./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 eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.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-?-eb692b5 [2022-07-19 20:29:05,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 20:29:05,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 20:29:05,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 20:29:05,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 20:29:05,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 20:29:05,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 20:29:05,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 20:29:05,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 20:29:05,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 20:29:05,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 20:29:05,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 20:29:05,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 20:29:05,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 20:29:05,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 20:29:05,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 20:29:06,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 20:29:06,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 20:29:06,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 20:29:06,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 20:29:06,006 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 20:29:06,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 20:29:06,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 20:29:06,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 20:29:06,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 20:29:06,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 20:29:06,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 20:29:06,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 20:29:06,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 20:29:06,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 20:29:06,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 20:29:06,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 20:29:06,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 20:29:06,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 20:29:06,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 20:29:06,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 20:29:06,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 20:29:06,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 20:29:06,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 20:29:06,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 20:29:06,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 20:29:06,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 20:29:06,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 20:29:06,044 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 20:29:06,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 20:29:06,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 20:29:06,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 20:29:06,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 20:29:06,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 20:29:06,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 20:29:06,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 20:29:06,048 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 20:29:06,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 20:29:06,049 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 20:29:06,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 20:29:06,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 20:29:06,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 20:29:06,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 20:29:06,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 20:29:06,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 20:29:06,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 20:29:06,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 20:29:06,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 20:29:06,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 20:29:06,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 20:29:06,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 20:29:06,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 20:29:06,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:29:06,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 20:29:06,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 20:29:06,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 20:29:06,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 20:29:06,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 20:29:06,053 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 20:29:06,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 20:29:06,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 20:29:06,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2468c605d5c29b15a54525a5c6944fa0a2b4d36426cacd5fefa10555cb2b8a7a [2022-07-19 20:29:06,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 20:29:06,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 20:29:06,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 20:29:06,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 20:29:06,286 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 20:29:06,287 INFO L432 ainManager$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 [2022-07-19 20:29:06,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c25d9106f/1d366146c05c4722ad80bf4e0c106fab/FLAG92654ac3f [2022-07-19 20:29:06,722 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 20:29:06,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2022-07-19 20:29:06,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c25d9106f/1d366146c05c4722ad80bf4e0c106fab/FLAG92654ac3f [2022-07-19 20:29:07,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c25d9106f/1d366146c05c4722ad80bf4e0c106fab [2022-07-19 20:29:07,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 20:29:07,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 20:29:07,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 20:29:07,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 20:29:07,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 20:29:07,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250def8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07, skipping insertion in model container [2022-07-19 20:29:07,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 20:29:07,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 20:29:07,297 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] [2022-07-19 20:29:07,333 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] [2022-07-19 20:29:07,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:29:07,412 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 20:29:07,421 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] [2022-07-19 20:29:07,445 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] [2022-07-19 20:29:07,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:29:07,492 INFO L208 MainTranslator]: Completed translation [2022-07-19 20:29:07,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07 WrapperNode [2022-07-19 20:29:07,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 20:29:07,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 20:29:07,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 20:29:07,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 20:29:07,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,544 INFO L137 Inliner]: procedures = 58, calls = 64, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 654 [2022-07-19 20:29:07,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 20:29:07,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 20:29:07,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 20:29:07,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 20:29:07,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 20:29:07,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 20:29:07,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 20:29:07,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 20:29:07,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (1/1) ... [2022-07-19 20:29:07,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:29:07,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:07,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 20:29:07,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 20:29:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 20:29:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-19 20:29:07,667 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-19 20:29:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-19 20:29:07,667 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-19 20:29:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-19 20:29:07,667 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-19 20:29:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-19 20:29:07,667 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-19 20:29:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-19 20:29:07,667 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-19 20:29:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-19 20:29:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-19 20:29:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-19 20:29:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-19 20:29:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 20:29:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-19 20:29:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-19 20:29:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 20:29:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 20:29:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-19 20:29:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-19 20:29:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-19 20:29:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-19 