./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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.04.cil-2.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 c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 20:28:59,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 20:28:59,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 20:28:59,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 20:28:59,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 20:28:59,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 20:28:59,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 20:28:59,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 20:28:59,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 20:28:59,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 20:28:59,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 20:28:59,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 20:28:59,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 20:28:59,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 20:28:59,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 20:28:59,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 20:28:59,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 20:28:59,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 20:28:59,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 20:28:59,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 20:28:59,579 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 20:28:59,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 20:28:59,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 20:28:59,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 20:28:59,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 20:28:59,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 20:28:59,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 20:28:59,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 20:28:59,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 20:28:59,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 20:28:59,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 20:28:59,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 20:28:59,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 20:28:59,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 20:28:59,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 20:28:59,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 20:28:59,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 20:28:59,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 20:28:59,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 20:28:59,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 20:28:59,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 20:28:59,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 20:28:59,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 20:28:59,605 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 20:28:59,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 20:28:59,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 20:28:59,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 20:28:59,606 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 20:28:59,606 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 20:28:59,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 20:28:59,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 20:28:59,607 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 20:28:59,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 20:28:59,608 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 20:28:59,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 20:28:59,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 20:28:59,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 20:28:59,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 20:28:59,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 20:28:59,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 20:28:59,609 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 20:28:59,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 20:28:59,609 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 20:28:59,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 20:28:59,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 20:28:59,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 20:28:59,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 20:28:59,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:28:59,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 20:28:59,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 20:28:59,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 20:28:59,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 20:28:59,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 20:28:59,610 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 20:28:59,611 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 20:28:59,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 20:28:59,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be [2022-07-19 20:28:59,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 20:28:59,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 20:28:59,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 20:28:59,835 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 20:28:59,851 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 20:28:59,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-07-19 20:28:59,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/194b034a6/e0f5343b75804243bfe907d7dde3ba72/FLAG7cd68a666 [2022-07-19 20:29:00,231 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 20:29:00,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-07-19 20:29:00,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/194b034a6/e0f5343b75804243bfe907d7dde3ba72/FLAG7cd68a666 [2022-07-19 20:29:00,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/194b034a6/e0f5343b75804243bfe907d7dde3ba72 [2022-07-19 20:29:00,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 20:29:00,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 20:29:00,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 20:29:00,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 20:29:00,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 20:29:00,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db2a223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00, skipping insertion in model container [2022-07-19 20:29:00,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 20:29:00,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 20:29:00,391 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.04.cil-2.c[913,926] [2022-07-19 20:29:00,439 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.04.cil-2.c[5977,5990] [2022-07-19 20:29:00,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:29:00,499 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 20:29:00,509 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.04.cil-2.c[913,926] [2022-07-19 20:29:00,531 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.04.cil-2.c[5977,5990] [2022-07-19 20:29:00,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:29:00,591 INFO L208 MainTranslator]: Completed translation [2022-07-19 20:29:00,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00 WrapperNode [2022-07-19 20:29:00,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 20:29:00,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 20:29:00,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 20:29:00,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 20:29:00,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,656 INFO L137 Inliner]: procedures = 56, calls = 61, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 596 [2022-07-19 20:29:00,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 20:29:00,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 20:29:00,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 20:29:00,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 20:29:00,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 20:29:00,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 20:29:00,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 20:29:00,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 20:29:00,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (1/1) ... [2022-07-19 20:29:00,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:29:00,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:00,780 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) [2022-07-19 20:29:00,806 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 [2022-07-19 20:29:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 20:29:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-19 20:29:00,822 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-19 20:29:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-19 20:29:00,822 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-19 20:29:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-19 20:29:00,822 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-19 20:29:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-19 20:29:00,822 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-19 20:29:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-19 20:29:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-19 20:29:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-19 20:29:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-19 20:29:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-19 20:29:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-19 20:29:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 20:29:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-19 20:29:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-19 20:29:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 20:29:00,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 20:29:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-19 20:29:00,824 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-19 20:29:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-19 20:29:00,824 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-19 20:29:00,942 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 20:29:00,943 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 20:29:01,269 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 20:29:01,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 20:29:01,276 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-19 20:29:01,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:29:01 BoogieIcfgContainer [2022-07-19 20:29:01,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 20:29:01,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 20:29:01,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 20:29:01,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 20:29:01,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:29:00" (1/3) ... [2022-07-19 20:29:01,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1554b36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:29:01, skipping insertion in model container [2022-07-19 20:29:01,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:00" (2/3) ... [2022-07-19 20:29:01,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1554b36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:29:01, skipping insertion in model container [2022-07-19 20:29:01,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:29:01" (3/3) ... [2022-07-19 20:29:01,285 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-07-19 20:29:01,295 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 20:29:01,295 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 20:29:01,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:29:01,344 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@8a5deb1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b64626b [2022-07-19 20:29:01,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:29:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 230 states have internal predecessors, (358), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-19 20:29:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 20:29:01,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:01,357 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] [2022-07-19 20:29:01,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:01,361 INFO L85 PathProgramCache]: Analyzing trace with hash -994911012, now seen corresponding path program 1 times [2022-07-19 20:29:01,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:01,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230373299] [2022-07-19 20:29:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:01,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:01,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:01,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 20:29:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:01,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:01,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230373299] [2022-07-19 20:29:01,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230373299] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:01,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:01,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:01,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413101765] [2022-07-19 20:29:01,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:01,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:01,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:01,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:01,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:01,577 INFO L87 Difference]: Start difference. First operand has 262 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 