./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.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 0bef365bd29db1ac20249b1e3139137560ac4134ff54f631658e57cc437eb0ce --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:03:47,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:03:47,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:03:47,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:03:47,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:03:47,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:03:47,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:03:47,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:03:47,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:03:47,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:03:47,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:03:47,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:03:47,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:03:47,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:03:47,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:03:47,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:03:47,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:03:47,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:03:47,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:03:47,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:03:47,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:03:47,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:03:47,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:03:47,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:03:47,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:03:47,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:03:47,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:03:47,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:03:47,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:03:47,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:03:47,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:03:47,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:03:47,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:03:47,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:03:47,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:03:47,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:03:47,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:03:47,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:03:47,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:03:47,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:03:47,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:03:47,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:03:47,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:03:47,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:03:47,569 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:03:47,569 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:03:47,570 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:03:47,570 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:03:47,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:03:47,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:03:47,571 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:03:47,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:03:47,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:03:47,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:03:47,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:03:47,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:03:47,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:03:47,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:03:47,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:03:47,573 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:03:47,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:03:47,573 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:03:47,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:03:47,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:03:47,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:03:47,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:03:47,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:03:47,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:03:47,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:03:47,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:03:47,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:03:47,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:03:47,575 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:03:47,575 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:03:47,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:03:47,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:03:47,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bef365bd29db1ac20249b1e3139137560ac4134ff54f631658e57cc437eb0ce [2021-12-17 21:03:47,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:03:47,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:03:47,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:03:47,801 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:03:47,802 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:03:47,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c [2021-12-17 21:03:47,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef998a02a/8b54937b13c448999bda4669e2ddfa7f/FLAG478ab2b8c [2021-12-17 21:03:48,250 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:03:48,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c [2021-12-17 21:03:48,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef998a02a/8b54937b13c448999bda4669e2ddfa7f/FLAG478ab2b8c [2021-12-17 21:03:48,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef998a02a/8b54937b13c448999bda4669e2ddfa7f [2021-12-17 21:03:48,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:03:48,284 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:03:48,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:03:48,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:03:48,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:03:48,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1f7b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48, skipping insertion in model container [2021-12-17 21:03:48,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:03:48,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:03:48,486 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.14.cil.c[913,926] [2021-12-17 21:03:48,532 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.14.cil.c[5977,5990] [2021-12-17 21:03:48,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:03:48,635 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:03:48,642 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.14.cil.c[913,926] [2021-12-17 21:03:48,653 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.14.cil.c[5977,5990] [2021-12-17 21:03:48,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:03:48,706 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:03:48,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48 WrapperNode [2021-12-17 21:03:48,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:03:48,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:03:48,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:03:48,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:03:48,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,761 INFO L137 Inliner]: procedures = 72, calls = 85, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1058 [2021-12-17 21:03:48,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:03:48,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:03:48,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:03:48,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:03:48,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:03:48,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:03:48,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:03:48,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:03:48,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (1/1) ... [2021-12-17 21:03:48,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:03:48,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:48,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 21:03:48,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:03:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:03:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:03:48,888 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:03:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-17 21:03:48,889 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-17 21:03:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:03:48,890 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:03:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:03:48,890 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:03:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:03:48,890 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:03:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:03:48,890 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:03:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:03:48,890 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:03:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:03:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:03:48,891 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:03:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:03:48,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:03:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:03:48,891 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:03:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-17 21:03:48,892 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-17 21:03:49,020 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:03:49,022 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:03:49,735 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:03:49,744 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:03:49,744 INFO L301 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-17 21:03:49,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:03:49 BoogieIcfgContainer [2021-12-17 21:03:49,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:03:49,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:03:49,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:03:49,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:03:49,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:03:48" (1/3) ... [2021-12-17 21:03:49,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa4fa29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:03:49, skipping insertion in model container [2021-12-17 21:03:49,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:48" (2/3) ... [2021-12-17 21:03:49,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa4fa29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:03:49, skipping insertion in model container [2021-12-17 21:03:49,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:03:49" (3/3) ... [2021-12-17 21:03:49,778 