./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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.05.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2468c605d5c29b15a54525a5c6944fa0a2b4d36426cacd5fefa10555cb2b8a7a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:10:24,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:10:24,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:10:24,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:10:24,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:10:24,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:10:24,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:10:25,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:10:25,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:10:25,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:10:25,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:10:25,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:10:25,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:10:25,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:10:25,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:10:25,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:10:25,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:10:25,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:10:25,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:10:25,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:10:25,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:10:25,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:10:25,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:10:25,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:10:25,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:10:25,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:10:25,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:10:25,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:10:25,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:10:25,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:10:25,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:10:25,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:10:25,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:10:25,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:10:25,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:10:25,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:10:25,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:10:25,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:10:25,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:10:25,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:10:25,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:10:25,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:10:25,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:10:25,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:10:25,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:10:25,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:10:25,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:10:25,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:10:25,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:10:25,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:10:25,088 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:10:25,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:10:25,089 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:10:25,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:10:25,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:10:25,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:10:25,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:10:25,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:10:25,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:10:25,090 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:10:25,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:10:25,090 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:10:25,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:10:25,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:10:25,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:10:25,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:10:25,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:10:25,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:10:25,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:10:25,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:10:25,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:10:25,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:10:25,093 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:10:25,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:10:25,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:10:25,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:10:25,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2468c605d5c29b15a54525a5c6944fa0a2b4d36426cacd5fefa10555cb2b8a7a [2021-12-22 13:10:25,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:10:25,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:10:25,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:10:25,338 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:10:25,338 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:10:25,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2021-12-22 13:10:25,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7271d5855/c1633ee95e0b40afbf5bacd9dec47834/FLAG3fcbcbb4e [2021-12-22 13:10:25,789 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:10:25,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2021-12-22 13:10:25,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7271d5855/c1633ee95e0b40afbf5bacd9dec47834/FLAG3fcbcbb4e [2021-12-22 13:10:25,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7271d5855/c1633ee95e0b40afbf5bacd9dec47834 [2021-12-22 13:10:25,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:10:25,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:10:25,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:10:25,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:10:25,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:10:25,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:25" (1/1) ... [2021-12-22 13:10:25,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7edcc949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:25, skipping insertion in model container [2021-12-22 13:10:25,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:25" (1/1) ... [2021-12-22 13:10:25,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:10:25,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:10:26,073 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.05.cil-2.c[913,926] [2021-12-22 13:10:26,131 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.05.cil-2.c[5977,5990] [2021-12-22 13:10:26,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:10:26,221 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:10:26,233 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.05.cil-2.c[913,926] [2021-12-22 13:10:26,256 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.05.cil-2.c[5977,5990] [2021-12-22 13:10:26,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:10:26,328 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:10:26,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26 WrapperNode [2021-12-22 13:10:26,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:10:26,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:10:26,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:10:26,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:10:26,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (1/1) ... [2021-12-22 13:10:26,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (1/1) ... [2021-12-22 13:10:26,416 INFO L137 Inliner]: procedures = 58, calls = 64, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 654 [2021-12-22 13:10:26,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:10:26,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:10:26,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:10:26,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:10:26,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (1/1) ... [2021-12-22 13:10:26,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (1/1) ... [2021-12-22 13:10:26,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (1/1) ... [2021-12-22 13:10:26,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (1/1) ... [2021-12-22 13:10:26,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (1/1) ... [2021-12-22 13:10:26,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (1/1) ... [2021-12-22 13:10:26,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (1/1) ... [2021-12-22 13:10:26,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:10:26,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:10:26,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:10:26,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:10:26,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (1/1) ... [2021-12-22 13:10:26,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:10:26,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:26,507 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) [2021-12-22 13:10:26,515 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 [2021-12-22 13:10:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:10:26,540 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:10:26,540 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:10:26,540 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-22 13:10:26,542 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-22 13:10:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:10:26,542 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:10:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:10:26,542 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:10:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:10:26,542 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:10:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:10:26,542 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:10:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:10:26,542 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:10:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:10:26,542 