230 states have internal predecessors, (358), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) 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) [2022-07-19 20:29:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:01,826 INFO L93 Difference]: Finished difference Result 576 states and 904 transitions. [2022-07-19 20:29:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:01,829 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 [2022-07-19 20:29:01,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:01,837 INFO L225 Difference]: With dead ends: 576 [2022-07-19 20:29:01,837 INFO L226 Difference]: Without dead ends: 321 [2022-07-19 20:29:01,840 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 [2022-07-19 20:29:01,858 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 477 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:01,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 669 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-19 20:29:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 315. [2022-07-19 20:29:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 272 states have (on average 1.474264705882353) internal successors, (401), 277 states have internal predecessors, (401), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (32), 26 states have call predecessors, (32), 26 states have call successors, (32) [2022-07-19 20:29:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 463 transitions. [2022-07-19 20:29:01,929 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 463 transitions. Word has length 44 [2022-07-19 20:29:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:01,930 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 463 transitions. [2022-07-19 20:29:01,930 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) [2022-07-19 20:29:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 463 transitions. [2022-07-19 20:29:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 20:29:01,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:01,932 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] [2022-07-19 20:29:01,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 20:29:01,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash -983625859, now seen corresponding path program 1 times [2022-07-19 20:29:01,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:01,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981874914] [2022-07-19 20:29:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:01,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:01,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:01,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 20:29:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:02,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:02,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981874914] [2022-07-19 20:29:02,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981874914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:02,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:02,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:02,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792240209] [2022-07-19 20:29:02,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:02,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:02,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:02,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:02,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:02,019 INFO L87 Difference]: Start difference. First operand 315 states and 463 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) [2022-07-19 20:29:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:02,220 INFO L93 Difference]: Finished difference Result 563 states and 803 transitions. [2022-07-19 20:29:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:02,220 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 [2022-07-19 20:29:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:02,223 INFO L225 Difference]: With dead ends: 563 [2022-07-19 20:29:02,223 INFO L226 Difference]: Without dead ends: 439 [2022-07-19 20:29:02,224 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 [2022-07-19 20:29:02,225 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 209 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:02,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 840 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 20:29:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-19 20:29:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 382. [2022-07-19 20:29:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 333 states have (on average 1.4564564564564564) internal successors, (485), 338 states have internal predecessors, (485), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (35), 29 states have call predecessors, (35), 29 states have call successors, (35) [2022-07-19 20:29:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 553 transitions. [2022-07-19 20:29:02,259 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 553 transitions. Word has length 45 [2022-07-19 20:29:02,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:02,259 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 553 transitions. [2022-07-19 20:29:02,259 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) [2022-07-19 20:29:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 553 transitions. [2022-07-19 20:29:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 20:29:02,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:02,261 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] [2022-07-19 20:29:02,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 20:29:02,262 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:02,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2026983976, now seen corresponding path program 1 times [2022-07-19 20:29:02,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:02,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607004235] [2022-07-19 20:29:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:02,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 20:29:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:02,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:02,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607004235] [2022-07-19 20:29:02,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607004235] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:02,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:02,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:02,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026910110] [2022-07-19 20:29:02,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:02,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:02,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:02,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:02,364 INFO L87 Difference]: Start difference. First operand 382 states and 553 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) [2022-07-19 20:29:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:02,494 INFO L93 Difference]: Finished difference Result 790 states and 1112 transitions. [2022-07-19 20:29:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:02,494 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 [2022-07-19 20:29:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:02,498 INFO L225 Difference]: With dead ends: 790 [2022-07-19 20:29:02,498 INFO L226 Difference]: Without dead ends: 599 [2022-07-19 20:29:02,498 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 [2022-07-19 20:29:02,499 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 486 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:02,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 663 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-07-19 20:29:02,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 547. [2022-07-19 20:29:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 479 states have (on average 1.4091858037578289) internal successors, (675), 487 states have internal predecessors, (675), 44 states have call successors, (44), 22 states have call predecessors, (44), 22 states have return successors, (52), 38 states have call predecessors, (52), 40 states have call successors, (52) [2022-07-19 20:29:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 771 transitions. [2022-07-19 20:29:02,547 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 771 transitions. Word has length 45 [2022-07-19 20:29:02,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:02,547 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 771 transitions. [2022-07-19 20:29:02,548 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) [2022-07-19 20:29:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 771 transitions. [2022-07-19 20:29:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 20:29:02,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:02,551 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] [2022-07-19 20:29:02,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 20:29:02,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash -89185588, now seen corresponding path program 1 times [2022-07-19 20:29:02,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:02,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289112848] [2022-07-19 20:29:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:02,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 20:29:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 20:29:02,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:02,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289112848] [2022-07-19 20:29:02,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289112848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:02,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:02,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:02,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756743944] [2022-07-19 20:29:02,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:02,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:02,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:02,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:02,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:02,628 INFO L87 Difference]: Start difference. First operand 547 states and 771 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) [2022-07-19 20:29:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:02,880 INFO L93 Difference]: Finished difference Result 1131 states and 1556 transitions. [2022-07-19 20:29:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:02,881 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 [2022-07-19 20:29:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:02,884 INFO L225 Difference]: With dead ends: 1131 [2022-07-19 20:29:02,885 INFO L226 Difference]: Without dead ends: 775 [2022-07-19 20:29:02,886 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 [2022-07-19 20:29:02,886 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 193 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:02,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 895 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 20:29:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-07-19 20:29:02,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 737. [2022-07-19 20:29:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 645 states have (on average 1.3565891472868217) internal successors, (875), 655 states have internal predecessors, (875), 58 states have call successors, (58), 30 states have call predecessors, (58), 32 states have return successors, (76), 52 states have call predecessors, (76), 54 states have call successors, (76) [2022-07-19 20:29:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1009 transitions. [2022-07-19 20:29:02,913 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1009 transitions. Word has length 62 [2022-07-19 20:29:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:02,914 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 1009 transitions. [2022-07-19 20:29:02,914 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) [2022-07-19 20:29:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1009 transitions. [2022-07-19 20:29:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 20:29:02,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:02,917 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] [2022-07-19 20:29:02,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 20:29:02,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash 613039140, now seen corresponding path program 1 times [2022-07-19 20:29:02,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:02,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684999828] [2022-07-19 20:29:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:02,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 20:29:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 20:29:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 20:29:02,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:02,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684999828] [2022-07-19 20:29:02,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684999828] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:02,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:02,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:02,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451226260] [2022-07-19 20:29:02,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:02,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:02,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:02,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:02,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:02,956 