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.14.cil.c [2021-12-17 21:03:49,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:03:49,781 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:03:49,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:03:49,830 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:03:49,830 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:03:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 460 states, 413 states have (on average 1.6513317191283292) internal successors, (682), 420 states have internal predecessors, (682), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-17 21:03:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 21:03:49,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:49,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:49,874 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2140149972, now seen corresponding path program 1 times [2021-12-17 21:03:49,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:49,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437628581] [2021-12-17 21:03:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:49,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 21:03:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:50,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:50,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437628581] [2021-12-17 21:03:50,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437628581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:50,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:50,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:50,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554772046] [2021-12-17 21:03:50,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:50,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:50,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:50,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:50,177 INFO L87 Difference]: Start difference. First operand has 460 states, 413 states have (on average 1.6513317191283292) internal successors, (682), 420 states have internal predecessors, (682), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:03:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:50,468 INFO L93 Difference]: Finished difference Result 964 states and 1568 transitions. [2021-12-17 21:03:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:50,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-17 21:03:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:50,485 INFO L225 Difference]: With dead ends: 964 [2021-12-17 21:03:50,486 INFO L226 Difference]: Without dead ends: 519 [2021-12-17 21:03:50,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:50,495 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 953 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:50,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1133 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:03:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-17 21:03:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2021-12-17 21:03:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 462 states have (on average 1.5346320346320346) internal successors, (709), 467 states have internal predecessors, (709), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-17 21:03:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 787 transitions. [2021-12-17 21:03:50,561 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 787 transitions. Word has length 44 [2021-12-17 21:03:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:50,561 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 787 transitions. [2021-12-17 21:03:50,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:03:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 787 transitions. [2021-12-17 21:03:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:03:50,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:50,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:50,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:03:50,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:50,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1297015323, now seen corresponding path program 1 times [2021-12-17 21:03:50,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:50,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243303990] [2021-12-17 21:03:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:50,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 21:03:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:50,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:50,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243303990] [2021-12-17 21:03:50,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243303990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:50,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:50,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:50,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453626611] [2021-12-17 21:03:50,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:50,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:50,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:50,615 INFO L87 Difference]: Start difference. First operand 513 states and 787 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:03:50,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:50,972 INFO L93 Difference]: Finished difference Result 761 states and 1127 transitions. [2021-12-17 21:03:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:50,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-17 21:03:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:50,978 INFO L225 Difference]: With dead ends: 761 [2021-12-17 21:03:50,978 INFO L226 Difference]: Without dead ends: 637 [2021-12-17 21:03:50,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:50,980 INFO L933 BasicCegarLoop]: 742 mSDtfsCounter, 369 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:50,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1496 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:03:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-12-17 21:03:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 580. [2021-12-17 21:03:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 523 states have (on average 1.5162523900573615) internal successors, (793), 528 states have internal predecessors, (793), 41 states have call successors, (41), 15 states have call predecessors, (41), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-17 21:03:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 877 transitions. [2021-12-17 21:03:51,002 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 877 transitions. Word has length 45 [2021-12-17 21:03:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:51,003 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 877 transitions. [2021-12-17 21:03:51,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:03:51,003 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 877 transitions. [2021-12-17 21:03:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:03:51,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:51,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:51,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:03:51,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:51,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1713594512, now seen corresponding path program 1 times [2021-12-17 21:03:51,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:51,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798481771] [2021-12-17 21:03:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:51,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 21:03:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:51,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:51,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798481771] [2021-12-17 21:03:51,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798481771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:51,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:51,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:51,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405084213] [2021-12-17 21:03:51,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:51,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:51,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:51,057 INFO L87 Difference]: Start difference. First operand 580 states and 877 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:03:51,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:51,208 INFO L93 Difference]: Finished difference Result 988 states and 1436 transitions. [2021-12-17 21:03:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-17 21:03:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:51,212 INFO L225 Difference]: With dead ends: 988 [2021-12-17 21:03:51,212 INFO L226 Difference]: Without dead ends: 797 [2021-12-17 21:03:51,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:51,227 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 962 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:51,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 1137 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:03:51,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-12-17 21:03:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 745. [2021-12-17 21:03:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 669 states have (on average 1.4693572496263079) internal successors, (983), 677 states have internal predecessors, (983), 52 states have call successors, (52), 22 states have call predecessors, (52), 22 states have return successors, (60), 46 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-17 21:03:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1095 transitions. [2021-12-17 21:03:51,271 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1095 transitions. Word has length 45 [2021-12-17 21:03:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:51,271 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1095 transitions. [2021-12-17 21:03:51,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:03:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1095 transitions. [2021-12-17 21:03:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 21:03:51,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:51,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:51,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:03:51,274 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:51,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1877488540, now seen corresponding path program 1 times [2021-12-17 21:03:51,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:51,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319375556] [2021-12-17 21:03:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:51,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:03:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 21:03:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:03:51,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:51,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319375556] [2021-12-17 