./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:07:25,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:07:25,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:07:25,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:07:25,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:07:25,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:07:25,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:07:25,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:07:25,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:07:25,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:07:25,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:07:25,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:07:25,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:07:25,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:07:25,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:07:25,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:07:25,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:07:25,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:07:25,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:07:25,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:07:25,588 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:07:25,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:07:25,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:07:25,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:07:25,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:07:25,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:07:25,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:07:25,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:07:25,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:07:25,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:07:25,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:07:25,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:07:25,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:07:25,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:07:25,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:07:25,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:07:25,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:07:25,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:07:25,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:07:25,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:07:25,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:07:25,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:07:25,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:07:25,629 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:07:25,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:07:25,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:07:25,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:07:25,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:07:25,630 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:07:25,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:07:25,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:07:25,631 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:07:25,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:07:25,632 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:07:25,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:07:25,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:07:25,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:07:25,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:07:25,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:07:25,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:07:25,633 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:07:25,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:07:25,633 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:07:25,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:07:25,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:07:25,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:07:25,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:07:25,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:07:25,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:07:25,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:07:25,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:07:25,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:07:25,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:07:25,635 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:07:25,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:07:25,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:07:25,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be [2022-07-13 21:07:25,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:07:25,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:07:25,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:07:25,813 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:07:25,814 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:07:25,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-07-13 21:07:25,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/253a69162/4eba4918f96f4df38c5903b13b62b025/FLAG89d6f39db [2022-07-13 21:07:26,247 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:07:26,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-07-13 21:07:26,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/253a69162/4eba4918f96f4df38c5903b13b62b025/FLAG89d6f39db [2022-07-13 21:07:26,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/253a69162/4eba4918f96f4df38c5903b13b62b025 [2022-07-13 21:07:26,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:07:26,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:07:26,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:07:26,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:07:26,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:07:26,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1f4883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26, skipping insertion in model container [2022-07-13 21:07:26,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:07:26,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:07:26,435 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[913,926] [2022-07-13 21:07:26,465 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[5977,5990] [2022-07-13 21:07:26,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:07:26,503 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:07:26,510 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[913,926] [2022-07-13 21:07:26,520 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[5977,5990] [2022-07-13 21:07:26,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:07:26,562 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:07:26,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26 WrapperNode [2022-07-13 21:07:26,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:07:26,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:07:26,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:07:26,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:07:26,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,620 INFO L137 Inliner]: procedures = 56, calls = 61, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 596 [2022-07-13 21:07:26,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:07:26,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:07:26,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:07:26,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:07:26,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:07:26,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:07:26,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:07:26,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:07:26,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (1/1) ... [2022-07-13 21:07:26,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:07:26,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:26,697 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) [2022-07-13 21:07:26,699 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 [2022-07-13 21:07:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:07:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-13 21:07:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-13 21:07:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-13 21:07:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-13 21:07:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-13 21:07:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-13 21:07:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-13 21:07:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-13 21:07:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-13 21:07:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-13 21:07:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-13 21:07:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-13 21:07:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-13 21:07:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-13 