 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4771 transitions. Word has length 168 [2022-07-22 20:45:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:20,403 INFO L495 AbstractCegarLoop]: Abstraction has 3063 states and 4771 transitions. [2022-07-22 20:45:20,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4771 transitions. [2022-07-22 20:45:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:20,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:20,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:20,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 20:45:20,406 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:20,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1057490141, now seen corresponding path program 1 times [2022-07-22 20:45:20,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:20,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357820351] [2022-07-22 20:45:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:20,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:20,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:20,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:20,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:20,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:20,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357820351] [2022-07-22 20:45:20,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357820351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:20,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:20,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:20,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495074605] [2022-07-22 20:45:20,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:20,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:20,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:20,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:20,493 INFO L87 Difference]: Start difference. First operand 3063 states and 4771 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:21,904 INFO L93 Difference]: Finished difference Result 7197 states and 11330 transitions. [2022-07-22 20:45:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:21,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:21,913 INFO L225 Difference]: With dead ends: 7197 [2022-07-22 20:45:21,913 INFO L226 Difference]: Without dead ends: 4154 [2022-07-22 20:45:21,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:21,919 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 1085 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:21,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1104 Valid, 1453 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:45:21,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2022-07-22 20:45:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3063. [2022-07-22 20:45:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.5481692143618913) internal successors, (4355), 2823 states have internal predecessors, (4355), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2022-07-22 20:45:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4762 transitions. [2022-07-22 20:45:22,144 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4762 transitions. Word has length 168 [2022-07-22 20:45:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:22,144 INFO L495 AbstractCegarLoop]: Abstraction has 3063 states and 4762 transitions. [2022-07-22 20:45:22,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4762 transitions. [2022-07-22 20:45:22,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:22,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:22,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:22,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 20:45:22,146 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:22,146 INFO L85 PathProgramCache]: Analyzing trace with hash -559950309, now seen corresponding path program 1 times [2022-07-22 20:45:22,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:22,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845379726] [2022-07-22 20:45:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:22,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:22,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:22,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845379726] [2022-07-22 20:45:22,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845379726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:22,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:22,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:22,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641964429] [2022-07-22 20:45:22,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:22,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:22,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:22,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:22,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:22,239 INFO L87 Difference]: Start difference. First operand 3063 states and 4762 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:25,885 INFO L93 Difference]: Finished difference Result 11921 states and 18647 transitions. [2022-07-22 20:45:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:45:25,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:25,904 INFO L225 Difference]: With dead ends: 11921 [2022-07-22 20:45:25,905 INFO L226 Difference]: Without dead ends: 8878 [2022-07-22 20:45:25,912 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:45:25,913 INFO L413 NwaCegarLoop]: 1059 mSDtfsCounter, 1529 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 3229 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 2876 SdHoareTripleChecker+Invalid, 3320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:25,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1546 Valid, 2876 Invalid, 3320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3229 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 20:45:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8878 states. [2022-07-22 20:45:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8878 to 5701. [2022-07-22 20:45:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5701 states, 5243 states have (on average 1.5401487697882892) internal successors, (8075), 5261 states have internal predecessors, (8075), 339 states have call successors, (339), 103 states have call predecessors, (339), 118 states have return successors, (434), 352 states have call predecessors, (434), 337 states have call successors, (434) [2022-07-22 20:45:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 8848 transitions. [2022-07-22 20:45:26,440 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 8848 transitions. Word has length 168 [2022-07-22 20:45:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:26,440 INFO L495 AbstractCegarLoop]: Abstraction has 5701 states and 8848 transitions. [2022-07-22 20:45:26,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 8848 transitions. [2022-07-22 20:45:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:26,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:26,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:26,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 20:45:26,443 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash -196483811, now seen corresponding path program 1 times [2022-07-22 20:45:26,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:26,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153063649] [2022-07-22 20:45:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:26,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:26,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153063649] [2022-07-22 20:45:26,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153063649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:26,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:26,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757390153] [2022-07-22 20:45:26,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:26,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:26,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:26,529 INFO L87 Difference]: Start difference. First operand 5701 states and 8848 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:30,962 INFO L93 Difference]: Finished difference Result 22389 states and 34987 transitions. [2022-07-22 20:45:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:45:30,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:31,001 INFO L225 Difference]: With dead ends: 22389 [2022-07-22 20:45:31,002 INFO L226 Difference]: Without dead ends: 16708 [2022-07-22 20:45:31,056 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:45:31,056 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 1795 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1825 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 2812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:31,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1825 Valid, 2703 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2718 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 20:45:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16708 states. [2022-07-22 20:45:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16708 to 11038. [2022-07-22 20:45:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11038 states, 10172 states have (on