21:03:51,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319375556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:51,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:51,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:51,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170228470] [2021-12-17 21:03:51,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:51,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:51,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:51,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:51,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:51,324 INFO L87 Difference]: Start difference. First operand 745 states and 1095 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:03:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:51,716 INFO L93 Difference]: Finished difference Result 1329 states and 1880 transitions. [2021-12-17 21:03:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-17 21:03:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:51,721 INFO L225 Difference]: With dead ends: 1329 [2021-12-17 21:03:51,721 INFO L226 Difference]: Without dead ends: 973 [2021-12-17 21:03:51,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:51,722 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 353 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:51,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1523 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:03:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-12-17 21:03:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 935. [2021-12-17 21:03:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 835 states have (on average 1.4167664670658682) internal successors, (1183), 845 states have internal predecessors, (1183), 66 states have call successors, (66), 30 states have call predecessors, (66), 32 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-17 21:03:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1333 transitions. [2021-12-17 21:03:51,759 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1333 transitions. Word has length 62 [2021-12-17 21:03:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:51,760 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1333 transitions. [2021-12-17 21:03:51,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:03:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1333 transitions. [2021-12-17 21:03:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 21:03:51,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:51,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:51,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:03:51,762 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1022869652, now seen corresponding path program 1 times [2021-12-17 21:03:51,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:51,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654484076] [2021-12-17 21:03:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:51,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:03:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:03:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 21:03:51,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:51,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654484076] [2021-12-17 21:03:51,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654484076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:51,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:51,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:51,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422069552] [2021-12-17 21:03:51,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:51,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:51,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:51,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:51,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:51,841 INFO L87 Difference]: Start difference. First operand 935 states and 1333 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 21:03:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:51,991 INFO L93 Difference]: Finished difference Result 1588 states and 2186 transitions. [2021-12-17 21:03:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:51,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-17 21:03:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:51,996 INFO L225 Difference]: With dead ends: 1588 [2021-12-17 21:03:51,996 INFO L226 Difference]: Without dead ends: 1134 [2021-12-17 21:03:51,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:51,998 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 949 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:51,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 1134 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:03:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-12-17 21:03:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1079. [2021-12-17 21:03:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 963 states have (on average 1.3852544132917965) internal successors, (1334), 975 states have internal predecessors, (1334), 74 states have call successors, (74), 36 states have call predecessors, (74), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-17 21:03:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1506 transitions. [2021-12-17 21:03:52,034 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1506 transitions. Word has length 67 [2021-12-17 21:03:52,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:52,035 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1506 transitions. [2021-12-17 21:03:52,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 21:03:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1506 transitions. [2021-12-17 21:03:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 21:03:52,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:52,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:52,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:03:52,048 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:52,049 INFO L85 PathProgramCache]: Analyzing trace with hash 604966393, now seen corresponding path program 1 times [2021-12-17 21:03:52,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:52,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676602516] [2021-12-17 21:03:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:52,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:03:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:03:52,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676602516] [2021-12-17 21:03:52,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676602516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842882968] [2021-12-17 21:03:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:52,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:52,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:03:52,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:03:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:03:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:52,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:03:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:03:52,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842882968] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:52,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:03:52,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-17 21:03:52,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818905609] [2021-12-17 21:03:52,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:52,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:52,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:52,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:52,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:52,562 INFO L87 Difference]: Start difference. First operand 1079 states and 1506 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:03:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:52,684 INFO L93 Difference]: Finished difference Result 1135 states and 1574 transitions. [2021-12-17 21:03:52,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 21:03:52,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-17 21:03:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:52,689 INFO L225 Difference]: With dead ends: 1135 [2021-12-17 21:03:52,689 INFO L226 Difference]: Without dead ends: 1132 [2021-12-17 21:03:52,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:03:52,695 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 1271 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:52,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 788 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:03:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-12-17 21:03:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1078. [2021-12-17 21:03:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 963 states have (on average 1.3831775700934579) internal successors, (1332), 974 states have internal predecessors, (1332), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-17 21:03:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1503 transitions. [2021-12-17 21:03:52,730 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1503 transitions. Word has length 68 [2021-12-17 21:03:52,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:52,731 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1503 transitions. [2021-12-17 21:03:52,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:03:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1503 transitions. [2021-12-17 21:03:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 21:03:52,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:52,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:52,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:03:52,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-17 21:03:52,936 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:52,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1572679607, now seen corresponding path program 1 times [2021-12-17 21:03:52,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:52,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405290356] [2021-12-17 21:03:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:52,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:53,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:03:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:03:53,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:53,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405290356] [2021-12-17 21:03:53,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405290356] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:53,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481011553] [2021-12-17 21:03:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:53,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:53,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:53,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:03:53,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 