21:07:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:07:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-13 21:07:26,725 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-13 21:07:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:07:26,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:07:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-13 21:07:26,725 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-13 21:07:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-13 21:07:26,725 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-13 21:07:26,800 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:07:26,815 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:07:27,167 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:07:27,181 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:07:27,182 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-13 21:07:27,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:07:27 BoogieIcfgContainer [2022-07-13 21:07:27,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:07:27,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:07:27,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:07:27,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:07:27,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:07:26" (1/3) ... [2022-07-13 21:07:27,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74485336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:07:27, skipping insertion in model container [2022-07-13 21:07:27,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:26" (2/3) ... [2022-07-13 21:07:27,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74485336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:07:27, skipping insertion in model container [2022-07-13 21:07:27,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:07:27" (3/3) ... [2022-07-13 21:07:27,192 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-07-13 21:07:27,202 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:07:27,202 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:07:27,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:07:27,285 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@708cfb64, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@db89fc5 [2022-07-13 21:07:27,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:07:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 230 states have internal predecessors, (358), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-13 21:07:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 21:07:27,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:27,296 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] [2022-07-13 21:07:27,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash -994911012, now seen corresponding path program 1 times [2022-07-13 21:07:27,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:27,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691876122] [2022-07-13 21:07:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:27,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 21:07:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:27,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:27,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691876122] [2022-07-13 21:07:27,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691876122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:27,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:27,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:07:27,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295295874] [2022-07-13 21:07:27,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:27,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:27,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:07:27,513 INFO L87 Difference]: Start difference. First operand has 262 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 230 states have internal predecessors, (358), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:07:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:27,751 INFO L93 Difference]: Finished difference Result 576 states and 904 transitions. [2022-07-13 21:07:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:07:27,753 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 [2022-07-13 21:07:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:27,761 INFO L225 Difference]: With dead ends: 576 [2022-07-13 21:07:27,761 INFO L226 Difference]: Without dead ends: 321 [2022-07-13 21:07:27,765 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 [2022-07-13 21:07:27,766 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 477 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:27,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 669 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:07:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-13 21:07:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 315. [2022-07-13 21:07:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 272 states have (on average 1.474264705882353) internal successors, (401), 277 states have internal predecessors, (401), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (32), 26 states have call predecessors, (32), 26 states have call successors, (32) [2022-07-13 21:07:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 463 transitions. [2022-07-13 21:07:27,840 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 463 transitions. Word has length 44 [2022-07-13 21:07:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:27,841 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 463 transitions. [2022-07-13 21:07:27,841 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) [2022-07-13 21:07:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 463 transitions. [2022-07-13 21:07:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 21:07:27,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:27,844 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] [2022-07-13 21:07:27,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:07:27,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:27,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash -983625859, now seen corresponding path program 1 times [2022-07-13 21:07:27,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:27,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633286743] [2022-07-13 21:07:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:27,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 21:07:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:27,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633286743] [2022-07-13 21:07:27,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633286743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:27,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:27,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:07:27,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227696766] [2022-07-13 21:07:27,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:27,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:27,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:27,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:07:27,905 INFO L87 Difference]: Start difference. First operand 315 states and 463 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:07:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:28,111 INFO L93 Difference]: Finished difference Result 563 states and 803 transitions. [2022-07-13 21:07:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:07:28,113 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 [2022-07-13 21:07:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:28,122 INFO L225 Difference]: With dead ends: 563 [2022-07-13 21:07:28,123 INFO L226 Difference]: Without dead ends: 439 [2022-07-13 21:07:28,127 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 [2022-07-13 21:07:28,128 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 209 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:28,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 840 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 21:07:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-13 21:07:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 382. [2022-07-13 21:07:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 333 states have (on average 1.4564564564564564) internal successors, (485), 338 states have internal predecessors, (485), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (35), 29 states have call predecessors, (35), 29 states have call successors, (35) [2022-07-13 21:07:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 553 transitions. [2022-07-13 21:07:28,159 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 553 transitions. Word has length 45 [2022-07-13 21:07:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:28,160 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 553 transitions. [2022-07-13 21:07:28,160 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) [2022-07-13 