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:10:26,542 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:10:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:10:26,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:10:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:10:26,543 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:10:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-22 13:10:26,543 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-22 13:10:26,683 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:10:26,700 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:10:27,274 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:10:27,282 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:10:27,282 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-12-22 13:10:27,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:10:27 BoogieIcfgContainer [2021-12-22 13:10:27,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:10:27,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:10:27,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:10:27,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:10:27,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:10:25" (1/3) ... [2021-12-22 13:10:27,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62106176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:10:27, skipping insertion in model container [2021-12-22 13:10:27,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:26" (2/3) ... [2021-12-22 13:10:27,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62106176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:10:27, skipping insertion in model container [2021-12-22 13:10:27,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:10:27" (3/3) ... [2021-12-22 13:10:27,292 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2021-12-22 13:10:27,297 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:10:27,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:10:27,338 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:10:27,344 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 [2021-12-22 13:10:27,344 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:10:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 247 states have (on average 1.6153846153846154) internal successors, (399), 254 states have internal predecessors, (399), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-22 13:10:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 13:10:27,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:27,371 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] [2021-12-22 13:10:27,371 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:27,376 INFO L85 PathProgramCache]: Analyzing trace with hash -335189264, now seen corresponding path program 1 times [2021-12-22 13:10:27,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:27,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160982533] [2021-12-22 13:10:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:27,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-22 13:10:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:27,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160982533] [2021-12-22 13:10:27,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160982533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:27,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:27,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:27,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571566411] [2021-12-22 13:10:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:27,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:27,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:27,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:27,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:27,651 INFO L87 Difference]: Start difference. First operand has 287 states, 247 states have (on average 1.6153846153846154) internal successors, (399), 254 states have internal predecessors, (399), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 13:10:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:27,964 INFO L93 Difference]: Finished difference Result 625 states and 988 transitions. [2021-12-22 13:10:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:27,967 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 [2021-12-22 13:10:27,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:27,978 INFO L225 Difference]: With dead ends: 625 [2021-12-22 13:10:27,979 INFO L226 Difference]: Without dead ends: 346 [2021-12-22 13:10:27,983 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 [2021-12-22 13:10:27,986 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 537 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:27,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 728 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:10:28,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-22 13:10:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 340. [2021-12-22 13:10:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 296 states have (on average 1.4864864864864864) internal successors, (440), 301 states have internal predecessors, (440), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2021-12-22 13:10:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 504 transitions. [2021-12-22 13:10:28,046 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 504 transitions. Word has length 44 [2021-12-22 13:10:28,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:28,046 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 504 transitions. [2021-12-22 13:10:28,047 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) [2021-12-22 13:10:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 504 transitions. [2021-12-22 13:10:28,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 13:10:28,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:28,050 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] [2021-12-22 13:10:28,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:10:28,050 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:28,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1892579596, now seen corresponding path program 1 times [2021-12-22 13:10:28,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:28,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310945803] [2021-12-22 13:10:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:28,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:10:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:28,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:28,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310945803] [2021-12-22 13:10:28,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310945803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:28,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:28,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:28,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698177890] [2021-12-22 13:10:28,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:28,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:28,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:28,138 INFO L87 Difference]: Start difference. First operand 340 states and 504 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) [2021-12-22 13:10:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:28,429 INFO L93 Difference]: Finished difference Result 588 states and 844 transitions. [2021-12-22 13:10:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:28,434 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 [2021-12-22 13:10:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:28,442 INFO L225 Difference]: With dead ends: 588 [2021-12-22 13:10:28,443 INFO L226 Difference]: Without dead ends: 464 [2021-12-22 13:10:28,447 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 [2021-12-22 13:10:28,449 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 229 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:28,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 941 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:10:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-22 13:10:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 407. [2021-12-22 13:10:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 357 states have (on average 1.4677871148459383) internal successors, (524), 362 states have internal predecessors, (524), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2021-12-22 13:10:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 594 transitions. [2021-12-22 13:10:28,485 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 594 transitions. Word has length 45 [2021-12-22 13:10:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:28,486 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 594 transitions. [2021-12-22 13:10:28,486 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) [2021-12-22 13:10:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 594 transitions. [2021-12-22 13:10:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 13:10:28,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:28,502 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] [2021-12-22 13:10:28,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:10:28,502 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:28,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1118030239, now seen corresponding path program 1 times [2021-12-22 13:10:28,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:28,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139924381] [2021-12-22 13:10:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:28,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:10:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:28,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:28,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139924381] [2021-12-22 13:10:28,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139924381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:28,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:28,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:28,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524050822] [2021-12-22 