21:03:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:53,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:03:53,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:53,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:03:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:03:53,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481011553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:03:53,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 21:03:53,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-17 21:03:53,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398813070] [2021-12-17 21:03:53,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 21:03:53,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 21:03:53,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:53,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 21:03:53,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:53,498 INFO L87 Difference]: Start difference. First operand 1078 states and 1503 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 21:03:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:54,832 INFO L93 Difference]: Finished difference Result 2778 states and 3723 transitions. [2021-12-17 21:03:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 21:03:54,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-17 21:03:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:54,840 INFO L225 Difference]: With dead ends: 2778 [2021-12-17 21:03:54,840 INFO L226 Difference]: Without dead ends: 2234 [2021-12-17 21:03:54,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 21:03:54,843 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 1316 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 4011 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:54,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1349 Valid, 4011 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:03:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-12-17 21:03:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1467. [2021-12-17 21:03:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1313 states have (on average 1.345011424219345) internal successors, (1766), 1332 states have internal predecessors, (1766), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (132), 85 states have call predecessors, (132), 90 states have call successors, (132) [2021-12-17 21:03:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1991 transitions. [2021-12-17 21:03:54,898 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1991 transitions. Word has length 69 [2021-12-17 21:03:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:54,899 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 1991 transitions. [2021-12-17 21:03:54,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 21:03:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1991 transitions. [2021-12-17 21:03:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-17 21:03:54,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:54,902 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:54,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 21:03:55,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-17 21:03:55,116 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:55,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:55,116 INFO L85 PathProgramCache]: Analyzing trace with hash 498798882, now seen corresponding path program 1 times [2021-12-17 21:03:55,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:55,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68943775] [2021-12-17 21:03:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:55,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 21:03:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 21:03:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 21:03:55,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68943775] [2021-12-17 21:03:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68943775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794694183] [2021-12-17 21:03:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:55,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:55,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:55,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:03:55,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 21:03:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:03:55,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:03:55,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:03:55,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794694183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:55,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:03:55,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:03:55,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536741678] [2021-12-17 21:03:55,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:55,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:03:55,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:55,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:03:55,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:55,378 INFO L87 Difference]: Start difference. First operand 1467 states and 1991 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 21:03:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:55,418 INFO L93 Difference]: Finished difference Result 2190 states and 2929 transitions. [2021-12-17 21:03:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:03:55,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-17 21:03:55,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:55,424 INFO L225 Difference]: With dead ends: 2190 [2021-12-17 21:03:55,424 INFO L226 Difference]: Without dead ends: 1345 [2021-12-17 21:03:55,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:55,426 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 656 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:55,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 802 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:03:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-12-17 21:03:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1330. [2021-12-17 21:03:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1192 states have (on average 1.348993288590604) internal successors, (1608), 1210 states have internal predecessors, (1608), 85 states have call successors, (85), 44 states have call predecessors, (85), 51 states have return successors, (118), 76 states have call predecessors, (118), 82 states have call successors, (118) [2021-12-17 21:03:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1811 transitions. [2021-12-17 21:03:55,475 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1811 transitions. Word has length 88 [2021-12-17 21:03:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:55,475 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 1811 transitions. [2021-12-17 21:03:55,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 21:03:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1811 transitions. [2021-12-17 21:03:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 21:03:55,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:55,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:55,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 21:03:55,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:55,694 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:55,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1813831709, now seen corresponding path program 1 times [2021-12-17 21:03:55,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:55,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340688051] [2021-12-17 21:03:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:55,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:03:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 21:03:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 21:03:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 21:03:55,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:55,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340688051] [2021-12-17 21:03:55,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340688051] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:55,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788913172] [2021-12-17 21:03:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:55,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:55,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:55,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:03:55,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 21:03:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:03:55,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:03:56,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:03:56,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788913172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:56,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:03:56,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:03:56,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932381581] [2021-12-17 21:03:56,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:56,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:03:56,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:56,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:03:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:56,003 INFO L87 Difference]: Start difference. First operand 1330 states and 1811 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 21:03:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:56,041 INFO L93 Difference]: Finished difference Result 1709 states and 2279 transitions. [2021-12-17 21:03:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:03:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-17 21:03:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:56,044 INFO L225 Difference]: With dead ends: 1709 [2021-12-17 21:03:56,044 INFO L226 Difference]: Without dead ends: 383 [2021-12-17 21:03:56,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:56,048 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 62 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:56,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1412 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:03:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-17 21:03:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-12-17 21:03:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5804597701149425) internal successors, (550), 350 states have internal predecessors, (550), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 21:03:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 604 transitions. [2021-12-17 21:03:56,060 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 604 transitions. Word has length 103 [2021-12-17 21:03:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:56,061 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 604 transitions. [2021-12-17 21:03:56,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 