21:07:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 553 transitions. [2022-07-13 21:07:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 21:07:28,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:28,163 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] [2022-07-13 21:07:28,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:07:28,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:28,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:28,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2026983976, now seen corresponding path program 1 times [2022-07-13 21:07:28,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:28,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763349275] [2022-07-13 21:07:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:28,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 21:07:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:28,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763349275] [2022-07-13 21:07:28,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763349275] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:28,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:28,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:07:28,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566088995] [2022-07-13 21:07:28,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:28,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:28,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:28,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:28,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:07:28,220 INFO L87 Difference]: Start difference. First operand 382 states and 553 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:07:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:28,333 INFO L93 Difference]: Finished difference Result 790 states and 1112 transitions. [2022-07-13 21:07:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:07:28,333 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 [2022-07-13 21:07:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:28,337 INFO L225 Difference]: With dead ends: 790 [2022-07-13 21:07:28,337 INFO L226 Difference]: Without dead ends: 599 [2022-07-13 21:07:28,342 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 [2022-07-13 21:07:28,344 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 486 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:28,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 663 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:07:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-07-13 21:07:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 547. [2022-07-13 21:07:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 479 states have (on average 1.4091858037578289) internal successors, (675), 487 states have internal predecessors, (675), 44 states have call successors, (44), 22 states have call predecessors, (44), 22 states have return successors, (52), 38 states have call predecessors, (52), 40 states have call successors, (52) [2022-07-13 21:07:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 771 transitions. [2022-07-13 21:07:28,384 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 771 transitions. Word has length 45 [2022-07-13 21:07:28,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:28,384 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 771 transitions. [2022-07-13 21:07:28,385 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) [2022-07-13 21:07:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 771 transitions. [2022-07-13 21:07:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 21:07:28,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:28,387 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] [2022-07-13 21:07:28,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:07:28,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:28,387 INFO L85 PathProgramCache]: Analyzing trace with hash -89185588, now seen corresponding path program 1 times [2022-07-13 21:07:28,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:28,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532777173] [2022-07-13 21:07:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:28,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 21:07:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:07:28,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:28,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532777173] [2022-07-13 21:07:28,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532777173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:28,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:28,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:07:28,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449366648] [2022-07-13 21:07:28,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:28,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:28,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:28,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:28,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:07:28,473 INFO L87 Difference]: Start difference. First operand 547 states and 771 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 21:07:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:28,685 INFO L93 Difference]: Finished difference Result 1131 states and 1556 transitions. [2022-07-13 21:07:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:07:28,686 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 [2022-07-13 21:07:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:28,690 INFO L225 Difference]: With dead ends: 1131 [2022-07-13 21:07:28,690 INFO L226 Difference]: Without dead ends: 775 [2022-07-13 21:07:28,691 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 [2022-07-13 21:07:28,692 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 193 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:28,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 895 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 21:07:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-07-13 21:07:28,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 737. [2022-07-13 21:07:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 645 states have (on average 1.3565891472868217) internal successors, (875), 655 states have internal predecessors, (875), 58 states have call successors, (58), 30 states have call predecessors, (58), 32 states have return successors, (76), 52 states have call predecessors, (76), 54 states have call successors, (76) [2022-07-13 21:07:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1009 transitions. [2022-07-13 21:07:28,726 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1009 transitions. Word has length 62 [2022-07-13 21:07:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:28,726 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 1009 transitions. [2022-07-13 21:07:28,727 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) [2022-07-13 21:07:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1009 transitions. [2022-07-13 21:07:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 21:07:28,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:28,728 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] [2022-07-13 21:07:28,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:07:28,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:28,729 INFO L85 PathProgramCache]: Analyzing trace with hash 613039140, now seen corresponding path program 1 times [2022-07-13 21:07:28,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:28,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456008169] [2022-07-13 21:07:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:28,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 21:07:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-13 21:07:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 21:07:28,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:28,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456008169] [2022-07-13 21:07:28,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456008169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:28,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:28,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:07:28,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274239899] [2022-07-13 21:07:28,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:28,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:28,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:28,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:28,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:07:28,768 INFO L87 Difference]: Start difference. First operand 737 states and 1009 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 21:07:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:28,862 INFO L93 Difference]: Finished difference Result 1390 states and 1862 transitions. [2022-07-13 21:07:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:07:28,862 