average 1.5380456154148643) internal successors, (15645), 10206 states have internal predecessors, (15645), 635 states have call successors, (635), 199 states have call predecessors, (635), 230 states have return successors, (908), 664 states have call predecessors, (908), 633 states have call successors, (908) [2022-07-22 20:45:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11038 states to 11038 states and 17188 transitions. [2022-07-22 20:45:32,051 INFO L78 Accepts]: Start accepts. Automaton has 11038 states and 17188 transitions. Word has length 168 [2022-07-22 20:45:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:32,052 INFO L495 AbstractCegarLoop]: Abstraction has 11038 states and 17188 transitions. [2022-07-22 20:45:32,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 11038 states and 17188 transitions. [2022-07-22 20:45:32,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:32,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:32,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:32,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 20:45:32,057 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:32,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash 92335579, now seen corresponding path program 1 times [2022-07-22 20:45:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:32,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914315702] [2022-07-22 20:45:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:32,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:32,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:32,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:32,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:32,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:32,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914315702] [2022-07-22 20:45:32,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914315702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:32,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:32,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:32,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158502532] [2022-07-22 20:45:32,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:32,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:32,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:32,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:32,146 INFO L87 Difference]: Start difference. First operand 11038 states and 17188 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:39,075 INFO L93 Difference]: Finished difference Result 43244 states and 67809 transitions. [2022-07-22 20:45:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:45:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:39,155 INFO L225 Difference]: With dead ends: 43244 [2022-07-22 20:45:39,155 INFO L226 Difference]: Without dead ends: 32226 [2022-07-22 20:45:39,183 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:45:39,183 INFO L413 NwaCegarLoop]: 1018 mSDtfsCounter, 1508 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 2838 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:39,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1525 Valid, 2838 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3144 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 20:45:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32226 states. [2022-07-22 20:45:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32226 to 21695. [2022-07-22 20:45:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21695 states, 20029 states have (on average 1.5377203055569424) internal successors, (30799), 20095 states have internal predecessors, (30799), 1211 states have call successors, (1211), 391 states have call predecessors, (1211), 454 states have return successors, (2002), 1272 states have call predecessors, (2002), 1209 states have call successors, (2002) [2022-07-22 20:45:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21695 states to 21695 states and 34012 transitions. [2022-07-22 20:45:41,302 INFO L78 Accepts]: Start accepts. Automaton has 21695 states and 34012 transitions. Word has length 168 [2022-07-22 20:45:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:41,303 INFO L495 AbstractCegarLoop]: Abstraction has 21695 states and 34012 transitions. [2022-07-22 20:45:41,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 21695 states and 34012 transitions. [2022-07-22 20:45:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:41,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:41,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:41,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 20:45:41,312 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash -452536995, now seen corresponding path program 1 times [2022-07-22 20:45:41,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:41,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677086854] [2022-07-22 20:45:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:41,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:41,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:41,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677086854] [2022-07-22 20:45:41,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677086854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:41,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:41,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:41,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712408763] [2022-07-22 20:45:41,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:41,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:41,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:41,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:41,413 INFO L87 Difference]: Start difference. First operand 21695 states and 34012 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:52,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:52,824 INFO L93 Difference]: Finished difference Result 84363 states and 133159 transitions. [2022-07-22 20:45:52,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:45:52,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:45:52,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:53,055 INFO L225 Difference]: With dead ends: 84363 [2022-07-22 20:45:53,055 INFO L226 Difference]: Without dead ends: 62688 [2022-07-22 20:45:53,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:45:53,128 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 1718 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 2699 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1748 SdHoareTripleChecker+Valid, 2691 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:53,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1748 Valid, 2691 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2699 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 20:45:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62688 states. [2022-07-22 20:45:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62688 to 42976. [2022-07-22 20:45:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42976 states, 39742 states have (on average 1.5383473403452268) internal successors, (61137), 39872 states have internal predecessors, (61137), 2331 states have call successors, (2331), 775 states have call predecessors, (2331), 902 states have return successors, (4644), 2456 states have call predecessors, (4644), 2329 states have call successors, (4644) [2022-07-22 20:45:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42976 states to 42976 states and 68112 transitions. [2022-07-22 20:45:57,632 INFO L78 Accepts]: Start accepts. Automaton has 42976 states and 68112 transitions. Word has length 168 [2022-07-22 20:45:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:57,632 INFO L495 AbstractCegarLoop]: Abstraction has 42976 states and 68112 transitions. [2022-07-22 20:45:57,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:45:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 42976 states and 68112 transitions. [2022-07-22 20:45:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:45:57,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:57,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:45:57,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 20:45:57,647 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash 222623131, now seen corresponding path program 1 times [2022-07-22 20:45:57,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:57,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399081599] [2022-07-22 20:45:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:57,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:57,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:45:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:57,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:57,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:45:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:57,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:45:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:57,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:57,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399081599] [2022-07-22 20:45:57,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399081599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:57,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:57,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:57,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997160601] [2022-07-22 