21:03:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 604 transitions. [2021-12-17 21:03:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:03:56,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:56,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:56,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 21:03:56,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:56,279 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash -659936082, now seen corresponding path program 1 times [2021-12-17 21:03:56,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:56,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206707123] [2021-12-17 21:03:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:56,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:03:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:03:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:03:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:03:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:56,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:56,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206707123] [2021-12-17 21:03:56,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206707123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:56,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:56,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:03:56,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476730224] [2021-12-17 21:03:56,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:56,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:03:56,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:56,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:03:56,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:56,398 INFO L87 Difference]: Start difference. First operand 383 states and 604 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 21:03:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:57,471 INFO L93 Difference]: Finished difference Result 901 states and 1444 transitions. [2021-12-17 21:03:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:03:57,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 179 [2021-12-17 21:03:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:57,474 INFO L225 Difference]: With dead ends: 901 [2021-12-17 21:03:57,474 INFO L226 Difference]: Without dead ends: 525 [2021-12-17 21:03:57,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:57,475 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 1042 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:57,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 1085 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:03:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-17 21:03:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 383. [2021-12-17 21:03:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5775862068965518) internal successors, (549), 350 states have internal predecessors, (549), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 21:03:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 603 transitions. [2021-12-17 21:03:57,493 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 603 transitions. Word has length 179 [2021-12-17 21:03:57,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:57,493 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 603 transitions. [2021-12-17 21:03:57,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 21:03:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 603 transitions. [2021-12-17 21:03:57,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:03:57,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:57,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:57,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:03:57,496 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:57,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1308528852, now seen corresponding path program 1 times [2021-12-17 21:03:57,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:57,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437835296] [2021-12-17 21:03:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:57,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:03:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:03:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:03:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:03:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:57,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:57,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437835296] [2021-12-17 21:03:57,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437835296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:57,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:57,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:03:57,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708251764] [2021-12-17 21:03:57,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:57,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:03:57,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:03:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:57,614 INFO L87 Difference]: Start difference. First operand 383 states and 603 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 21:03:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:58,707 INFO L93 Difference]: Finished difference Result 893 states and 1427 transitions. [2021-12-17 21:03:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:03:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 179 [2021-12-17 21:03:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:58,711 INFO L225 Difference]: With dead ends: 893 [2021-12-17 21:03:58,711 INFO L226 Difference]: Without dead ends: 525 [2021-12-17 21:03:58,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:58,712 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 1033 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:58,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1083 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:03:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-17 21:03:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 383. [2021-12-17 21:03:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5747126436781609) internal successors, (548), 350 states have internal predecessors, (548), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 21:03:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 602 transitions. [2021-12-17 21:03:58,732 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 602 transitions. Word has length 179 [2021-12-17 21:03:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:58,733 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 602 transitions. [2021-12-17 21:03:58,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 21:03:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 602 transitions. [2021-12-17 21:03:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:03:58,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:58,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:58,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 21:03:58,735 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:58,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:58,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1807085654, now seen corresponding path program 1 times [2021-12-17 21:03:58,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:58,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025299846] [2021-12-17 21:03:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:58,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:03:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:03:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:03:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:03:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:58,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:58,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025299846] [2021-12-17 21:03:58,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025299846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:58,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:58,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:03:58,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749301548] [2021-12-17 21:03:58,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:58,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:03:58,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:03:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:03:58,850 INFO L87 Difference]: Start difference. First operand 383 states and 602 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-12-17 21:04:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:01,034 INFO L93 Difference]: Finished difference Result 1409 states and 2265 transitions. [2021-12-17 21:04:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:04:01,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 179 [2021-12-17 21:04:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:01,038 INFO L225 Difference]: With dead ends: 1409 [2021-12-17 21:04:01,038 INFO L226 Difference]: Without dead ends: 1047 [2021-12-17 21:04:01,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:01,039 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 1564 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:01,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 1745 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 21:04:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-12-17 21:04:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 762. [2021-12-17 21:04:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 699 states have (on average 1.5879828326180256) internal successors, (1110), 702 states have internal predecessors, (1110), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-17 21:04:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1209 transitions. [2021-12-17 21:04:01,070 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1209 transitions. Word has length 179 [2021-12-17 21:04:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:01,070 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1209 transitions. [2021-12-17 21:04:01,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-12-17 21:04:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1209 transitions. [2021-12-17 21:04:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:04:01,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:01,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:01,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:04:01,072 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:01,073 INFO L85 PathProgramCache]: Analyzing trace with hash -826130840, now seen corresponding path program 1 times [2021-12-17 21:04:01,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:01,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138666872] [2021-12-17 21:04:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:01,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:01,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:01,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138666872] [2021-12-17 