INFO L87 Difference]: Start difference. First operand 737 states and 1009 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) [2022-07-19 20:29:03,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:03,060 INFO L93 Difference]: Finished difference Result 1390 states and 1862 transitions. [2022-07-19 20:29:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:03,061 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 [2022-07-19 20:29:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:03,064 INFO L225 Difference]: With dead ends: 1390 [2022-07-19 20:29:03,065 INFO L226 Difference]: Without dead ends: 936 [2022-07-19 20:29:03,066 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 [2022-07-19 20:29:03,067 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 473 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:03,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 660 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-07-19 20:29:03,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 881. [2022-07-19 20:29:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 773 states have (on average 1.3272962483829236) internal successors, (1026), 785 states have internal predecessors, (1026), 66 states have call successors, (66), 36 states have call predecessors, (66), 40 states have return successors, (90), 60 states have call predecessors, (90), 62 states have call successors, (90) [2022-07-19 20:29:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1182 transitions. [2022-07-19 20:29:03,095 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1182 transitions. Word has length 67 [2022-07-19 20:29:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:03,095 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1182 transitions. [2022-07-19 20:29:03,095 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) [2022-07-19 20:29:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1182 transitions. [2022-07-19 20:29:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 20:29:03,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:03,097 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] [2022-07-19 20:29:03,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 20:29:03,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:03,098 INFO L85 PathProgramCache]: Analyzing trace with hash 250622658, now seen corresponding path program 1 times [2022-07-19 20:29:03,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:03,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713052620] [2022-07-19 20:29:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:03,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:29:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 20:29:03,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:03,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713052620] [2022-07-19 20:29:03,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713052620] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:03,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182794052] [2022-07-19 20:29:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:03,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:03,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:03,179 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) [2022-07-19 20:29:03,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 20:29:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 20:29:03,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:29:03,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:03,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182794052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:03,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:03,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 20:29:03,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866313747] [2022-07-19 20:29:03,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:03,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:03,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:03,299 INFO L87 Difference]: Start difference. First operand 881 states and 1182 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) [2022-07-19 20:29:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:03,326 INFO L93 Difference]: Finished difference Result 1424 states and 1905 transitions. [2022-07-19 20:29:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:03,326 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 [2022-07-19 20:29:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:03,329 INFO L225 Difference]: With dead ends: 1424 [2022-07-19 20:29:03,329 INFO L226 Difference]: Without dead ends: 879 [2022-07-19 20:29:03,331 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 [2022-07-19 20:29:03,331 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 72 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 766 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 [2022-07-19 20:29:03,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 766 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-07-19 20:29:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 835. [2022-07-19 20:29:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 733 states have (on average 1.311050477489768) internal successors, (961), 745 states have internal predecessors, (961), 62 states have call successors, (62), 34 states have call predecessors, (62), 38 states have return successors, (84), 56 states have call predecessors, (84), 58 states have call successors, (84) [2022-07-19 20:29:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1107 transitions. [2022-07-19 20:29:03,355 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1107 transitions. Word has length 68 [2022-07-19 20:29:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:03,356 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1107 transitions. [2022-07-19 20:29:03,356 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) [2022-07-19 20:29:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1107 transitions. [2022-07-19 20:29:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 20:29:03,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:03,358 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] [2022-07-19 20:29:03,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 20:29:03,575 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 [2022-07-19 20:29:03,576 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:03,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1864372863, now seen corresponding path program 1 times [2022-07-19 20:29:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196202426] [2022-07-19 20:29:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:03,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:29:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:29:03,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:03,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196202426] [2022-07-19 20:29:03,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196202426] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:03,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968909096] [2022-07-19 20:29:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:03,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:03,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:03,676 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) [2022-07-19 20:29:03,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 20:29:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 20:29:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:03,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:29:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:29:03,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968909096] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:03,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 20:29:03,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-19 20:29:03,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619306432] [2022-07-19 20:29:03,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:03,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:03,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:03,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:03,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:03,924 INFO L87 Difference]: Start difference. First operand 835 states and 1107 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) [2022-07-19 20:29:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:04,016 INFO L93 Difference]: Finished difference Result 887 states and 1169 transitions. [2022-07-19 20:29:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:29:04,016 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 [2022-07-19 20:29:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:04,022 INFO L225 Difference]: With dead ends: 887 [2022-07-19 20:29:04,022 INFO L226 Difference]: Without dead ends: 884 [2022-07-19 20:29:04,023 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 [2022-07-19 20:29:04,023 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 651 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:04,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 459 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-19 20:29:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 834. [2022-07-19 20:29:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 733 states have (on average 1.3083219645293316) internal successors, (959), 744 states have internal predecessors, (959), 61 states have call successors, (61), 34 states have call predecessors, (61), 38 states have return successors, (84), 56 states have call predecessors, (84), 58 states have call successors, (84) [2022-07-19 20:29:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1104 transitions. [2022-07-19 20:29:04,049 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1104 transitions. Word has length 68 [2022-07-19 20:29:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:04,049 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1104 transitions. [2022-07-19 20:29:04,049 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) [2022-07-19 20:29:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1104 transitions. [2022-07-19 20:29:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:29:04,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:04,051 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] [2022-07-19 20:29:04,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:04,281 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 [2022-07-19 20:29:04,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:04,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1961817817, now seen corresponding path program 1 times [2022-07-19 20:29:04,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:04,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887644346] [2022-07-19 20:29:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:04,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:04,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:04,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:04,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:29:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:29:04,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887644346] [2022-07-19 20:29:04,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887644346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514237816] [2022-07-19 20:29:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:04,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:04,363 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) [2022-07-19 20:29:04,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 20:29:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:04,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 20:29:04,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:04,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:29:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:29:04,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514237816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:29:04,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:29:04,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-19 20:29:04,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033096129] [2022-07-19 20:29:04,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:29:04,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 20:29:04,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 20:29:04,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:29:04,713 INFO L87 Difference]: Start difference. First operand 834 states and 1104 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) [2022-07-19 20:29:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:05,671 INFO L93 Difference]: Finished difference Result 2344 states and 3042 transitions. [2022-07-19 20:29:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 20:29:05,672 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 [2022-07-19 20:29:05,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:05,677 INFO L225 Difference]: With dead ends: 2344 [2022-07-19 20:29:05,678 INFO L226 Difference]: Without dead ends: 1848 [2022-07-19 20:29:05,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 20:29:05,680 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 1090 mSDsluCounter, 2038 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2533 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:05,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 2533 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 20:29:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-07-19 