20:29:07,738 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 20:29:07,739 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 20:29:08,128 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 20:29:08,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 20:29:08,136 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2022-07-19 20:29:08,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:29:08 BoogieIcfgContainer [2022-07-19 20:29:08,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 20:29:08,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 20:29:08,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 20:29:08,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 20:29:08,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:29:07" (1/3) ... [2022-07-19 20:29:08,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a212c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:29:08, skipping insertion in model container [2022-07-19 20:29:08,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:07" (2/3) ... [2022-07-19 20:29:08,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a212c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:29:08, skipping insertion in model container [2022-07-19 20:29:08,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:29:08" (3/3) ... [2022-07-19 20:29:08,143 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2022-07-19 20:29:08,153 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 20:29:08,154 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 20:29:08,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:29:08,190 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e730efb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@12851313 [2022-07-19 20:29:08,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:29:08,193 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) [2022-07-19 20:29:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 20:29:08,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:08,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:08,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash -335189264, now seen corresponding path program 1 times [2022-07-19 20:29:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:08,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478101244] [2022-07-19 20:29:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:08,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 20:29:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:08,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:08,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478101244] [2022-07-19 20:29:08,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478101244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:08,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:08,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:08,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203071946] [2022-07-19 20:29:08,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:08,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:08,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:08,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:08,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:08,465 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) [2022-07-19 20:29:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:08,734 INFO L93 Difference]: Finished difference Result 625 states and 988 transitions. [2022-07-19 20:29:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-07-19 20:29:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:08,748 INFO L225 Difference]: With dead ends: 625 [2022-07-19 20:29:08,748 INFO L226 Difference]: Without dead ends: 346 [2022-07-19 20:29:08,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:08,755 INFO L413 NwaCegarLoop]: 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 [2022-07-19 20:29:08,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 728 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 20:29:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-07-19 20:29:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 340. [2022-07-19 20:29:08,818 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) [2022-07-19 20:29:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 504 transitions. [2022-07-19 20:29:08,821 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 504 transitions. Word has length 44 [2022-07-19 20:29:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:08,822 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 504 transitions. [2022-07-19 20:29:08,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:29:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 504 transitions. [2022-07-19 20:29:08,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 20:29:08,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:08,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:08,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 20:29:08,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:08,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1892579596, now seen corresponding path program 1 times [2022-07-19 20:29:08,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:08,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309598600] [2022-07-19 20:29:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:08,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 20:29:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:08,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:08,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309598600] [2022-07-19 20:29:08,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309598600] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:08,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:08,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:08,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438240283] [2022-07-19 20:29:08,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:08,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:08,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:08,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:08,898 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) [2022-07-19 20:29:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:09,142 INFO L93 Difference]: Finished difference Result 588 states and 844 transitions. [2022-07-19 20:29:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-19 20:29:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:09,145 INFO L225 Difference]: With dead ends: 588 [2022-07-19 20:29:09,145 INFO L226 Difference]: Without dead ends: 464 [2022-07-19 20:29:09,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:09,147 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 229 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:09,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 920 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 20:29:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-07-19 20:29:09,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 407. [2022-07-19 20:29:09,164 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) [2022-07-19 20:29:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 594 transitions. [2022-07-19 20:29:09,166 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 594 transitions. Word has length 45 [2022-07-19 20:29:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:09,166 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 594 transitions. [2022-07-19 20:29:09,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:29:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 594 transitions. [2022-07-19 20:29:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 20:29:09,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:09,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:09,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 20:29:09,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1118030239, now seen corresponding path program 1 times [2022-07-19 20:29:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:09,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556847332] [2022-07-19 20:29:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:09,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 20:29:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:09,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:09,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556847332] [2022-07-19 20:29:09,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556847332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:09,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:09,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:09,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473393283] [2022-07-19 20:29:09,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:09,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:09,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:09,221 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) [2022-07-19 20:29:09,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:09,329 INFO L93 Difference]: Finished difference Result 815 states and 1153 transitions. [2022-07-19 20:29:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:09,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-19 20:29:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:09,332 INFO L225 Difference]: With dead ends: 815 [2022-07-19 20:29:09,332 INFO L226 Difference]: Without dead ends: 624 [2022-07-19 20:29:09,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:09,334 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 546 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:09,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 723 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-07-19 20:29:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 572. [2022-07-19 20:29:09,366 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) [2022-07-19 20:29:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 