21:04:01,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138666872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:01,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:01,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:01,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562821652] [2021-12-17 21:04:01,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:01,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:01,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:01,198 INFO L87 Difference]: Start difference. First operand 762 states and 1209 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:02,621 INFO L93 Difference]: Finished difference Result 1808 states and 2914 transitions. [2021-12-17 21:04:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:04:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:04:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:02,625 INFO L225 Difference]: With dead ends: 1808 [2021-12-17 21:04:02,625 INFO L226 Difference]: Without dead ends: 1067 [2021-12-17 21:04:02,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:02,630 INFO L933 BasicCegarLoop]: 661 mSDtfsCounter, 1126 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:02,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 1615 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:04:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-12-17 21:04:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 762. [2021-12-17 21:04:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 699 states have (on average 1.5851216022889842) internal successors, (1108), 702 states have internal predecessors, (1108), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-17 21:04:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1207 transitions. [2021-12-17 21:04:02,662 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1207 transitions. Word has length 179 [2021-12-17 21:04:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:02,663 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1207 transitions. [2021-12-17 21:04:02,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:02,663 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1207 transitions. [2021-12-17 21:04:02,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:04:02,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:02,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:02,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:04:02,665 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1699364842, now seen corresponding path program 1 times [2021-12-17 21:04:02,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:02,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853589943] [2021-12-17 21:04:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:02,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:02,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:02,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:02,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:02,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:02,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:02,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:02,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853589943] [2021-12-17 21:04:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853589943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:02,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:02,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:02,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207176636] [2021-12-17 21:04:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:02,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:02,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:02,776 INFO L87 Difference]: Start difference. First operand 762 states and 1207 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:05,421 INFO L93 Difference]: Finished difference Result 2324 states and 3737 transitions. [2021-12-17 21:04:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:05,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:04:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:05,427 INFO L225 Difference]: With dead ends: 2324 [2021-12-17 21:04:05,427 INFO L226 Difference]: Without dead ends: 1583 [2021-12-17 21:04:05,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:05,429 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 1582 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1601 SdHoareTripleChecker+Valid, 3006 SdHoareTripleChecker+Invalid, 3144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:05,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1601 Valid, 3006 Invalid, 3144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3065 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:04:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-12-17 21:04:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1114. [2021-12-17 21:04:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1023 states have (on average 1.5786901270772238) internal successors, (1615), 1027 states have internal predecessors, (1615), 70 states have call successors, (70), 19 states have call predecessors, (70), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-17 21:04:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1758 transitions. [2021-12-17 21:04:05,493 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1758 transitions. Word has length 179 [2021-12-17 21:04:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:05,493 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1758 transitions. [2021-12-17 21:04:05,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:05,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1758 transitions. [2021-12-17 21:04:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:04:05,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:05,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:05,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:04:05,495 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1088095784, now seen corresponding path program 1 times [2021-12-17 21:04:05,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:05,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050196267] [2021-12-17 21:04:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:05,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:05,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:05,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:05,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:05,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:05,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:05,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:05,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050196267] [2021-12-17 21:04:05,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050196267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:05,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:05,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:05,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182824412] [2021-12-17 21:04:05,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:05,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:05,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:05,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:05,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:05,609 INFO L87 Difference]: Start difference. First operand 1114 states and 1758 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:08,328 INFO L93 Difference]: Finished difference Result 3676 states and 5900 transitions. [2021-12-17 21:04:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:08,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:04:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:08,337 INFO L225 Difference]: With dead ends: 3676 [2021-12-17 21:04:08,337 INFO L226 Difference]: Without dead ends: 2583 [2021-12-17 21:04:08,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:08,342 INFO L933 BasicCegarLoop]: 1011 mSDtfsCounter, 1579 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3063 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:08,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1598 Valid, 2994 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3063 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:04:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-12-17 21:04:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1820. [2021-12-17 21:04:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1673 states have (on average 1.5732217573221758) internal successors, (2632), 1679 states have internal predecessors, (2632), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-17 21:04:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2867 transitions. [2021-12-17 21:04:08,425 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2867 transitions. Word has length 179 [2021-12-17 21:04:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:08,426 INFO L470 AbstractCegarLoop]: Abstraction has 1820 states and 2867 transitions. [2021-12-17 21:04:08,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2867 transitions. [2021-12-17 21:04:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:04:08,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:08,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:08,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:04:08,429 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:08,429 INFO L85 PathProgramCache]: Analyzing trace with hash -317095894, now seen corresponding path program 1 times [2021-12-17 21:04:08,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:08,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082948672] [2021-12-17 21:04:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:08,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:08,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:08,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:08,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:08,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:08,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:08,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:08,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082948672] [2021-12-17 21:04:08,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082948672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:08,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:08,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:08,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976580065] [2021-12-17 21:04:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:08,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:08,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:08,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:08,550 INFO L87 Difference]: Start difference. First operand 1820 states and 2867 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:11,392 INFO L93 Difference]: Finished difference Result 