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 [2022-07-13 21:07:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:28,866 INFO L225 Difference]: With dead ends: 1390 [2022-07-13 21:07:28,866 INFO L226 Difference]: Without dead ends: 936 [2022-07-13 21:07:28,867 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 [2022-07-13 21:07:28,868 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 473 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:28,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 660 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:07:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-07-13 21:07:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 881. [2022-07-13 21:07:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 773 states have (on average 1.3272962483829236) internal successors, (1026), 785 states have internal predecessors, (1026), 66 states have call successors, (66), 36 states have call predecessors, (66), 40 states have return successors, (90), 60 states have call predecessors, (90), 62 states have call successors, (90) [2022-07-13 21:07:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1182 transitions. [2022-07-13 21:07:28,896 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1182 transitions. Word has length 67 [2022-07-13 21:07:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:28,896 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1182 transitions. [2022-07-13 21:07:28,896 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) [2022-07-13 21:07:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1182 transitions. [2022-07-13 21:07:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 21:07:28,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:28,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:28,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:07:28,898 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash 250622658, now seen corresponding path program 1 times [2022-07-13 21:07:28,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:28,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698620012] [2022-07-13 21:07:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:28,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 21:07:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 21:07:28,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:28,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698620012] [2022-07-13 21:07:28,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698620012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:28,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45184012] [2022-07-13 21:07:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:28,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:28,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:28,975 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) [2022-07-13 21:07:28,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:07:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 21:07:29,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:07:29,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:29,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45184012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:29,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:29,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 21:07:29,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864854452] [2022-07-13 21:07:29,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:29,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:29,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:29,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:29,108 INFO L87 Difference]: Start difference. First operand 881 states and 1182 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 21:07:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:29,174 INFO L93 Difference]: Finished difference Result 1424 states and 1905 transitions. [2022-07-13 21:07:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:29,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-07-13 21:07:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:29,178 INFO L225 Difference]: With dead ends: 1424 [2022-07-13 21:07:29,178 INFO L226 Difference]: Without dead ends: 879 [2022-07-13 21:07:29,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:29,180 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 72 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:29,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 766 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-07-13 21:07:29,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 835. [2022-07-13 21:07:29,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 733 states have (on average 1.311050477489768) internal successors, (961), 745 states have internal predecessors, (961), 62 states have call successors, (62), 34 states have call predecessors, (62), 38 states have return successors, (84), 56 states have call predecessors, (84), 58 states have call successors, (84) [2022-07-13 21:07:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1107 transitions. [2022-07-13 21:07:29,203 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1107 transitions. Word has length 68 [2022-07-13 21:07:29,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:29,204 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1107 transitions. [2022-07-13 21:07:29,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 21:07:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1107 transitions. [2022-07-13 21:07:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 21:07:29,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:29,206 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] [2022-07-13 21:07:29,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:29,419 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 [2022-07-13 21:07:29,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:29,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1864372863, now seen corresponding path program 1 times [2022-07-13 21:07:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:29,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545599031] [2022-07-13 21:07:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 21:07:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:07:29,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545599031] [2022-07-13 21:07:29,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545599031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247124075] [2022-07-13 21:07:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:29,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:29,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:29,498 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) [2022-07-13 21:07:29,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:07:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 21:07:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:29,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:07:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:07:29,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247124075] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:29,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 21:07:29,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-13 21:07:29,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970377496] [2022-07-13 21:07:29,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:29,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:29,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:29,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:29,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:29,711 INFO L87 Difference]: Start difference. First operand 835 states and 1107 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 21:07:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:29,796 INFO L93 Difference]: Finished difference Result 887 states and 1169 transitions. [2022-07-13 21:07:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:07:29,796 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 [2022-07-13 21:07:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:29,801 INFO L225 Difference]: With dead ends: 887 [2022-07-13 21:07:29,801 INFO L226 Difference]: Without dead ends: 884 [2022-07-13 21:07:29,802 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 [2022-07-13 21:07:29,802 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 651 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:29,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 459 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:07:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-13 21:07:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 834. [2022-07-13 21:07:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 733 states have (on average 1.3083219645293316) internal successors, (959), 744 states have internal predecessors, (959), 61 states have