812 transitions. [2022-07-19 20:29:09,369 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 812 transitions. Word has length 45 [2022-07-19 20:29:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:09,369 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 812 transitions. [2022-07-19 20:29:09,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:29:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 812 transitions. [2022-07-19 20:29:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 20:29:09,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:09,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:09,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 20:29:09,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:09,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1874322656, now seen corresponding path program 1 times [2022-07-19 20:29:09,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:09,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887901441] [2022-07-19 20:29:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:09,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 20:29:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 20:29:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:09,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887901441] [2022-07-19 20:29:09,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887901441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:09,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:09,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:09,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900400670] [2022-07-19 20:29:09,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:09,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:09,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:09,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:09,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:09,421 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) [2022-07-19 20:29:09,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:09,648 INFO L93 Difference]: Finished difference Result 1156 states and 1597 transitions. [2022-07-19 20:29:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:09,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-07-19 20:29:09,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:09,652 INFO L225 Difference]: With dead ends: 1156 [2022-07-19 20:29:09,652 INFO L226 Difference]: Without dead ends: 800 [2022-07-19 20:29:09,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:09,654 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 213 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-19 20:29:09,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 975 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 20:29:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-07-19 20:29:09,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 762. [2022-07-19 20:29:09,675 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) [2022-07-19 20:29:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1050 transitions. [2022-07-19 20:29:09,679 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1050 transitions. Word has length 62 [2022-07-19 20:29:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:09,679 INFO L495 AbstractCegarLoop]: Abstraction has 762 states and 1050 transitions. [2022-07-19 20:29:09,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 20:29:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1050 transitions. [2022-07-19 20:29:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 20:29:09,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:09,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:09,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 20:29:09,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1000568822, now seen corresponding path program 1 times [2022-07-19 20:29:09,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:09,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642700883] [2022-07-19 20:29:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:09,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 20:29:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 20:29:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 20:29:09,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:09,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642700883] [2022-07-19 20:29:09,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642700883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:09,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:09,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:09,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229349404] [2022-07-19 20:29:09,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:09,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:09,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:09,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:09,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:09,729 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) [2022-07-19 20:29:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:09,835 INFO L93 Difference]: Finished difference Result 1415 states and 1903 transitions. [2022-07-19 20:29:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-07-19 20:29:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:09,839 INFO L225 Difference]: With dead ends: 1415 [2022-07-19 20:29:09,839 INFO L226 Difference]: Without dead ends: 961 [2022-07-19 20:29:09,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:09,841 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 533 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:09,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 720 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-07-19 20:29:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 906. [2022-07-19 20:29:09,894 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) [2022-07-19 20:29:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1223 transitions. [2022-07-19 20:29:09,897 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1223 transitions. Word has length 67 [2022-07-19 20:29:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:09,897 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1223 transitions. [2022-07-19 20:29:09,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 20:29:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1223 transitions. [2022-07-19 20:29:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 20:29:09,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:09,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:09,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 20:29:09,900 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:09,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2083316816, now seen corresponding path program 1 times [2022-07-19 20:29:09,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:09,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289839235] [2022-07-19 20:29:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:09,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:29:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:29:09,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:09,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289839235] [2022-07-19 20:29:09,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289839235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:09,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305388998] [2022-07-19 20:29:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:09,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:09,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:09,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:09,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 20:29:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 20:29:10,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:10,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:29:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:29:10,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305388998] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:10,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 20:29:10,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-19 20:29:10,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397729860] [2022-07-19 20:29:10,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:10,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:10,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:10,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:10,168 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) [2022-07-19 20:29:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:10,260 INFO L93 Difference]: Finished difference Result 962 states and 1291 transitions. [2022-07-19 20:29:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:29:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-07-19 20:29:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:10,264 INFO L225 Difference]: With dead ends: 962 [2022-07-19 20:29:10,264 INFO L226 Difference]: Without dead ends: 959 [2022-07-19 20:29:10,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:29:10,265 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 733 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-07-19 20:29:10,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 505 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-07-19 20:29:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 905. [2022-07-19 20:29:10,289 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) [2022-07-19 20:29:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1220 transitions. [2022-07-19 20:29:10,292 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1220 transitions. Word has length 68 [2022-07-19 20:29:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:10,292 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1220 transitions. [2022-07-19 20:29:10,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 