13:10:28,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:28,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:28,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:28,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:28,615 INFO L87 Difference]: Start difference. First operand 407 states and 594 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) [2021-12-22 13:10:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:28,785 INFO L93 Difference]: Finished difference Result 815 states and 1153 transitions. [2021-12-22 13:10:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:28,786 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 [2021-12-22 13:10:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:28,792 INFO L225 Difference]: With dead ends: 815 [2021-12-22 13:10:28,792 INFO L226 Difference]: Without dead ends: 624 [2021-12-22 13:10:28,795 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 [2021-12-22 13:10:28,801 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 546 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:28,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 725 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:10:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-12-22 13:10:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 572. [2021-12-22 13:10:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 503 states have (on average 1.41948310139165) internal successors, (714), 511 states have internal predecessors, (714), 45 states have call successors, (45), 22 states have call predecessors, (45), 22 states have return successors, (53), 39 states have call predecessors, (53), 41 states have call successors, (53) [2021-12-22 13:10:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 812 transitions. [2021-12-22 13:10:28,867 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 812 transitions. Word has length 45 [2021-12-22 13:10:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:28,868 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 812 transitions. [2021-12-22 13:10:28,868 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) [2021-12-22 13:10:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 812 transitions. [2021-12-22 13:10:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 13:10:28,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:28,871 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] [2021-12-22 13:10:28,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:10:28,872 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1874322656, now seen corresponding path program 1 times [2021-12-22 13:10:28,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:28,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499560597] [2021-12-22 13:10:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:28,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:10:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:10:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:10:28,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:28,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499560597] [2021-12-22 13:10:28,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499560597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:28,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:28,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:28,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455714193] [2021-12-22 13:10:28,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:28,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:28,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:28,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:28,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:28,968 INFO L87 Difference]: Start difference. First operand 572 states and 812 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) [2021-12-22 13:10:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:29,232 INFO L93 Difference]: Finished difference Result 1156 states and 1597 transitions. [2021-12-22 13:10:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:29,233 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 [2021-12-22 13:10:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:29,237 INFO L225 Difference]: With dead ends: 1156 [2021-12-22 13:10:29,238 INFO L226 Difference]: Without dead ends: 800 [2021-12-22 13:10:29,239 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 [2021-12-22 13:10:29,240 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 213 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:29,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 975 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:10:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-12-22 13:10:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 762. [2021-12-22 13:10:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 669 states have (on average 1.3662182361733932) internal successors, (914), 679 states have internal predecessors, (914), 59 states have call successors, (59), 30 states have call predecessors, (59), 32 states have return successors, (77), 53 states have call predecessors, (77), 55 states have call successors, (77) [2021-12-22 13:10:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1050 transitions. [2021-12-22 13:10:29,275 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1050 transitions. Word has length 62 [2021-12-22 13:10:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:29,276 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1050 transitions. [2021-12-22 13:10:29,276 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) [2021-12-22 13:10:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1050 transitions. [2021-12-22 13:10:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 13:10:29,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:29,278 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] [2021-12-22 13:10:29,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:10:29,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:29,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1000568822, now seen corresponding path program 1 times [2021-12-22 13:10:29,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:29,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407847435] [2021-12-22 13:10:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:29,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:29,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:29,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:10:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:29,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:10:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 13:10:29,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:29,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407847435] [2021-12-22 13:10:29,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407847435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:29,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:29,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:29,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625584767] [2021-12-22 13:10:29,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:29,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:29,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:29,338 INFO L87 Difference]: Start difference. First operand 762 states and 1050 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) [2021-12-22 13:10:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:29,481 INFO L93 Difference]: Finished difference Result 1415 states and 1903 transitions. [2021-12-22 13:10:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:29,482 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 [2021-12-22 13:10:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:29,487 INFO L225 Difference]: With dead ends: 1415 [2021-12-22 13:10:29,487 INFO L226 Difference]: Without dead ends: 961 [2021-12-22 13:10:29,489 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 [2021-12-22 13:10:29,490 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 533 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:29,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 722 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:10:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2021-12-22 13:10:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 906. [2021-12-22 13:10:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 797 states have (on average 1.3362609786700126) internal successors, (1065), 809 states have internal predecessors, (1065), 67 states have call successors, (67), 36 states have call predecessors, (67), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2021-12-22 13:10:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1223 transitions. [2021-12-22 13:10:29,535 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1223 transitions. Word has length 67 [2021-12-22 13:10:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:29,535 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 1223 transitions. [2021-12-22 13:10:29,536 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) [2021-12-22 13:10:29,536 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1223 transitions. [2021-12-22 13:10:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:10:29,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:29,538 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] [2021-12-22 13:10:29,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:10:29,539 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:29,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2083316816, now seen corresponding path program 1 times [2021-12-22 13:10:29,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:29,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941525267] [2021-12-22 13:10:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:29,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:29,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:29,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:29,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:10:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:10:29,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:29,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941525267] [2021-12-22 