6280 states and 10041 transitions. [2021-12-17 21:04:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:04:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:11,411 INFO L225 Difference]: With dead ends: 6280 [2021-12-17 21:04:11,411 INFO L226 Difference]: Without dead ends: 4481 [2021-12-17 21:04:11,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:11,416 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 1578 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3055 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 2988 SdHoareTripleChecker+Invalid, 3140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:11,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 2988 Invalid, 3140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3055 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:04:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4481 states. [2021-12-17 21:04:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4481 to 3234. [2021-12-17 21:04:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 2975 states have (on average 1.569075630252101) internal successors, (4668), 2985 states have internal predecessors, (4668), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-17 21:04:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 5093 transitions. [2021-12-17 21:04:11,594 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 5093 transitions. Word has length 179 [2021-12-17 21:04:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:11,594 INFO L470 AbstractCegarLoop]: Abstraction has 3234 states and 5093 transitions. [2021-12-17 21:04:11,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 5093 transitions. [2021-12-17 21:04:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:04:11,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:11,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:11,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:04:11,597 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:11,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:11,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1577237992, now seen corresponding path program 1 times [2021-12-17 21:04:11,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:11,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837303733] [2021-12-17 21:04:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:11,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:11,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:11,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:11,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:11,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:11,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:11,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:11,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837303733] [2021-12-17 21:04:11,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837303733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:11,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:11,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:11,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128801357] [2021-12-17 21:04:11,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:11,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:11,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:11,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:11,721 INFO L87 Difference]: Start difference. First operand 3234 states and 5093 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:14,673 INFO L93 Difference]: Finished difference Result 11480 states and 18327 transitions. [2021-12-17 21:04:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:14,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:04:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:14,698 INFO L225 Difference]: With dead ends: 11480 [2021-12-17 21:04:14,699 INFO L226 Difference]: Without dead ends: 8267 [2021-12-17 21:04:14,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:14,708 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 1573 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3035 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 3121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:14,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1592 Valid, 2980 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3035 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:04:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-12-17 21:04:15,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 6077. [2021-12-17 21:04:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 5594 states have (on average 1.5670361101179835) internal successors, (8766), 5612 states have internal predecessors, (8766), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-17 21:04:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 9589 transitions. [2021-12-17 21:04:15,075 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 9589 transitions. Word has length 179 [2021-12-17 21:04:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:15,076 INFO L470 AbstractCegarLoop]: Abstraction has 6077 states and 9589 transitions. [2021-12-17 21:04:15,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 9589 transitions. [2021-12-17 21:04:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:04:15,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:15,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:15,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:04:15,081 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:15,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:15,081 INFO L85 PathProgramCache]: Analyzing trace with hash 654070566, now seen corresponding path program 1 times [2021-12-17 21:04:15,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:15,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634245738] [2021-12-17 21:04:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:15,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:15,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:15,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634245738] [2021-12-17 21:04:15,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634245738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:15,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:15,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:15,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199528132] [2021-12-17 21:04:15,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:15,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:15,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:15,212 INFO L87 Difference]: Start difference. First operand 6077 states and 9589 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:18,516 INFO L93 Difference]: Finished difference Result 21899 states and 34993 transitions. [2021-12-17 21:04:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:18,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:04:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:18,584 INFO L225 Difference]: With dead ends: 21899 [2021-12-17 21:04:18,584 INFO L226 Difference]: Without dead ends: 15843 [2021-12-17 21:04:18,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:18,600 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 1572 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3027 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1591 SdHoareTripleChecker+Valid, 2975 SdHoareTripleChecker+Invalid, 3113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:18,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1591 Valid, 2975 Invalid, 3113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3027 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 21:04:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15843 states. [2021-12-17 21:04:19,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15843 to 11776. [2021-12-17 21:04:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11776 states, 10845 states have (on average 1.565698478561549) internal successors, (16980), 10879 states have internal predecessors, (16980), 700 states have call successors, (700), 199 states have call predecessors, (700), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2021-12-17 21:04:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11776 states to 11776 states and 18653 transitions. [2021-12-17 21:04:19,222 INFO L78 Accepts]: Start accepts. Automaton has 11776 states and 18653 transitions. Word has length 179 [2021-12-17 21:04:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:19,222 INFO L470 AbstractCegarLoop]: Abstraction has 11776 states and 18653 transitions. [2021-12-17 21:04:19,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 11776 states and 18653 transitions. [2021-12-17 21:04:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:04:19,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:19,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:19,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:04:19,228 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1039932968, now seen corresponding path program 1 times [2021-12-17 21:04:19,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:19,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706129368] [2021-12-17 21:04:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:19,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:19,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:19,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:19,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:19,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:19,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:19,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:19,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706129368] [2021-12-17 21:04:19,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706129368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:19,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:19,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:19,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888789313] [2021-12-17 21:04:19,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:19,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:19,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:19,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:19,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:19,336 INFO L87 Difference]: Start difference. First operand 11776 states and 18653 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:23,528 INFO L93 Difference]: Finished difference Result 42736 states and 68515 transitions. [2021-12-17 21:04:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:23,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:04:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:23,632 INFO L225 Difference]: With dead ends: 42736 [2021-12-17 21:04:23,633 INFO L226 Difference]: Without dead ends: 30981 [2021-12-17 21:04:23,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:23,673 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1677 