20:29:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1213. [2022-07-19 20:29:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1073 states have (on average 1.277726001863933) internal successors, (1371), 1092 states have internal predecessors, (1371), 81 states have call successors, (81), 48 states have call predecessors, (81), 57 states have return successors, (118), 73 states have call predecessors, (118), 78 states have call successors, (118) [2022-07-19 20:29:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1570 transitions. [2022-07-19 20:29:05,725 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1570 transitions. Word has length 69 [2022-07-19 20:29:05,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:05,725 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1570 transitions. [2022-07-19 20:29:05,725 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) [2022-07-19 20:29:05,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1570 transitions. [2022-07-19 20:29:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-19 20:29:05,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:05,728 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] [2022-07-19 20:29:05,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 20:29:05,943 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 [2022-07-19 20:29:05,943 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash 484677058, now seen corresponding path program 1 times [2022-07-19 20:29:05,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:05,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017030329] [2022-07-19 20:29:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:05,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:05,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:05,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 20:29:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-19 20:29:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 20:29:06,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:06,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017030329] [2022-07-19 20:29:06,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017030329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:06,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923057294] [2022-07-19 20:29:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:06,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:06,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:06,016 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) [2022-07-19 20:29:06,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 20:29:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 20:29:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:29:06,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:06,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923057294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:06,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:06,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 20:29:06,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29076301] [2022-07-19 20:29:06,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:06,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:06,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:06,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:06,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:06,167 INFO L87 Difference]: Start difference. First operand 1213 states and 1570 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) [2022-07-19 20:29:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:06,210 INFO L93 Difference]: Finished difference Result 1904 states and 2445 transitions. [2022-07-19 20:29:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:06,210 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 [2022-07-19 20:29:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:06,214 INFO L225 Difference]: With dead ends: 1904 [2022-07-19 20:29:06,214 INFO L226 Difference]: Without dead ends: 1135 [2022-07-19 20:29:06,215 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 [2022-07-19 20:29:06,217 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 330 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 474 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 [2022-07-19 20:29:06,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 474 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:06,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-07-19 20:29:06,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1126. [2022-07-19 20:29:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2720883534136547) internal successors, (1267), 1014 states have internal predecessors, (1267), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-19 20:29:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1454 transitions. [2022-07-19 20:29:06,258 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1454 transitions. Word has length 88 [2022-07-19 20:29:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:06,259 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1454 transitions. [2022-07-19 20:29:06,259 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) [2022-07-19 20:29:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1454 transitions. [2022-07-19 20:29:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:29:06,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:06,263 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] [2022-07-19 20:29:06,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:06,483 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 [2022-07-19 20:29:06,483 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:06,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:06,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1240141234, now seen corresponding path program 1 times [2022-07-19 20:29:06,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:06,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037666266] [2022-07-19 20:29:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:06,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037666266] [2022-07-19 20:29:06,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037666266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:06,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:06,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:29:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562735876] [2022-07-19 20:29:06,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:06,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:29:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:29:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:06,529 INFO L87 Difference]: Start difference. First operand 1126 states and 1454 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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) [2022-07-19 20:29:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:07,001 INFO L93 Difference]: Finished difference Result 1354 states and 1810 transitions. [2022-07-19 20:29:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:29:07,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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 91 [2022-07-19 20:29:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:07,005 INFO L225 Difference]: With dead ends: 1354 [2022-07-19 20:29:07,005 INFO L226 Difference]: Without dead ends: 1180 [2022-07-19 20:29:07,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:29:07,007 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 498 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:07,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 750 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 20:29:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-07-19 20:29:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1126. [2022-07-19 20:29:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2710843373493976) internal successors, (1266), 1014 states have internal predecessors, (1266), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-19 20:29:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1453 transitions. [2022-07-19 20:29:07,050 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1453 transitions. Word has length 91 [2022-07-19 20:29:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:07,050 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1453 transitions. [2022-07-19 20:29:07,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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) [2022-07-19 20:29:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1453 transitions. [2022-07-19 20:29:07,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:29:07,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:07,052 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] [2022-07-19 20:29:07,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 20:29:07,052 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:07,052 INFO L85 PathProgramCache]: Analyzing trace with hash 999901488, now seen corresponding path program 1 times [2022-07-19 20:29:07,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:07,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796668837] [2022-07-19 20:29:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:07,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:07,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:07,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796668837] [2022-07-19 20:29:07,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796668837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:07,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:07,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 20:29:07,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279303515] [2022-07-19 20:29:07,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:07,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:29:07,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:07,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:29:07,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:29:07,106 INFO L87 Difference]: Start difference. First operand 1126 states and 1453 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-19 20:29:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:07,663 INFO L93 Difference]: Finished difference Result 1351 states and 1806 transitions. [2022-07-19 20:29:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:29:07,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 91 [2022-07-19 20:29:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:07,667 INFO L225 Difference]: With dead ends: 1351 [2022-07-19 20:29:07,667 INFO L226 Difference]: Without dead ends: 1179 [2022-07-19 20:29:07,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:29:07,668 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 579 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:07,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 839 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 20:29:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-07-19 20:29:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1126. [2022-07-19 20:29:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2700803212851406) internal successors, (1265), 1014 states have internal predecessors, (1265), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-19 20:29:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1452 transitions. [2022-07-19 20:29:07,735 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1452 transitions. Word has length 91 [2022-07-19 20:29:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:07,735 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1452 transitions. [2022-07-19 20:29:07,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-19 20:29:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1452 transitions. [2022-07-19 20:29:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:29:07,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:07,737 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] [2022-07-19 20:29:07,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 20:29:07,738 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1077435410, now seen corresponding path program 1 times [2022-07-19 20:29:07,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:07,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713262496] [2022-07-19 20:29:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:07,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:07,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:07,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713262496] [2022-07-19 20:29:07,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713262496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:07,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:07,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:07,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541479519] [2022-07-19 20:29:07,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:07,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:07,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:07,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:07,800 INFO L87 Difference]: Start difference. First operand 1126 states and 1452 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-07-19 20:29:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:08,350 INFO L93 Difference]: Finished difference Result 1360 states and 1821 transitions. [2022-07-19 20:29:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:29:08,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-19 20:29:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:08,354 