20:45:57,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:57,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:57,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:57,731 INFO L87 Difference]: Start difference. First operand 42976 states and 68112 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:46:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:46:17,371 INFO L93 Difference]: Finished difference Result 163496 states and 261097 transitions. [2022-07-22 20:46:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:46:17,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:46:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:46:17,766 INFO L225 Difference]: With dead ends: 163496 [2022-07-22 20:46:17,766 INFO L226 Difference]: Without dead ends: 120540 [2022-07-22 20:46:17,884 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:46:17,885 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 1475 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 3010 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:46:17,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 2774 Invalid, 3104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3010 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 20:46:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120540 states. [2022-07-22 20:46:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120540 to 85602. [2022-07-22 20:46:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85602 states, 79296 states have (on average 1.5402164043583535) internal successors, (122133), 79554 states have internal predecessors, (122133), 4507 states have call successors, (4507), 1543 states have call predecessors, (4507), 1798 states have return successors, (11322), 4760 states have call predecessors, (11322), 4505 states have call successors, (11322) [2022-07-22 20:46:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85602 states to 85602 states and 137962 transitions. [2022-07-22 20:46:27,023 INFO L78 Accepts]: Start accepts. Automaton has 85602 states and 137962 transitions. Word has length 168 [2022-07-22 20:46:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:46:27,024 INFO L495 AbstractCegarLoop]: Abstraction has 85602 states and 137962 transitions. [2022-07-22 20:46:27,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:46:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 85602 states and 137962 transitions. [2022-07-22 20:46:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:46:27,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:46:27,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:46:27,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 20:46:27,051 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:46:27,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:46:27,052 INFO L85 PathProgramCache]: Analyzing trace with hash -362148519, now seen corresponding path program 1 times [2022-07-22 20:46:27,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:46:27,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740557233] [2022-07-22 20:46:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:46:27,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:46:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:27,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:46:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:27,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:46:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:27,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:46:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:27,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:46:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:27,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:46:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:46:27,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:46:27,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740557233] [2022-07-22 20:46:27,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740557233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:46:27,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:46:27,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:46:27,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361024724] [2022-07-22 20:46:27,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:46:27,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:46:27,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:46:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:46:27,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:46:27,141 INFO L87 Difference]: Start difference. First operand 85602 states and 137962 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:47:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:47:05,044 INFO L93 Difference]: Finished difference Result 321448 states and 522113 transitions. [2022-07-22 20:47:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:47:05,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 168 [2022-07-22 20:47:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:47:05,934 INFO L225 Difference]: With dead ends: 321448 [2022-07-22 20:47:05,934 INFO L226 Difference]: Without dead ends: 235866 [2022-07-22 20:47:06,144 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:47:06,144 INFO L413 NwaCegarLoop]: 857 mSDtfsCounter, 1595 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 2673 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 2677 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:47:06,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1625 Valid, 2677 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2673 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 20:47:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235866 states. [2022-07-22 20:47:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235866 to 170723. [2022-07-22 20:47:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170723 states, 158401 states have (on average 1.5419536492825172) internal successors, (244247), 158915 states have internal predecessors, (244247), 8731 states have call successors, (8731), 3079 states have call predecessors, (8731), 3590 states have return successors, (28924), 9240 states have call predecessors, (28924), 8729 states have call successors, (28924) [2022-07-22 20:47:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170723 states to 170723 states and 281902 transitions. [2022-07-22 20:47:25,715 INFO L78 Accepts]: Start accepts. Automaton has 170723 states and 281902 transitions. Word has length 168 [2022-07-22 20:47:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:47:25,715 INFO L495 AbstractCegarLoop]: Abstraction has 170723 states and 281902 transitions. [2022-07-22 20:47:25,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:47:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 170723 states and 281902 transitions. [2022-07-22 20:47:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 20:47:25,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:47:25,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:47:25,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 20:47:25,772 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:47:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:47:25,772 INFO L85 PathProgramCache]: Analyzing trace with hash -796654117, now seen corresponding path program 1 times [2022-07-22 20:47:25,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:47:25,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53724401] [2022-07-22 20:47:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:47:25,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:47:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:25,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:47:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:25,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 20:47:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:25,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:47:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:25,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:47:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:25,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 20:47:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:47:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:47:25,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:47:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53724401] [2022-07-22 20:47:25,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53724401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:47:25,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:47:25,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:47:25,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381131598] [2022-07-22 20:47:25,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:47:25,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:47:25,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:47:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:47:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:47:25,862 INFO L87 Difference]: Start difference. First operand 170723 states and 281902 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)