20:29:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1220 transitions. [2022-07-19 20:29:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:29:10,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:10,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:10,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:10,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 20:29:10,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash -159219143, now seen corresponding path program 1 times [2022-07-19 20:29:10,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:10,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822402164] [2022-07-19 20:29:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:10,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:29:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:29:10,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:10,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822402164] [2022-07-19 20:29:10,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822402164] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:10,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659485686] [2022-07-19 20:29:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:10,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:10,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:10,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:10,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 20:29:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 20:29:10,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:10,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:29:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:29:10,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659485686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:29:10,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:29:10,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-19 20:29:10,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150558070] [2022-07-19 20:29:10,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:29:10,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 20:29:10,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:10,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 20:29:10,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:29:10,951 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) [2022-07-19 20:29:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:12,018 INFO L93 Difference]: Finished difference Result 2605 states and 3440 transitions. [2022-07-19 20:29:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 20:29:12,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-07-19 20:29:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:12,033 INFO L225 Difference]: With dead ends: 2605 [2022-07-19 20:29:12,033 INFO L226 Difference]: Without dead ends: 2061 [2022-07-19 20:29:12,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 20:29:12,036 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 890 mSDsluCounter, 2495 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 3038 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:12,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 3038 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 20:29:12,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-07-19 20:29:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1294. [2022-07-19 20:29:12,093 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) [2022-07-19 20:29:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1708 transitions. [2022-07-19 20:29:12,097 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1708 transitions. Word has length 69 [2022-07-19 20:29:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:12,097 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 1708 transitions. [2022-07-19 20:29:12,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 20:29:12,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1708 transitions. [2022-07-19 20:29:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-19 20:29:12,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:12,100 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:12,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:12,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-19 20:29:12,315 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:12,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1275467893, now seen corresponding path program 1 times [2022-07-19 20:29:12,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:12,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134268661] [2022-07-19 20:29:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:12,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 20:29:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-19 20:29:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 20:29:12,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134268661] [2022-07-19 20:29:12,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134268661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192536595] [2022-07-19 20:29:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:12,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:12,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:12,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:12,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 20:29:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 20:29:12,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:29:12,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:12,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192536595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:12,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:12,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 20:29:12,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244396763] [2022-07-19 20:29:12,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:12,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:12,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:12,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:12,523 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) [2022-07-19 20:29:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:12,584 INFO L93 Difference]: Finished difference Result 2017 states and 2646 transitions. [2022-07-19 20:29:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-07-19 20:29:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:12,589 INFO L225 Difference]: With dead ends: 2017 [2022-07-19 20:29:12,589 INFO L226 Difference]: Without dead ends: 1172 [2022-07-19 20:29:12,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:12,591 INFO L413 NwaCegarLoop]: 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 [2022-07-19 20:29:12,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 519 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-07-19 20:29:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1157. [2022-07-19 20:29:12,629 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) [2022-07-19 20:29:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1528 transitions. [2022-07-19 20:29:12,633 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1528 transitions. Word has length 88 [2022-07-19 20:29:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:12,634 INFO L495 AbstractCegarLoop]: Abstraction has 1157 states and 1528 transitions. [2022-07-19 20:29:12,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 20:29:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1528 transitions. [2022-07-19 20:29:12,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:12,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:12,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:12,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:12,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:12,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash -118977572, now seen corresponding path program 1 times [2022-07-19 20:29:12,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:12,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439940404] [2022-07-19 20:29:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439940404] [2022-07-19 20:29:12,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439940404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:12,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:12,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:12,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587019426] [2022-07-19 20:29:12,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:12,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:12,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:12,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:12,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:12,928 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) [2022-07-19 20:29:14,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:14,191 INFO L93 Difference]: Finished difference Result 1694 states and 2384 transitions. [2022-07-19 20:29:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:29:14,191 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 [2022-07-19 20:29:14,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:14,196 INFO L225 Difference]: With dead ends: 1694 [2022-07-19 20:29:14,196 INFO L226 Difference]: Without dead ends: 1498 [2022-07-19 20:29:14,197 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:29:14,199 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 866 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:14,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 1900 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 20:29:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-07-19 20:29:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1359. [2022-07-19 20:29:14,268 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) [2022-07-19 20:29:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1847 transitions. [2022-07-19 20:29:14,272 