13:10:29,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941525267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:29,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110052795] [2021-12-22 13:10:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:29,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:29,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:29,639 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) [2021-12-22 13:10:29,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:10:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:29,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:10:29,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:29,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:10:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:10:30,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110052795] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:30,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:10:30,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-22 13:10:30,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561129214] [2021-12-22 13:10:30,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:30,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:30,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:30,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:30,083 INFO L87 Difference]: Start difference. First operand 906 states and 1223 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) [2021-12-22 13:10:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:30,213 INFO L93 Difference]: Finished difference Result 962 states and 1291 transitions. [2021-12-22 13:10:30,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:10:30,214 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 [2021-12-22 13:10:30,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:30,218 INFO L225 Difference]: With dead ends: 962 [2021-12-22 13:10:30,219 INFO L226 Difference]: Without dead ends: 959 [2021-12-22 13:10:30,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:10:30,220 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 733 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:30,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 505 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:10:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-12-22 13:10:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 905. [2021-12-22 13:10:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 797 states have (on average 1.3337515683814303) internal successors, (1063), 808 states have internal predecessors, (1063), 66 states have call successors, (66), 36 states have call predecessors, (66), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2021-12-22 13:10:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1220 transitions. [2021-12-22 13:10:30,259 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1220 transitions. Word has length 68 [2021-12-22 13:10:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:30,260 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1220 transitions. [2021-12-22 13:10:30,260 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) [2021-12-22 13:10:30,260 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1220 transitions. [2021-12-22 13:10:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:10:30,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:30,263 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] [2021-12-22 13:10:30,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:30,479 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 [2021-12-22 13:10:30,480 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash -159219143, now seen corresponding path program 1 times [2021-12-22 13:10:30,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:30,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2677761] [2021-12-22 13:10:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:30,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:10:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:10:30,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2677761] [2021-12-22 13:10:30,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2677761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354091532] [2021-12-22 13:10:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:30,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:30,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:30,592 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) [2021-12-22 13:10:30,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:10:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:10:30,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:31,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:10:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:10:31,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354091532] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:10:31,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:10:31,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-22 13:10:31,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538449678] [2021-12-22 13:10:31,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:10:31,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:10:31,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:31,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:10:31,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:10:31,155 INFO L87 Difference]: Start difference. First operand 905 states and 1220 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) [2021-12-22 13:10:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:32,445 INFO L93 Difference]: Finished difference Result 2605 states and 3440 transitions. [2021-12-22 13:10:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 13:10:32,445 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 [2021-12-22 13:10:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:32,454 INFO L225 Difference]: With dead ends: 2605 [2021-12-22 13:10:32,454 INFO L226 Difference]: Without dead ends: 2061 [2021-12-22 13:10:32,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 13:10:32,458 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 890 mSDsluCounter, 2596 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:32,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 3139 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:10:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-12-22 13:10:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1294. [2021-12-22 13:10:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1147 states have (on average 1.3051438535309503) internal successors, (1497), 1166 states have internal predecessors, (1497), 86 states have call successors, (86), 50 states have call predecessors, (86), 59 states have return successors, (125), 78 states have call predecessors, (125), 83 states have call successors, (125) [2021-12-22 13:10:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1708 transitions. [2021-12-22 13:10:32,533 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1708 transitions. Word has length 69 [2021-12-22 13:10:32,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:32,533 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 1708 transitions. [2021-12-22 13:10:32,533 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) [2021-12-22 13:10:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1708 transitions. [2021-12-22 13:10:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-22 13:10:32,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:32,537 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] [2021-12-22 13:10:32,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:32,759 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 [2021-12-22 13:10:32,760 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:32,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1275467893, now seen corresponding path program 1 times [2021-12-22 13:10:32,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:32,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779101564] [2021-12-22 13:10:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:32,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:32,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:32,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:32,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:10:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:32,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:10:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 13:10:32,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:32,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779101564] [2021-12-22 13:10:32,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779101564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:32,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655939172] [2021-12-22 13:10:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:32,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:32,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:32,847 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) [2021-12-22 13:10:32,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:10:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:32,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:10:32,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:10:33,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:33,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655939172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:33,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:33,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-22 13:10:33,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132745323] [2021-12-22 13:10:33,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:33,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:33,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:33,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:33,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:33,099 