INFO L225 Difference]: With dead ends: 1360 [2022-07-19 20:29:08,355 INFO L226 Difference]: Without dead ends: 1188 [2022-07-19 20:29:08,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:29:08,356 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 711 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:08,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 877 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 20:29:08,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-07-19 20:29:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1126. [2022-07-19 20:29:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2690763052208835) internal successors, (1264), 1014 states have internal predecessors, (1264), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-19 20:29:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1451 transitions. [2022-07-19 20:29:08,423 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1451 transitions. Word has length 91 [2022-07-19 20:29:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:08,423 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1451 transitions. [2022-07-19 20:29:08,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-07-19 20:29:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1451 transitions. [2022-07-19 20:29:08,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:29:08,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:08,425 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] [2022-07-19 20:29:08,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 20:29:08,426 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:08,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:08,426 INFO L85 PathProgramCache]: Analyzing trace with hash -190212564, now seen corresponding path program 1 times [2022-07-19 20:29:08,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:08,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454685644] [2022-07-19 20:29:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:08,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:08,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:08,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454685644] [2022-07-19 20:29:08,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454685644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:08,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:08,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:08,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98161403] [2022-07-19 20:29:08,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:08,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:08,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:08,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:08,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:08,483 INFO L87 Difference]: Start difference. First operand 1126 states and 1451 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-07-19 20:29:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:09,018 INFO L93 Difference]: Finished difference Result 1359 states and 1816 transitions. [2022-07-19 20:29:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:29:09,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-19 20:29:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:09,022 INFO L225 Difference]: With dead ends: 1359 [2022-07-19 20:29:09,022 INFO L226 Difference]: Without dead ends: 1187 [2022-07-19 20:29:09,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:29:09,024 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 709 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:09,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 873 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 20:29:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2022-07-19 20:29:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1126. [2022-07-19 20:29:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2680722891566265) internal successors, (1263), 1014 states have internal predecessors, (1263), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-19 20:29:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1450 transitions. [2022-07-19 20:29:09,086 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1450 transitions. Word has length 91 [2022-07-19 20:29:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:09,086 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1450 transitions. [2022-07-19 20:29:09,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-07-19 20:29:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1450 transitions. [2022-07-19 20:29:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:29:09,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:09,088 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] [2022-07-19 20:29:09,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 20:29:09,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:09,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2101255122, now seen corresponding path program 1 times [2022-07-19 20:29:09,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:09,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000482742] [2022-07-19 20:29:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:09,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:09,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:09,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000482742] [2022-07-19 20:29:09,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000482742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:09,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:09,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 20:29:09,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635945716] [2022-07-19 20:29:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:09,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 20:29:09,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 20:29:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:09,152 INFO L87 Difference]: Start difference. First operand 1126 states and 1450 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-07-19 20:29:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:10,490 INFO L93 Difference]: Finished difference Result 1602 states and 2197 transitions. [2022-07-19 20:29:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 20:29:10,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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 91 [2022-07-19 20:29:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:10,496 INFO L225 Difference]: With dead ends: 1602 [2022-07-19 20:29:10,496 INFO L226 Difference]: Without dead ends: 1430 [2022-07-19 20:29:10,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-07-19 20:29:10,498 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 810 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:10,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 2043 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 20:29:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-07-19 20:29:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1314. [2022-07-19 20:29:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1160 states have (on average 1.306896551724138) internal successors, (1516), 1180 states have internal predecessors, (1516), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (133), 85 states have call predecessors, (133), 90 states have call successors, (133) [2022-07-19 20:29:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1742 transitions. [2022-07-19 20:29:10,558 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1742 transitions. Word has length 91 [2022-07-19 20:29:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:10,558 INFO L495 AbstractCegarLoop]: Abstraction has 1314 states and 1742 transitions. [2022-07-19 20:29:10,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-07-19 20:29:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1742 transitions. [2022-07-19 20:29:10,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:29:10,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:10,560 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] [2022-07-19 20:29:10,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 20:29:10,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:10,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2024354324, now seen corresponding path program 1 times [2022-07-19 20:29:10,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:10,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73259920] [2022-07-19 20:29:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:10,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:10,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:10,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73259920] [2022-07-19 20:29:10,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73259920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:10,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:10,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 20:29:10,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505107656] [2022-07-19 20:29:10,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:10,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 20:29:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 20:29:10,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:10,656 INFO L87 Difference]: Start difference. First operand 1314 states and 1742 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-07-19 20:29:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:11,909 INFO L93 Difference]: Finished difference Result 2378 states and 3404 transitions. [2022-07-19 20:29:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 20:29:11,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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 91 [2022-07-19 20:29:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:11,916 INFO L225 Difference]: With dead ends: 2378 [2022-07-19 20:29:11,916 INFO L226 Difference]: Without dead ends: 2020 [2022-07-19 20:29:11,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-19 20:29:11,917 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 988 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:11,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 1903 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 20:29:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2022-07-19 20:29:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1666. [2022-07-19 20:29:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1470 states have (on average 1.35578231292517) internal successors, (1993), 1494 states have internal predecessors, (1993), 119 states have call successors, (119), 62 states have call predecessors, (119), 75 states have return successors, (175), 113 states have call predecessors, (175), 116 states have call successors, (175) [2022-07-19 20:29:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2287 transitions. [2022-07-19 20:29:12,036 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2287 transitions. Word has length 91 [2022-07-19 20:29:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:12,037 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2287 transitions. [2022-07-19 20:29:12,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-07-19 20:29:12,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2287 transitions. [2022-07-19 20:29:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:29:12,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:12,039 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] [2022-07-19 20:29:12,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 20:29:12,039 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:12,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1303262318, now seen corresponding path program 1 times [2022-07-19 20:29:12,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:12,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747362501] [2022-07-19 20:29:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:12,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:12,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:12,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747362501] [2022-07-19 20:29:12,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747362501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:12,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:12,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 20:29:12,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877742638] [2022-07-19 20:29:12,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:12,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 20:29:12,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:12,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 20:29:12,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:12,105 INFO L87 Difference]: Start difference. First operand 1666 states and 2287 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-07-19 20:29:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:13,303 INFO L93 Difference]: Finished difference Result 3745 states and 5549 transitions. [2022-07-19 20:29:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 20:29:13,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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 91 [2022-07-19 20:29:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:13,318 INFO L225 Difference]: With dead ends: 3745 [2022-07-19 20:29:13,318 INFO L226 Difference]: Without dead ends: 3035 [2022-07-19 20:29:13,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-19 20:29:13,322 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 1008 