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1847 transitions. Word has length 102 [2022-07-19 20:29:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:14,272 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 1847 transitions. [2022-07-19 20:29:14,273 INFO L496 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) [2022-07-19 20:29:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1847 transitions. [2022-07-19 20:29:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:14,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:14,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:14,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 20:29:14,277 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:14,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:14,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1757505246, now seen corresponding path program 1 times [2022-07-19 20:29:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:14,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066513070] [2022-07-19 20:29:14,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:14,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:14,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066513070] [2022-07-19 20:29:14,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066513070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:14,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:14,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:14,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664393866] [2022-07-19 20:29:14,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:14,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:14,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:14,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:14,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:14,370 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) [2022-07-19 20:29:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:15,614 INFO L93 Difference]: Finished difference Result 2374 states and 3451 transitions. [2022-07-19 20:29:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:29:15,615 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 [2022-07-19 20:29:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:15,623 INFO L225 Difference]: With dead ends: 2374 [2022-07-19 20:29:15,623 INFO L226 Difference]: Without dead ends: 1978 [2022-07-19 20:29:15,625 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:29:15,625 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 868 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:15,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1811 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 20:29:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-07-19 20:29:15,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1731. [2022-07-19 20:29:15,734 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) [2022-07-19 20:29:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2422 transitions. [2022-07-19 20:29:15,739 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2422 transitions. Word has length 102 [2022-07-19 20:29:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:15,740 INFO L495 AbstractCegarLoop]: Abstraction has 1731 states and 2422 transitions. [2022-07-19 20:29:15,741 INFO L496 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) [2022-07-19 20:29:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2422 transitions. [2022-07-19 20:29:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:15,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:15,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:15,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 20:29:15,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:15,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash -121625700, now seen corresponding path program 1 times [2022-07-19 20:29:15,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:15,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816805658] [2022-07-19 20:29:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:15,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:15,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:15,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816805658] [2022-07-19 20:29:15,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816805658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:15,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:15,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:15,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980950164] [2022-07-19 20:29:15,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:15,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:15,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:15,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:15,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:15,817 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) [2022-07-19 20:29:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:16,406 INFO L93 Difference]: Finished difference Result 2749 states and 4045 transitions. [2022-07-19 20:29:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:29:16,406 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 [2022-07-19 20:29:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:16,414 INFO L225 Difference]: With dead ends: 2749 [2022-07-19 20:29:16,414 INFO L226 Difference]: Without dead ends: 1979 [2022-07-19 20:29:16,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:29:16,416 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 816 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:16,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 978 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 20:29:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-07-19 20:29:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1731. [2022-07-19 20:29:16,487 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) [2022-07-19 20:29:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2417 transitions. [2022-07-19 20:29:16,493 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2417 transitions. Word has length 102 [2022-07-19 20:29:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:16,493 INFO L495 AbstractCegarLoop]: Abstraction has 1731 states and 2417 transitions. [2022-07-19 20:29:16,494 INFO L496 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) [2022-07-19 20:29:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2417 transitions. [2022-07-19 20:29:16,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:16,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:16,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:16,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 20:29:16,499 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:16,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1203230494, now seen corresponding path program 1 times [2022-07-19 20:29:16,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:16,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630230128] [2022-07-19 20:29:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:16,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:16,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:16,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630230128] [2022-07-19 20:29:16,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630230128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:16,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:16,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:16,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249421698] [2022-07-19 20:29:16,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:16,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:16,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:16,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:16,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:16,573 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) [2022-07-19 20:29:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:17,866 INFO L93 Difference]: Finished difference Result 3699 states and 5504 transitions. [2022-07-19 20:29:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:29:17,867 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 [2022-07-19 20:29:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:17,876 INFO L225 Difference]: With dead ends: 3699 [2022-07-19 20:29:17,876 INFO L226 Difference]: Without dead ends: 2931 [2022-07-19 20:29:17,878 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:29:17,879 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 865 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:17,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 1802 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 20:29:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2022-07-19 20:29:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2480. [2022-07-19 20:29:17,989 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) [2022-07-19 20:29:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 3574 transitions. [2022-07-19 20:29:17,994 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 3574 transitions. Word has length 102 [2022-07-19 20:29:17,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:17,994 INFO L495 AbstractCegarLoop]: Abstraction has 2480 states and 3574 transitions. [2022-07-19 20:29:17,995 INFO L496 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) [2022-07-19 20:29:17,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 3574 transitions. [2022-07-19 20:29:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:17,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:17,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:17,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 20:29:17,998 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1524978852, now seen corresponding path program 1 times [2022-07-19 20:29:17,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:17,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298753325] [2022-07-19 