INFO L87 Difference]: Start difference. First operand 1294 states and 1708 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) [2021-12-22 13:10:33,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:33,176 INFO L93 Difference]: Finished difference Result 2017 states and 2646 transitions. [2021-12-22 13:10:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:33,176 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 [2021-12-22 13:10:33,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:33,182 INFO L225 Difference]: With dead ends: 2017 [2021-12-22 13:10:33,183 INFO L226 Difference]: Without dead ends: 1172 [2021-12-22 13:10:33,185 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 [2021-12-22 13:10:33,186 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 373 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 519 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 [2021-12-22 13:10:33,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 519 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:10:33,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-12-22 13:10:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1157. [2021-12-22 13:10:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1026 states have (on average 1.3050682261208577) internal successors, (1339), 1044 states have internal predecessors, (1339), 78 states have call successors, (78), 44 states have call predecessors, (78), 51 states have return successors, (111), 69 states have call predecessors, (111), 75 states have call successors, (111) [2021-12-22 13:10:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1528 transitions. [2021-12-22 13:10:33,241 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1528 transitions. Word has length 88 [2021-12-22 13:10:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:33,242 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 1528 transitions. [2021-12-22 13:10:33,242 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) [2021-12-22 13:10:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1528 transitions. [2021-12-22 13:10:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:10:33,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:33,246 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] [2021-12-22 13:10:33,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 13:10:33,467 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 [2021-12-22 13:10:33,468 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash -118977572, now seen corresponding path program 1 times [2021-12-22 13:10:33,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:33,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163442995] [2021-12-22 13:10:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:33,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:10:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:10:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:10:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:10:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:33,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:33,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163442995] [2021-12-22 13:10:33,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163442995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:33,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:33,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:33,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102065127] [2021-12-22 13:10:33,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:33,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:33,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:33,583 INFO L87 Difference]: Start difference. First operand 1157 states and 1528 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:35,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:35,161 INFO L93 Difference]: Finished difference Result 1694 states and 2384 transitions. [2021-12-22 13:10:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:35,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:10:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:35,168 INFO L225 Difference]: With dead ends: 1694 [2021-12-22 13:10:35,169 INFO L226 Difference]: Without dead ends: 1498 [2021-12-22 13:10:35,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:10:35,172 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 866 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:35,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1961 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 13:10:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-12-22 13:10:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1359. [2021-12-22 13:10:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1204 states have (on average 1.3446843853820598) internal successors, (1619), 1224 states have internal predecessors, (1619), 94 states have call successors, (94), 50 states have call predecessors, (94), 59 states have return successors, (134), 86 states have call predecessors, (134), 91 states have call successors, (134) [2021-12-22 13:10:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1847 transitions. [2021-12-22 13:10:35,260 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1847 transitions. Word has length 102 [2021-12-22 13:10:35,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:35,261 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 1847 transitions. [2021-12-22 13:10:35,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1847 transitions. [2021-12-22 13:10:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:10:35,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:35,265 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] [2021-12-22 13:10:35,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:10:35,266 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:35,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1757505246, now seen corresponding path program 1 times [2021-12-22 13:10:35,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:35,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121504580] [2021-12-22 13:10:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:35,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:10:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:10:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:10:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:10:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:35,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121504580] [2021-12-22 13:10:35,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121504580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:35,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:35,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:35,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782878769] [2021-12-22 13:10:35,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:35,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:35,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:35,368 INFO L87 Difference]: Start difference. First operand 1359 states and 1847 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:36,782 INFO L93 Difference]: Finished difference Result 2374 states and 3451 transitions. [2021-12-22 13:10:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:36,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:10:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:36,792 INFO L225 Difference]: With dead ends: 2374 [2021-12-22 13:10:36,793 INFO L226 Difference]: Without dead ends: 1978 [2021-12-22 13:10:36,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:10:36,795 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 868 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:36,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1864 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:10:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-22 13:10:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1731. [2021-12-22 13:10:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1534 states have (on average 1.3872229465449804) internal successors, (2128), 1556 states have internal predecessors, (2128), 122 states have call successors, (122), 62 states have call predecessors, (122), 73 states have return successors, (172), 116 states have call predecessors, (172), 119 states have call successors, (172) [2021-12-22 13:10:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2422 transitions. [2021-12-22 13:10:36,905 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2422 transitions. Word has length 102 [2021-12-22 13:10:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:36,906 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 2422 transitions. [2021-12-22 13:10:36,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2422 transitions. [2021-12-22 13:10:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:10:36,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:36,910 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] [2021-12-22 13:10:36,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:10:36,911 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:36,911 INFO L85 PathProgramCache]: Analyzing trace with hash -121625700, now seen corresponding path program 1 times [2021-12-22 13:10:36,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:36,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666301120] [2021-12-22 13:10:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:36,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:10:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:10:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:10:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:10:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:37,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:37,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666301120] [2021-12-22 