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:13,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 1748 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 20:29:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2022-07-19 20:29:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2350. [2022-07-19 20:29:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2066 states have (on average 1.40513068731849) internal successors, (2903), 2104 states have internal predecessors, (2903), 169 states have call successors, (169), 86 states have call predecessors, (169), 113 states have return successors, (281), 167 states have call predecessors, (281), 166 states have call successors, (281) [2022-07-19 20:29:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3353 transitions. [2022-07-19 20:29:13,443 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3353 transitions. Word has length 91 [2022-07-19 20:29:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:13,443 INFO L495 AbstractCegarLoop]: Abstraction has 2350 states and 3353 transitions. [2022-07-19 20:29:13,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-07-19 20:29:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3353 transitions. [2022-07-19 20:29:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:29:13,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:13,446 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] [2022-07-19 20:29:13,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 20:29:13,446 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:13,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:13,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1083247188, now seen corresponding path program 1 times [2022-07-19 20:29:13,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:13,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782114294] [2022-07-19 20:29:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:13,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:13,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:13,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:13,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:13,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:13,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:13,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782114294] [2022-07-19 20:29:13,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782114294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:13,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:13,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 20:29:13,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213505248] [2022-07-19 20:29:13,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:13,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 20:29:13,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:13,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 20:29:13,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:13,507 INFO L87 Difference]: Start difference. First operand 2350 states and 3353 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-07-19 20:29:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:14,760 INFO L93 Difference]: Finished difference Result 6370 states and 9715 transitions. [2022-07-19 20:29:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 20:29:14,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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 91 [2022-07-19 20:29:14,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:14,778 INFO L225 Difference]: With dead ends: 6370 [2022-07-19 20:29:14,779 INFO L226 Difference]: Without dead ends: 4976 [2022-07-19 20:29:14,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-19 20:29:14,783 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 1095 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:14,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 1753 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 20:29:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2022-07-19 20:29:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3808. [2022-07-19 20:29:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3334 states have (on average 1.455608878224355) internal successors, (4853), 3418 states have internal predecessors, (4853), 265 states have call successors, (265), 134 states have call predecessors, (265), 207 states have return successors, (585), 271 states have call predecessors, (585), 262 states have call successors, (585) [2022-07-19 20:29:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5703 transitions. [2022-07-19 20:29:14,956 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5703 transitions. Word has length 91 [2022-07-19 20:29:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:14,956 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5703 transitions. [2022-07-19 20:29:14,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-07-19 20:29:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5703 transitions. [2022-07-19 20:29:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:29:14,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:14,997 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] [2022-07-19 20:29:14,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 20:29:14,997 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1575873362, now seen corresponding path program 1 times [2022-07-19 20:29:14,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:14,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134403907] [2022-07-19 20:29:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:14,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:15,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:15,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134403907] [2022-07-19 20:29:15,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134403907] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:15,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:15,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:15,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846322127] [2022-07-19 20:29:15,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:15,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:15,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:15,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:15,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:15,080 INFO L87 Difference]: Start difference. First operand 3808 states and 5703 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-07-19 20:29:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:15,746 INFO L93 Difference]: Finished difference Result 7689 states and 12021 transitions. [2022-07-19 20:29:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:29:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-07-19 20:29:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:15,761 INFO L225 Difference]: With dead ends: 7689 [2022-07-19 20:29:15,761 INFO L226 Difference]: Without dead ends: 4835 [2022-07-19 20:29:15,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:29:15,767 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 612 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:15,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1005 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 20:29:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2022-07-19 20:29:15,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 3808. [2022-07-19 20:29:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3334 states have (on average 1.4505098980203959) internal successors, (4836), 3418 states have internal predecessors, (4836), 265 states have call successors, (265), 134 states have call predecessors, (265), 207 states have return successors, (585), 271 states have call predecessors, (585), 262 states have call successors, (585) [2022-07-19 20:29:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5686 transitions. [2022-07-19 20:29:15,941 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5686 transitions. Word has length 91 [2022-07-19 20:29:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:15,942 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5686 transitions. [2022-07-19 20:29:15,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-07-19 20:29:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5686 transitions. [2022-07-19 20:29:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:29:15,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:15,945 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] [2022-07-19 20:29:15,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 20:29:15,946 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash -621933204, now seen corresponding path program 1 times [2022-07-19 20:29:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:15,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454371280] [2022-07-19 20:29:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:15,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:16,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:16,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454371280] [2022-07-19 20:29:16,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454371280] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:16,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:16,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 20:29:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509030015] [2022-07-19 20:29:16,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:16,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:29:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:16,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:29:16,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:29:16,026 INFO L87 Difference]: Start difference. First operand 3808 states and 5686 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-19 20:29:17,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:17,107 INFO L93 Difference]: Finished difference Result 9304 states and 14395 transitions. [2022-07-19 20:29:17,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:29:17,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 91 [2022-07-19 20:29:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:17,126 INFO L225 Difference]: With dead ends: 9304 [2022-07-19 20:29:17,126 INFO L226 Difference]: Without dead ends: 6452 [2022-07-19 20:29:17,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 20:29:17,136 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 956 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:17,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 1335 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 20:29:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6452 states. [2022-07-19 20:29:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6452 to 5140. [2022-07-19 20:29:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5140 states, 4494 states have (on average 1.4581664441477526) internal successors, (6553), 4606 states have internal predecessors, (6553), 369 states have call successors, (369), 182 states have call predecessors, (369), 275 states have return successors, (753), 367 states have call predecessors, (753), 366 states have call successors, (753) [2022-07-19 20:29:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5140 states to 5140 states and 7675 transitions. [2022-07-19 20:29:17,410 INFO L78 Accepts]: Start accepts. Automaton has 5140 states and 7675 transitions. Word has length 91 [2022-07-19 20:29:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:17,411 INFO L495 AbstractCegarLoop]: Abstraction has 5140 states and 7675 transitions. [2022-07-19 20:29:17,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-19 20:29:17,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5140 states and 7675 transitions. [2022-07-19 20:29:17,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 20:29:17,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:17,416 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] [2022-07-19 20:29:17,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 20:29:17,417 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:17,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1212598261, now seen corresponding path program 1 times [2022-07-19 20:29:17,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:17,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370854888] [2022-07-19 20:29:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:17,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:17,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:17,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:17,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:29:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 20:29:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:17,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 20:29:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 20:29:17,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370854888] [2022-07-19 20:29:17,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370854888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379251561] [2022-07-19 20:29:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:17,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:17,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:17,470 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) [2022-07-19 20:29:17,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 20:29:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:17,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:17,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 