20:29:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:17,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:18,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:18,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298753325] [2022-07-19 20:29:18,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298753325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:18,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:18,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:18,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512419910] [2022-07-19 20:29:18,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:18,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:18,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:18,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:18,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:18,076 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) [2022-07-19 20:29:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:19,392 INFO L93 Difference]: Finished difference Result 6356 states and 9661 transitions. [2022-07-19 20:29:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:29:19,392 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 [2022-07-19 20:29:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:19,407 INFO L225 Difference]: With dead ends: 6356 [2022-07-19 20:29:19,407 INFO L226 Difference]: Without dead ends: 4839 [2022-07-19 20:29:19,410 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:29:19,411 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 865 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:19,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 1799 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 20:29:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2022-07-19 20:29:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 3985. [2022-07-19 20:29:19,559 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) [2022-07-19 20:29:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 5916 transitions. [2022-07-19 20:29:19,568 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 5916 transitions. Word has length 102 [2022-07-19 20:29:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:19,568 INFO L495 AbstractCegarLoop]: Abstraction has 3985 states and 5916 transitions. [2022-07-19 20:29:19,568 INFO L496 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) [2022-07-19 20:29:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 5916 transitions. [2022-07-19 20:29:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:19,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:19,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:19,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 20:29:19,572 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1712150366, now seen corresponding path program 1 times [2022-07-19 20:29:19,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:19,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186201790] [2022-07-19 20:29:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:19,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:19,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:19,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186201790] [2022-07-19 20:29:19,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186201790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:19,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:19,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:19,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832532757] [2022-07-19 20:29:19,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:19,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:19,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:19,635 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) [2022-07-19 20:29:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:21,493 INFO L93 Difference]: Finished difference Result 12933 states and 19923 transitions. [2022-07-19 20:29:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:29:21,494 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 [2022-07-19 20:29:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:21,537 INFO L225 Difference]: With dead ends: 12933 [2022-07-19 20:29:21,537 INFO L226 Difference]: Without dead ends: 9911 [2022-07-19 20:29:21,545 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:29:21,545 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 1080 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:21,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 1790 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 20:29:21,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9911 states. [2022-07-19 20:29:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9911 to 6962. [2022-07-19 20:29:21,895 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) [2022-07-19 20:29:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 10612 transitions. [2022-07-19 20:29:21,910 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 10612 transitions. Word has length 102 [2022-07-19 20:29:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:21,910 INFO L495 AbstractCegarLoop]: Abstraction has 6962 states and 10612 transitions. [2022-07-19 20:29:21,911 INFO L496 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) [2022-07-19 20:29:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 10612 transitions. [2022-07-19 20:29:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:21,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:21,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:21,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 20:29:21,918 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:21,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:21,918 INFO L85 PathProgramCache]: Analyzing trace with hash 569647900, now seen corresponding path program 1 times [2022-07-19 20:29:21,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:21,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865164512] [2022-07-19 20:29:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:21,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:21,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:21,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865164512] [2022-07-19 20:29:21,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865164512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:21,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:21,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:21,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141055213] [2022-07-19 20:29:21,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:21,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:21,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:21,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:21,979 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) [2022-07-19 20:29:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:22,921 INFO L93 Difference]: Finished difference Result 14664 states and 22986 transitions. [2022-07-19 20:29:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:29:22,921 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 [2022-07-19 20:29:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:22,945 INFO L225 Difference]: With dead ends: 14664 [2022-07-19 20:29:22,946 INFO L226 Difference]: Without dead ends: 8663 [2022-07-19 20:29:22,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:29:22,962 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 818 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:22,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 961 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 20:29:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8663 states. [2022-07-19 20:29:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8663 to 6962. [2022-07-19 20:29:23,295 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) [2022-07-19 20:29:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 10579 transitions. [2022-07-19 20:29:23,312 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 10579 transitions. Word has length 102 [2022-07-19 20:29:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:23,312 INFO L495 AbstractCegarLoop]: Abstraction has 6962 states and 10579 transitions. [2022-07-19 20:29:23,312 INFO L496 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) [2022-07-19 20:29:23,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 10579 transitions. [2022-07-19 20:29:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:23,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:23,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:23,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 20:29:23,321 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash 809887646, now seen corresponding path program 1 times [2022-07-19 20:29:23,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:23,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432673074] [2022-07-19 20:29:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:23,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:23,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:23,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:23,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:23,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:23,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:23,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432673074] [2022-07-19 20:29:23,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432673074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:23,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:23,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:23,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258322922] [2022-07-19 20:29:23,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:23,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:23,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:23,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:23,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:23,413 