13:10:37,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666301120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:37,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:37,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:37,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757786390] [2021-12-22 13:10:37,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:37,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:37,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:37,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:37,028 INFO L87 Difference]: Start difference. First operand 1731 states and 2422 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:37,850 INFO L93 Difference]: Finished difference Result 2749 states and 4045 transitions. [2021-12-22 13:10:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:10:37,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:10:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:37,862 INFO L225 Difference]: With dead ends: 2749 [2021-12-22 13:10:37,862 INFO L226 Difference]: Without dead ends: 1979 [2021-12-22 13:10:37,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:10:37,866 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 816 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:37,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 979 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:10:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-12-22 13:10:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1731. [2021-12-22 13:10:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1534 states have (on average 1.3839634941329857) internal successors, (2123), 1556 states have internal predecessors, (2123), 122 states have call successors, (122), 62 states have call predecessors, (122), 73 states have return successors, (172), 116 states have call predecessors, (172), 119 states have call successors, (172) [2021-12-22 13:10:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2417 transitions. [2021-12-22 13:10:38,015 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2417 transitions. Word has length 102 [2021-12-22 13:10:38,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:38,016 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 2417 transitions. [2021-12-22 13:10:38,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:38,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2417 transitions. [2021-12-22 13:10:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:10:38,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:38,020 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] [2021-12-22 13:10:38,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:10:38,021 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:38,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1203230494, now seen corresponding path program 1 times [2021-12-22 13:10:38,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:38,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269090149] [2021-12-22 13:10:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:38,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:10:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:10:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:10:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:10:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:38,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:38,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269090149] [2021-12-22 13:10:38,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269090149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:38,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:38,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:38,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081477862] [2021-12-22 13:10:38,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:38,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:38,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:38,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:38,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:38,120 INFO L87 Difference]: Start difference. First operand 1731 states and 2417 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:39,640 INFO L93 Difference]: Finished difference Result 3699 states and 5504 transitions. [2021-12-22 13:10:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:39,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:10:39,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:39,655 INFO L225 Difference]: With dead ends: 3699 [2021-12-22 13:10:39,656 INFO L226 Difference]: Without dead ends: 2931 [2021-12-22 13:10:39,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:10:39,661 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 865 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:39,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 1855 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:10:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2021-12-22 13:10:39,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2480. [2021-12-22 13:10:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2199 states have (on average 1.428831286948613) internal successors, (3142), 2225 states have internal predecessors, (3142), 178 states have call successors, (178), 86 states have call predecessors, (178), 101 states have return successors, (254), 176 states have call predecessors, (254), 175 states have call successors, (254) [2021-12-22 13:10:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 3574 transitions. [2021-12-22 13:10:39,846 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 3574 transitions. Word has length 102 [2021-12-22 13:10:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:39,846 INFO L470 AbstractCegarLoop]: Abstraction has 2480 states and 3574 transitions. [2021-12-22 13:10:39,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 3574 transitions. [2021-12-22 13:10:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:10:39,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:39,851 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] [2021-12-22 13:10:39,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:10:39,851 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:39,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:39,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1524978852, now seen corresponding path program 1 times [2021-12-22 13:10:39,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:39,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003279174] [2021-12-22 13:10:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:39,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:10:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:10:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:10:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:10:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:39,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003279174] [2021-12-22 13:10:39,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003279174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:39,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:39,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:39,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205549127] [2021-12-22 13:10:39,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:39,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:39,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:39,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:39,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:39,956 INFO L87 Difference]: Start difference. First operand 2480 states and 3574 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:41,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:41,648 INFO L93 Difference]: Finished difference Result 6356 states and 9661 transitions. [2021-12-22 13:10:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:41,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:10:41,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:41,674 INFO L225 Difference]: With dead ends: 6356 [2021-12-22 13:10:41,675 INFO L226 Difference]: Without dead ends: 4839 [2021-12-22 13:10:41,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:10:41,683 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 865 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1852 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:41,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 1852 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:10:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2021-12-22 13:10:41,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 3985. [2021-12-22 13:10:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3985 states, 3536 states have (on average 1.467760180995475) internal successors, (5190), 3570 states have internal predecessors, (5190), 290 states have call successors, (290), 134 states have call predecessors, (290), 157 states have return successors, (436), 296 states have call predecessors, (436), 287 states have call successors, (436) [2021-12-22 13:10:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 5916 transitions. [2021-12-22 13:10:41,928 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 5916 transitions. Word has length 102 [2021-12-22 13:10:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:41,928 INFO L470 AbstractCegarLoop]: Abstraction has 3985 states and 5916 transitions. [2021-12-22 13:10:41,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 5916 transitions. [2021-12-22 13:10:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:10:41,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:41,934 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] [2021-12-22 13:10:41,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:10:41,934 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1712150366, now seen corresponding path program 1 times [2021-12-22 13:10:41,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:41,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505971440] [2021-12-22 