20:29:17,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:17,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379251561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:17,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:17,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 20:29:17,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379759033] [2022-07-19 20:29:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:17,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:17,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:17,557 INFO L87 Difference]: Start difference. First operand 5140 states and 7675 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) [2022-07-19 20:29:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:17,735 INFO L93 Difference]: Finished difference Result 5517 states and 8136 transitions. [2022-07-19 20:29:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:17,736 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 [2022-07-19 20:29:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:17,745 INFO L225 Difference]: With dead ends: 5517 [2022-07-19 20:29:17,745 INFO L226 Difference]: Without dead ends: 4199 [2022-07-19 20:29:17,748 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 [2022-07-19 20:29:17,749 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 61 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 751 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 [2022-07-19 20:29:17,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 751 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2022-07-19 20:29:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 4199. [2022-07-19 20:29:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4199 states, 3656 states have (on average 1.512035010940919) internal successors, (5528), 3752 states have internal predecessors, (5528), 312 states have call successors, (312), 145 states have call predecessors, (312), 230 states have return successors, (661), 317 states have call predecessors, (661), 310 states have call successors, (661) [2022-07-19 20:29:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6501 transitions. [2022-07-19 20:29:17,926 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6501 transitions. Word has length 103 [2022-07-19 20:29:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:17,926 INFO L495 AbstractCegarLoop]: Abstraction has 4199 states and 6501 transitions. [2022-07-19 20:29:17,926 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) [2022-07-19 20:29:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6501 transitions. [2022-07-19 20:29:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-19 20:29:17,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:17,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:17,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:18,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:18,151 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash 938550496, now seen corresponding path program 1 times [2022-07-19 20:29:18,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:18,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86844592] [2022-07-19 20:29:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:18,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 20:29:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-19 20:29:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 20:29:18,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:18,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86844592] [2022-07-19 20:29:18,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86844592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:18,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126439522] [2022-07-19 20:29:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:18,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:18,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:18,280 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:18,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 20:29:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:18,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 20:29:18,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:18,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126439522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:18,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:18,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 20:29:18,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874908389] [2022-07-19 20:29:18,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:18,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:18,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:18,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:18,446 INFO L87 Difference]: Start difference. First operand 4199 states and 6501 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 20:29:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:18,832 INFO L93 Difference]: Finished difference Result 12445 states and 19391 transitions. [2022-07-19 20:29:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:18,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 147 [2022-07-19 20:29:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:18,856 INFO L225 Difference]: With dead ends: 12445 [2022-07-19 20:29:18,856 INFO L226 Difference]: Without dead ends: 8261 [2022-07-19 20:29:18,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:18,869 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 224 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:18,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8261 states. [2022-07-19 20:29:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8261 to 8209. [2022-07-19 20:29:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8209 states, 7156 states have (on average 1.5125768585802124) internal successors, (10824), 7346 states have internal predecessors, (10824), 592 states have call successors, (592), 289 states have call predecessors, (592), 460 states have return successors, (1261), 589 states have call predecessors, (1261), 590 states have call successors, (1261) [2022-07-19 20:29:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8209 states to 8209 states and 12677 transitions. [2022-07-19 20:29:19,334 INFO L78 Accepts]: Start accepts. Automaton has 8209 states and 12677 transitions. Word has length 147 [2022-07-19 20:29:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:19,334 INFO L495 AbstractCegarLoop]: Abstraction has 8209 states and 12677 transitions. [2022-07-19 20:29:19,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 20:29:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 8209 states and 12677 transitions. [2022-07-19 20:29:19,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-19 20:29:19,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:19,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:19,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 20:29:19,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:19,562 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:19,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1136564032, now seen corresponding path program 1 times [2022-07-19 20:29:19,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:19,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679329044] [2022-07-19 20:29:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:19,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 20:29:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-19 20:29:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 20:29:19,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:19,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679329044] [2022-07-19 20:29:19,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679329044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:19,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573103470] [2022-07-19 20:29:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:19,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:19,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:19,644 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:19,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 20:29:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:19,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 20:29:19,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:19,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573103470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:19,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:19,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 20:29:19,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567241090] [2022-07-19 20:29:19,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:19,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:19,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:19,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:19,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:19,787 INFO L87 Difference]: Start difference. First operand 8209 states and 12677 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 20:29:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:20,473 INFO L93 Difference]: Finished difference Result 24427 states and 37983 transitions. [2022-07-19 20:29:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:20,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 147 [2022-07-19 20:29:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:20,515 INFO L225 Difference]: With dead ends: 24427 [2022-07-19 20:29:20,515 INFO L226 Difference]: Without dead ends: 16233 [2022-07-19 20:29:20,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:20,534 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 212 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:20,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16233 states. [2022-07-19 20:29:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16233 to 16133. [2022-07-19 20:29:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16133 states, 14060 states have (on average 1.5112375533428164) internal successors, (21248), 14438 states have internal predecessors, (21248), 1152 states have call successors, (1152), 577 states have call predecessors, (1152), 920 states have return successors, (2461), 1133 states have call predecessors, (2461), 1150 states have call successors, (2461) [2022-07-19 20:29:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16133 states to 16133 states and 24861 transitions. [2022-07-19 20:29:21,409 INFO L78 Accepts]: Start accepts. Automaton has 16133 states and 24861 transitions. Word has length 147 [2022-07-19 20:29:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:21,410 INFO L495 AbstractCegarLoop]: Abstraction has 16133 states and 24861 transitions. [2022-07-19 20:29:21,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 20:29:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 16133 states and 24861 transitions. [2022-07-19 20:29:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-19 20:29:21,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:21,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:21,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:21,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:21,649 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:21,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1659927712, now seen corresponding path program 1 times [2022-07-19 20:29:21,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:21,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879278981] [2022-07-19 20:29:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:21,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 20:29:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-19 20:29:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 20:29:21,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:21,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879278981] [2022-07-19 20:29:21,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879278981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:21,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7199758] [2022-07-19 20:29:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:21,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:21,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:21,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:21,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 20:29:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:21,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 20:29:21,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:21,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7199758] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:21,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:21,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 20:29:21,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748623753] [2022-07-19 20:29:21,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:21,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:21,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:21,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:21,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:21,861 INFO L87 Difference]: Start difference. First operand 16133 states and 24861 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 20:29:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:23,216 INFO L93 Difference]: Finished difference Result 47731 states and 74283 transitions. [2022-07-19 20:29:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:23,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 147 [2022-07-19 20:29:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:23,335 INFO L225 