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) [2022-07-19 20:29:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:25,673 INFO L93 Difference]: Finished difference Result 23366 states and 36411 transitions. [2022-07-19 20:29:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:29:25,674 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 [2022-07-19 20:29:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:25,735 INFO L225 Difference]: With dead ends: 23366 [2022-07-19 20:29:25,735 INFO L226 Difference]: Without dead ends: 17367 [2022-07-19 20:29:25,752 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:29:25,752 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 896 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:25,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 1818 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 20:29:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17367 states. [2022-07-19 20:29:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17367 to 12962. [2022-07-19 20:29:26,447 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) [2022-07-19 20:29:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12962 states to 12962 states and 20178 transitions. [2022-07-19 20:29:26,478 INFO L78 Accepts]: Start accepts. Automaton has 12962 states and 20178 transitions. Word has length 102 [2022-07-19 20:29:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:26,478 INFO L495 AbstractCegarLoop]: Abstraction has 12962 states and 20178 transitions. [2022-07-19 20:29:26,478 INFO L496 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) [2022-07-19 20:29:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 12962 states and 20178 transitions. [2022-07-19 20:29:26,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:26,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:26,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:26,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 20:29:26,492 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:26,493 INFO L85 PathProgramCache]: Analyzing trace with hash 836953248, now seen corresponding path program 1 times [2022-07-19 20:29:26,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:26,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383554740] [2022-07-19 20:29:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:26,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:26,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:26,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383554740] [2022-07-19 20:29:26,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383554740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:26,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:26,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:26,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603821862] [2022-07-19 20:29:26,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:26,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:26,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:26,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:26,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:26,565 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) [2022-07-19 20:29:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:29,310 INFO L93 Difference]: Finished difference Result 44566 states and 70622 transitions. [2022-07-19 20:29:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:29:29,311 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 [2022-07-19 20:29:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:29,436 INFO L225 Difference]: With dead ends: 44566 [2022-07-19 20:29:29,436 INFO L226 Difference]: Without dead ends: 32567 [2022-07-19 20:29:29,472 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:29:29,472 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 933 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:29,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 1769 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 20:29:29,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32567 states. [2022-07-19 20:29:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32567 to 24930. [2022-07-19 20:29:30,787 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) [2022-07-19 20:29:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24930 states to 24930 states and 39830 transitions. [2022-07-19 20:29:30,847 INFO L78 Accepts]: Start accepts. Automaton has 24930 states and 39830 transitions. Word has length 102 [2022-07-19 20:29:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:30,847 INFO L495 AbstractCegarLoop]: Abstraction has 24930 states and 39830 transitions. [2022-07-19 20:29:30,848 INFO L496 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) [2022-07-19 20:29:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 24930 states and 39830 transitions. [2022-07-19 20:29:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:30,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:30,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:30,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 20:29:30,862 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1240383650, now seen corresponding path program 1 times [2022-07-19 20:29:30,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:30,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381963887] [2022-07-19 20:29:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:30,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:30,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:30,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:30,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:30,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:30,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:30,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381963887] [2022-07-19 20:29:30,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381963887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:30,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:30,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:30,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012918008] [2022-07-19 20:29:30,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:30,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:30,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:30,921 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) [2022-07-19 20:29:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:35,593 INFO L93 Difference]: Finished difference Result 85782 states and 139100 transitions. [2022-07-19 20:29:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:29:35,593 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 [2022-07-19 20:29:35,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:35,842 INFO L225 Difference]: With dead ends: 85782 [2022-07-19 20:29:35,842 INFO L226 Difference]: Without dead ends: 61815 [2022-07-19 20:29:35,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:29:35,913 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 895 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:35,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 1765 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 20:29:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61815 states. [2022-07-19 20:29:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61815 to 48802. [2022-07-19 20:29:38,745 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) [2022-07-19 20:29:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48802 states to 48802 states and 80528 transitions. [2022-07-19 20:29:38,892 INFO L78 Accepts]: Start accepts. Automaton has 48802 states and 80528 transitions. Word has length 102 [2022-07-19 20:29:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:38,892 INFO L495 AbstractCegarLoop]: Abstraction has 48802 states and 80528 transitions. [2022-07-19 20:29:38,892 INFO L496 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) [2022-07-19 20:29:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 48802 states and 80528 transitions. [2022-07-19 20:29:38,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 20:29:38,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:38,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:38,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 20:29:38,927 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash 493720800, now seen corresponding path program 1 times [2022-07-19 20:29:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:38,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551331686] [2022-07-19 20:29:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:38,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:38,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:38,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:29:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:38,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:29:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:38,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:29:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:38,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:29:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:38,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:38,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551331686] [2022-07-19 20:29:38,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551331686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:38,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:38,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 20:29:38,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494525301] [2022-07-19 20:29:38,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:38,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:29:38,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:38,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:29:38,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:29:38,997 