13:10:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:41,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:10:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:42,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:10:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:42,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:10:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:42,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:10:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:42,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:42,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505971440] [2021-12-22 13:10:42,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505971440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:42,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:42,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:42,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588107284] [2021-12-22 13:10:42,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:42,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:42,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:42,047 INFO L87 Difference]: Start difference. First operand 3985 states and 5916 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:44,048 INFO L93 Difference]: Finished difference Result 12933 states and 19923 transitions. [2021-12-22 13:10:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:10:44,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:10:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:44,106 INFO L225 Difference]: With dead ends: 12933 [2021-12-22 13:10:44,106 INFO L226 Difference]: Without dead ends: 9911 [2021-12-22 13:10:44,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:10:44,122 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1080 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:44,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1102 Valid, 1843 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:10:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9911 states. [2021-12-22 13:10:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9911 to 6962. [2021-12-22 13:10:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6193 states have (on average 1.4978201194897465) internal successors, (9276), 6243 states have internal predecessors, (9276), 498 states have call successors, (498), 230 states have call predecessors, (498), 269 states have return successors, (838), 520 states have call predecessors, (838), 495 states have call successors, (838) [2021-12-22 13:10:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 10612 transitions. [2021-12-22 13:10:44,648 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 10612 transitions. Word has length 102 [2021-12-22 13:10:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:44,649 INFO L470 AbstractCegarLoop]: Abstraction has 6962 states and 10612 transitions. [2021-12-22 13:10:44,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:44,650 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 10612 transitions. [2021-12-22 13:10:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:10:44,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:44,658 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] [2021-12-22 13:10:44,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:10:44,659 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash 569647900, now seen corresponding path program 1 times [2021-12-22 13:10:44,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:44,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224013426] [2021-12-22 13:10:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:44,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:10:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:10:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:10:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:10:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:44,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:44,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224013426] [2021-12-22 13:10:44,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224013426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:44,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:44,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:44,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162645991] [2021-12-22 13:10:44,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:44,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:44,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:44,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:44,768 INFO L87 Difference]: Start difference. First operand 6962 states and 10612 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:45,851 INFO L93 Difference]: Finished difference Result 14664 states and 22986 transitions. [2021-12-22 13:10:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:10:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:10:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:45,883 INFO L225 Difference]: With dead ends: 14664 [2021-12-22 13:10:45,883 INFO L226 Difference]: Without dead ends: 8663 [2021-12-22 13:10:45,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:10:45,903 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 818 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:45,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 962 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:10:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8663 states. [2021-12-22 13:10:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8663 to 6962. [2021-12-22 13:10:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6193 states have (on average 1.4924915226869047) internal successors, (9243), 6243 states have internal predecessors, (9243), 498 states have call successors, (498), 230 states have call predecessors, (498), 269 states have return successors, (838), 520 states have call predecessors, (838), 495 states have call successors, (838) [2021-12-22 13:10:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 10579 transitions. [2021-12-22 13:10:46,362 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 10579 transitions. Word has length 102 [2021-12-22 13:10:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:46,362 INFO L470 AbstractCegarLoop]: Abstraction has 6962 states and 10579 transitions. [2021-12-22 13:10:46,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 10579 transitions. [2021-12-22 13:10:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:10:46,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:46,391 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] [2021-12-22 13:10:46,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:10:46,392 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash 809887646, now seen corresponding path program 1 times [2021-12-22 13:10:46,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:46,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98086562] [2021-12-22 13:10:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:46,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:10:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:10:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:10:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:10:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:46,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:46,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98086562] [2021-12-22 13:10:46,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98086562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:46,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:46,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:46,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920009674] [2021-12-22 13:10:46,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:46,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:46,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:46,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:46,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:46,482 INFO L87 Difference]: Start difference. First operand 6962 states and 10579 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:48,901 INFO L93 Difference]: Finished difference Result 23366 states and 36411 transitions. [2021-12-22 13:10:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:10:48,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:10:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:48,966 INFO L225 Difference]: With dead ends: 23366 [2021-12-22 13:10:48,967 INFO L226 Difference]: Without dead ends: 17367 [2021-12-22 13:10:48,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:10:48,992 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 896 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:48,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 1871 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 13:10:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17367 states. [2021-12-22 13:10:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17367 to 12962. [2021-12-22 13:10:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12962 states, 11569 states have (on average 1.5119716483706458) internal successors, (17492), 11651 states have internal predecessors, (17492), 898 states have call successors, (898), 422 states have call predecessors, (898), 493 states have return successors, (1788), 952 states have call predecessors, (1788), 895 states have call successors, (1788) [2021-12-22 13:10:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12962 states to 12962 states and 20178 transitions. [2021-12-22 13:10:49,955 INFO L78 Accepts]: Start accepts. Automaton has 12962 states and 20178 transitions. Word has length 102 [2021-12-22 13:10:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:49,955 INFO L470 AbstractCegarLoop]: Abstraction has 12962 states and 20178 transitions. [2021-12-22 13:10:49,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 12962 states and 20178 transitions. [2021-12-22 13:10:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:10:49,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:49,968 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] [2021-12-22 13:10:49,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:10:49,968 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash 836953248, now seen