Difference]: With dead ends: 47731 [2022-07-19 20:29:23,335 INFO L226 Difference]: Without dead ends: 31615 [2022-07-19 20:29:23,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:23,375 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 229 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:23,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 782 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31615 states. [2022-07-19 20:29:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31615 to 31615. [2022-07-19 20:29:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31615 states, 27537 states have (on average 1.503431746377601) internal successors, (41400), 28260 states have internal predecessors, (41400), 2237 states have call successors, (2237), 1153 states have call predecessors, (2237), 1840 states have return successors, (5363), 2233 states have call predecessors, (5363), 2235 states have call successors, (5363) [2022-07-19 20:29:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31615 states to 31615 states and 49000 transitions. [2022-07-19 20:29:25,138 INFO L78 Accepts]: Start accepts. Automaton has 31615 states and 49000 transitions. Word has length 147 [2022-07-19 20:29:25,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:25,139 INFO L495 AbstractCegarLoop]: Abstraction has 31615 states and 49000 transitions. [2022-07-19 20:29:25,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 20:29:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 31615 states and 49000 transitions. [2022-07-19 20:29:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-19 20:29:25,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:25,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:25,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:25,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 20:29:25,485 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:25,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1981268215, now seen corresponding path program 1 times [2022-07-19 20:29:25,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:25,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526347261] [2022-07-19 20:29:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:25,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 20:29:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-07-19 20:29:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-07-19 20:29:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 20:29:25,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:25,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526347261] [2022-07-19 20:29:25,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526347261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:25,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429258288] [2022-07-19 20:29:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:25,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:25,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:25,571 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:25,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 20:29:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:25,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:25,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 20:29:25,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:25,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429258288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:25,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:25,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 20:29:25,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355096437] [2022-07-19 20:29:25,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:25,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:25,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:25,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:25,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:25,814 INFO L87 Difference]: Start difference. First operand 31615 states and 49000 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 20:29:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:28,746 INFO L93 Difference]: Finished difference Result 93763 states and 146572 transitions. [2022-07-19 20:29:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:28,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 191 [2022-07-19 20:29:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:28,977 INFO L225 Difference]: With dead ends: 93763 [2022-07-19 20:29:28,977 INFO L226 Difference]: Without dead ends: 62171 [2022-07-19 20:29:29,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:29,064 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 164 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:29,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62171 states. [2022-07-19 20:29:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62171 to 61783. [2022-07-19 20:29:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61783 states, 53881 states have (on average 1.5037582821402722) internal successors, (81024), 55324 states have internal predecessors, (81024), 4245 states have call successors, (4245), 2281 states have call predecessors, (4245), 3656 states have return successors, (10321), 4209 states have call predecessors, (10321), 4243 states have call successors, (10321) [2022-07-19 20:29:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61783 states to 61783 states and 95590 transitions. [2022-07-19 20:29:32,721 INFO L78 Accepts]: Start accepts. Automaton has 61783 states and 95590 transitions. Word has length 191 [2022-07-19 20:29:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:32,722 INFO L495 AbstractCegarLoop]: Abstraction has 61783 states and 95590 transitions. [2022-07-19 20:29:32,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 20:29:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 61783 states and 95590 transitions. [2022-07-19 20:29:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-19 20:29:32,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:32,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:32,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:33,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-19 20:29:33,084 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:33,084 INFO L85 PathProgramCache]: Analyzing trace with hash -275882679, now seen corresponding path program 1 times [2022-07-19 20:29:33,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:33,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136090521] [2022-07-19 20:29:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:33,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-19 20:29:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-19 20:29:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-07-19 20:29:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 20:29:33,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:33,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136090521] [2022-07-19 20:29:33,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136090521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:33,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501451146] [2022-07-19 20:29:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:33,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:33,193 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:33,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 20:29:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:33,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 20:29:33,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:33,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501451146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:33,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:33,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 20:29:33,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585541267] [2022-07-19 20:29:33,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:33,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:33,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:33,484 INFO L87 Difference]: Start difference. First operand 61783 states and 95590 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 20:29:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:39,223 INFO L93 Difference]: Finished difference Result 183883 states and 287012 transitions. [2022-07-19 20:29:39,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:39,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 191 [2022-07-19 20:29:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:39,815 INFO L225 Difference]: With dead ends: 183883 [2022-07-19 20:29:39,815 INFO L226 Difference]: Without dead ends: 122123 [2022-07-19 20:29:39,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:39,968 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 166 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:39,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 550 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122123 states. [2022-07-19 20:29:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122123 to 121351. [2022-07-19 20:29:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121351 states, 105801 states have (on average 1.5021408115235206) internal successors, (158928), 108684 states have internal predecessors, (158928), 8261 states have call successors, (8261), 4537 states have call predecessors, (8261), 7288 states have return successors, (20237), 8161 states have call predecessors, (20237), 8259 states have call successors, (20237) [2022-07-19 20:29:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121351 states to 121351 states and 187426 transitions. [2022-07-19 20:29:46,823 INFO L78 Accepts]: Start accepts. Automaton has 121351 states and 187426 transitions. Word has length 191 [2022-07-19 20:29:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:46,824 INFO L495 AbstractCegarLoop]: Abstraction has 121351 states and 187426 transitions. [2022-07-19 20:29:46,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 20:29:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 121351 states and 187426 transitions. [2022-07-19 20:29:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-19 20:29:47,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:47,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:47,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:47,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-19 20:29:47,735 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:47,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1664764034, now seen corresponding path program 1 times [2022-07-19 20:29:47,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:47,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886112703] [2022-07-19 20:29:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:47,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 20:29:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 20:29:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:29:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 20:29:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-19 20:29:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-19 20:29:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-07-19 20:29:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-19 20:29:47,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:47,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886112703] [2022-07-19 20:29:47,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886112703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:47,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224631037] [2022-07-19 20:29:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:47,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:47,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:47,819 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:47,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 20:29:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:47,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 20:29:48,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:48,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224631037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:48,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:48,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 20:29:48,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572895212] [2022-07-19 20:29:48,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:48,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:48,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:48,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:48,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:48,026 INFO L87 Difference]: Start difference. First operand 121351 states and 187426 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 20:29:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:53,633 INFO L93 Difference]: Finished difference Result 183557 states and 284310 transitions. [2022-07-19 20:29:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:53,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 210 [2022-07-19 20:29:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:53,936 INFO L225 Difference]: With dead ends: 183557 [2022-07-19 20:29:53,936 INFO L226 Difference]: Without dead ends: 100009 [2022-07-19 20:29:54,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:54,094 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 191 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:54,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 323 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100009 states.