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:23,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1696 Valid, 2062 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 21:04:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30981 states. [2021-12-17 21:04:24,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30981 to 23205. [2021-12-17 21:04:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23205 states, 21378 states have (on average 1.5648797829544392) internal successors, (33454), 21444 states have internal predecessors, (33454), 1372 states have call successors, (1372), 391 states have call predecessors, (1372), 454 states have return successors, (2163), 1433 states have call predecessors, (2163), 1370 states have call successors, (2163) [2021-12-17 21:04:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23205 states to 23205 states and 36989 transitions. [2021-12-17 21:04:25,065 INFO L78 Accepts]: Start accepts. Automaton has 23205 states and 36989 transitions. Word has length 179 [2021-12-17 21:04:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:25,065 INFO L470 AbstractCegarLoop]: Abstraction has 23205 states and 36989 transitions. [2021-12-17 21:04:25,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 23205 states and 36989 transitions. [2021-12-17 21:04:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:04:25,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:25,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:25,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:04:25,076 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:25,076 INFO L85 PathProgramCache]: Analyzing trace with hash 775285478, now seen corresponding path program 1 times [2021-12-17 21:04:25,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:25,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608231843] [2021-12-17 21:04:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:25,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:25,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:25,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:25,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:25,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:25,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:25,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608231843] [2021-12-17 21:04:25,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608231843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:25,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:25,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:25,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168099893] [2021-12-17 21:04:25,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:25,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:25,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:25,184 INFO L87 Difference]: Start difference. First operand 23205 states and 36989 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:31,256 INFO L93 Difference]: Finished difference Result 84411 states and 136161 transitions. [2021-12-17 21:04:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:04:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:31,556 INFO L225 Difference]: With dead ends: 84411 [2021-12-17 21:04:31,556 INFO L226 Difference]: Without dead ends: 61227 [2021-12-17 21:04:31,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:31,604 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 1570 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:31,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 2965 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3011 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 21:04:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61227 states. [2021-12-17 21:04:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61227 to 46126. [2021-12-17 21:04:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46126 states, 42507 states have (on average 1.5643541063824782) internal successors, (66496), 42637 states have internal predecessors, (66496), 2716 states have call successors, (2716), 775 states have call predecessors, (2716), 902 states have return successors, (5029), 2841 states have call predecessors, (5029), 2714 states have call successors, (5029) [2021-12-17 21:04:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46126 states to 46126 states and 74241 transitions. [2021-12-17 21:04:34,385 INFO L78 Accepts]: Start accepts. Automaton has 46126 states and 74241 transitions. Word has length 179 [2021-12-17 21:04:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:34,385 INFO L470 AbstractCegarLoop]: Abstraction has 46126 states and 74241 transitions. [2021-12-17 21:04:34,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 46126 states and 74241 transitions. [2021-12-17 21:04:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:04:34,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:34,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:34,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:04:34,405 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1588556184, now seen corresponding path program 1 times [2021-12-17 21:04:34,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:34,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185958959] [2021-12-17 21:04:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:34,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:34,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:34,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:34,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:34,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:34,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:34,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185958959] [2021-12-17 21:04:34,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185958959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:34,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:34,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:34,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81526235] [2021-12-17 21:04:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:34,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:34,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:34,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:34,529 INFO L87 Difference]: Start difference. First operand 46126 states and 74241 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:44,962 INFO L93 Difference]: Finished difference Result 167762 states and 273303 transitions. [2021-12-17 21:04:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:44,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:04:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:45,433 INFO L225 Difference]: With dead ends: 167762 [2021-12-17 21:04:45,433 INFO L226 Difference]: Without dead ends: 121657 [2021-12-17 21:04:45,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:45,570 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 1569 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 2960 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:45,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 2960 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:04:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121657 states. [2021-12-17 21:04:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121657 to 92095. [2021-12-17 21:04:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92095 states, 84892 states have (on average 1.5639871837157802) internal successors, (132770), 85150 states have internal predecessors, (132770), 5404 states have call successors, (5404), 1543 states have call predecessors, (5404), 1798 states have return successors, (12219), 5657 states have call predecessors, (12219), 5402 states have call successors, (12219) [2021-12-17 21:04:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92095 states to 92095 states and 150393 transitions. [2021-12-17 21:04:51,810 INFO L78 Accepts]: Start accepts. Automaton has 92095 states and 150393 transitions. Word has length 179 [2021-12-17 21:04:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:51,810 INFO L470 AbstractCegarLoop]: Abstraction has 92095 states and 150393 transitions. [2021-12-17 21:04:51,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:04:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 92095 states and 150393 transitions. [2021-12-17 21:04:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:04:51,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:51,844 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:04:51,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:04:51,845 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:51,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1383232166, now seen corresponding path program 1 times [2021-12-17 21:04:51,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:51,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102165290] [2021-12-17 21:04:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:51,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:51,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:51,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:51,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:51,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:51,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:51,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:51,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102165290] [2021-12-17 21:04:51,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102165290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:51,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:51,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:51,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327937895] [2021-12-17 21:04:51,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:51,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:51,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:51,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:51,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:51,944 INFO L87 Difference]: Start difference. First operand 92095 states and 150393 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:05:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:01,621 INFO L93 Difference]: Finished difference Result 215603 states and 359386 transitions. [2021-12-17 21:05:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:05:01,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:05:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:02,068 INFO L225 Difference]: With dead ends: 215603 [2021-12-17 21:05:02,069 INFO L226 Difference]: Without dead ends: 123529 [2021-12-17 21:05:02,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:05:02,276 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 1133 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:02,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1580 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:05:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123529 states.