corresponding path program 1 times [2021-12-22 13:10:49,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:49,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997866894] [2021-12-22 13:10:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:49,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:49,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:50,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:10:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:50,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:10:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:50,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:10:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:50,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:10:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:50,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:50,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997866894] [2021-12-22 13:10:50,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997866894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:50,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:50,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:50,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593013929] [2021-12-22 13:10:50,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:50,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:50,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:50,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:50,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:50,059 INFO L87 Difference]: Start difference. First operand 12962 states and 20178 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:53,098 INFO L93 Difference]: Finished difference Result 44566 states and 70622 transitions. [2021-12-22 13:10:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:10:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:10:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:53,255 INFO L225 Difference]: With dead ends: 44566 [2021-12-22 13:10:53,256 INFO L226 Difference]: Without dead ends: 32567 [2021-12-22 13:10:53,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:10:53,311 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 933 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:53,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [955 Valid, 1822 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:10:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32567 states. [2021-12-22 13:10:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32567 to 24930. [2021-12-22 13:10:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24930 states, 22321 states have (on average 1.5242148649254066) internal successors, (34022), 22467 states have internal predecessors, (34022), 1666 states have call successors, (1666), 806 states have call predecessors, (1666), 941 states have return successors, (4142), 1784 states have call predecessors, (4142), 1663 states have call successors, (4142) [2021-12-22 13:10:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24930 states to 24930 states and 39830 transitions. [2021-12-22 13:10:54,933 INFO L78 Accepts]: Start accepts. Automaton has 24930 states and 39830 transitions. Word has length 102 [2021-12-22 13:10:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:54,933 INFO L470 AbstractCegarLoop]: Abstraction has 24930 states and 39830 transitions. [2021-12-22 13:10:54,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:10:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 24930 states and 39830 transitions. [2021-12-22 13:10:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:10:54,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:54,951 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] [2021-12-22 13:10:54,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:10:54,952 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:54,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1240383650, now seen corresponding path program 1 times [2021-12-22 13:10:54,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:54,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649027379] [2021-12-22 13:10:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:54,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:54,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:54,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:10:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:55,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:10:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:55,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:10:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:55,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:10:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:55,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:55,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649027379] [2021-12-22 13:10:55,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649027379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:55,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:55,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:55,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342069232] [2021-12-22 13:10:55,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:55,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:55,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:55,035 INFO L87 Difference]: Start difference. First operand 24930 states and 39830 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:11:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:00,158 INFO L93 Difference]: Finished difference Result 85782 states and 139100 transitions. [2021-12-22 13:11:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:11:00,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:11:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:00,466 INFO L225 Difference]: With dead ends: 85782 [2021-12-22 13:11:00,467 INFO L226 Difference]: Without dead ends: 61815 [2021-12-22 13:11:00,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:11:00,560 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 895 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:00,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 1818 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:11:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61815 states. [2021-12-22 13:11:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61815 to 48802. [2021-12-22 13:11:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48802 states, 43825 states have (on average 1.5321391899600685) internal successors, (67146), 44099 states have internal predecessors, (67146), 3138 states have call successors, (3138), 1574 states have call predecessors, (3138), 1837 states have return successors, (10244), 3384 states have call predecessors, (10244), 3135 states have call successors, (10244) [2021-12-22 13:11:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48802 states to 48802 states and 80528 transitions. [2021-12-22 13:11:03,910 INFO L78 Accepts]: Start accepts. Automaton has 48802 states and 80528 transitions. Word has length 102 [2021-12-22 13:11:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:03,910 INFO L470 AbstractCegarLoop]: Abstraction has 48802 states and 80528 transitions. [2021-12-22 13:11:03,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2021-12-22 13:11:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 48802 states and 80528 transitions. [2021-12-22 13:11:03,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:11:03,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:03,945 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] [2021-12-22 13:11:03,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:11:03,945 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash 493720800, now seen corresponding path program 1 times [2021-12-22 13:11:03,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:03,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55955758] [2021-12-22 13:11:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:03,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:03,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:03,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:11:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:11:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:11:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:11:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:04,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:04,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55955758] [2021-12-22 13:11:04,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55955758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:04,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:04,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:11:04,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265931124] [2021-12-22 13:11:04,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:04,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:11:04,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:11:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:11:04,025 INFO L87 Difference]: Start difference. First operand 48802 states and 80528 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-12-22 13:11:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:12,636 INFO L93 Difference]: Finished difference Result 163812 states and 267994 transitions. [2021-12-22 13:11:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:11:12,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2021-12-22 13:11:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:13,236 INFO L225 Difference]: With dead ends: 163812 [2021-12-22 13:11:13,236 INFO L226 Difference]: Without dead ends: 115973 [2021-12-22 13:11:13,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:11:13,373 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 1113 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:13,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 1539 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:11:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115973 states.