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) [2022-07-19 20:29:46,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:46,978 INFO L93 Difference]: Finished difference Result 163812 states and 267994 transitions. [2022-07-19 20:29:46,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:29:46,978 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 [2022-07-19 20:29:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:47,658 INFO L225 Difference]: With dead ends: 163812 [2022-07-19 20:29:47,659 INFO L226 Difference]: Without dead ends: 115973 [2022-07-19 20:29:47,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 20:29:47,769 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 1113 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:47,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1148 Valid, 1518 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 20:29:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115973 states. [2022-07-19 20:29:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115973 to 94075. [2022-07-19 20:29:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94075 states, 84233 states have (on average 1.517683093324469) internal successors, (127839), 85019 states have internal predecessors, (127839), 6211 states have call successors, (6211), 3110 states have call predecessors, (6211), 3629 states have return successors, (20133), 6201 states have call predecessors, (20133), 6208 states have call successors, (20133) [2022-07-19 20:29:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94075 states to 94075 states and 154183 transitions. [2022-07-19 20:29:53,728 INFO L78 Accepts]: Start accepts. Automaton has 94075 states and 154183 transitions. Word has length 102 [2022-07-19 20:29:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:53,728 INFO L495 AbstractCegarLoop]: Abstraction has 94075 states and 154183 transitions. [2022-07-19 20:29:53,728 INFO L496 AbstractCegarLoop]: INTERPOLANT 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) [2022-07-19 20:29:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 94075 states and 154183 transitions. [2022-07-19 20:29:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 20:29:53,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:53,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:53,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 20:29:53,767 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:53,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1031380781, now seen corresponding path program 1 times [2022-07-19 20:29:53,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:53,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294822901] [2022-07-19 20:29:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:53,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:53,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:53,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:53,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:29:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:53,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 20:29:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:53,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 20:29:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 20:29:53,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294822901] [2022-07-19 20:29:53,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294822901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605299429] [2022-07-19 20:29:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:53,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:53,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:53,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:53,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 20:29:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:53,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:53,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 20:29:53,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:53,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605299429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:53,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:53,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 20:29:53,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888928772] [2022-07-19 20:29:53,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:53,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:53,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:53,955 INFO L87 Difference]: Start difference. First operand 94075 states and 154183 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 20:29:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:58,529 INFO L93 Difference]: Finished difference Result 94454 states and 154651 transitions. [2022-07-19 20:29:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-07-19 20:29:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:58,960 INFO L225 Difference]: With dead ends: 94454 [2022-07-19 20:29:58,960 INFO L226 Difference]: Without dead ends: 93128 [2022-07-19 20:29:58,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:58,997 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 62 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:58,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 842 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93128 states. [2022-07-19 20:30:04,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93128 to 93128. [2022-07-19 20:30:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93128 states, 83389 states have (on average 1.5203564019235152) internal successors, (126781), 84159 states have internal predecessors, (126781), 6154 states have call successors, (6154), 3073 states have call predecessors, (6154), 3584 states have return successors, (20041), 6151 states have call predecessors, (20041), 6152 states have call successors, (20041) [2022-07-19 20:30:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93128 states to 93128 states and 152976 transitions. [2022-07-19 20:30:04,443 INFO L78 Accepts]: Start accepts. Automaton has 93128 states and 152976 transitions. Word has length 103 [2022-07-19 20:30:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:30:04,443 INFO L495 AbstractCegarLoop]: Abstraction has 93128 states and 152976 transitions. [2022-07-19 20:30:04,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 20:30:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 93128 states and 152976 transitions. [2022-07-19 20:30:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-07-19 20:30:04,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:30:04,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:30:04,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 20:30:04,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:30:04,799 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:30:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:30:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1230757169, now seen corresponding path program 1 times [2022-07-19 20:30:04,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:30:04,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166290019] [2022-07-19 20:30:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:30:04,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:30:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:04,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:30:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:04,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 20:30:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:04,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 20:30:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:04,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 20:30:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:04,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 20:30:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:04,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-19 20:30:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:04,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:30:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:04,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-07-19 20:30:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 20:30:04,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:30:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166290019] [2022-07-19 20:30:04,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166290019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:30:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684921484] [2022-07-19 20:30:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:30:04,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:30:04,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:30:04,916 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:30:04,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 20:30:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:30:05,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:30:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 20:30:05,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:30:05,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684921484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:30:05,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:30:05,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 20:30:05,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528814421] [2022-07-19 20:30:05,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:30:05,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:30:05,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:30:05,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:30:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:30:05,155 INFO L87 Difference]: Start difference. First operand 93128 states and 152976 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)