call successors, (61), 34 states have call predecessors, (61), 38 states have return successors, (84), 56 states have call predecessors, (84), 58 states have call successors, (84) [2022-07-13 21:07:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1104 transitions. [2022-07-13 21:07:29,857 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1104 transitions. Word has length 68 [2022-07-13 21:07:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:29,857 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1104 transitions. [2022-07-13 21:07:29,857 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) [2022-07-13 21:07:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1104 transitions. [2022-07-13 21:07:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 21:07:29,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:29,859 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] [2022-07-13 21:07:29,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:30,075 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 [2022-07-13 21:07:30,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:30,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1961817817, now seen corresponding path program 1 times [2022-07-13 21:07:30,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:30,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22203743] [2022-07-13 21:07:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:30,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 21:07:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:07:30,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:30,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22203743] [2022-07-13 21:07:30,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22203743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:30,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235982294] [2022-07-13 21:07:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:30,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:30,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:30,160 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) [2022-07-13 21:07:30,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:07:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:07:30,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:30,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:07:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:07:30,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235982294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:07:30,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:07:30,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-13 21:07:30,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040475420] [2022-07-13 21:07:30,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:07:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 21:07:30,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:30,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 21:07:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:07:30,474 INFO L87 Difference]: Start difference. First operand 834 states and 1104 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 21:07:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:31,366 INFO L93 Difference]: Finished difference Result 2344 states and 3042 transitions. [2022-07-13 21:07:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 21:07:31,366 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 [2022-07-13 21:07:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:31,372 INFO L225 Difference]: With dead ends: 2344 [2022-07-13 21:07:31,372 INFO L226 Difference]: Without dead ends: 1848 [2022-07-13 21:07:31,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 21:07:31,374 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 1090 mSDsluCounter, 2038 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2533 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:31,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 2533 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 21:07:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-07-13 21:07:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1213. [2022-07-13 21:07:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1073 states have (on average 1.277726001863933) internal successors, (1371), 1092 states have internal predecessors, (1371), 81 states have call successors, (81), 48 states have call predecessors, (81), 57 states have return successors, (118), 73 states have call predecessors, (118), 78 states have call successors, (118) [2022-07-13 21:07:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1570 transitions. [2022-07-13 21:07:31,420 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1570 transitions. Word has length 69 [2022-07-13 21:07:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:31,420 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1570 transitions. [2022-07-13 21:07:31,421 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) [2022-07-13 21:07:31,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1570 transitions. [2022-07-13 21:07:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-13 21:07:31,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:31,423 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] [2022-07-13 21:07:31,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:31,640 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 [2022-07-13 21:07:31,640 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash 484677058, now seen corresponding path program 1 times [2022-07-13 21:07:31,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:31,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789944697] [2022-07-13 21:07:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:31,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:31,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:31,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 21:07:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:31,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 21:07:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 21:07:31,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:31,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789944697] [2022-07-13 21:07:31,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789944697] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:31,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427447749] [2022-07-13 21:07:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:31,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:31,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:31,709 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) [2022-07-13 21:07:31,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:07:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 21:07:31,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:07:31,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:31,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427447749] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:31,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:31,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 21:07:31,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90787351] [2022-07-13 21:07:31,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:31,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:31,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:31,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:31,826 INFO L87 Difference]: Start difference. First operand 1213 states and 1570 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 21:07:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:31,863 INFO L93 Difference]: Finished difference Result 1904 states and 2445 transitions. [2022-07-13 21:07:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:31,863 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 [2022-07-13 21:07:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:31,867 INFO L225 Difference]: With dead ends: 1904 [2022-07-13 21:07:31,867 INFO L226 Difference]: Without dead ends: 1135 [2022-07-13 21:07:31,868 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 [2022-07-13 21:07:31,870 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 330 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:31,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 474 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:31,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-07-13 21:07:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1126. [2022-07-13 21:07:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2720883534136547) internal successors, (1267), 1014 states have internal predecessors, (1267), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-13 21:07:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1454 transitions. [2022-07-13 21:07:31,910 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1454 transitions. Word has length 88 [2022-07-13 21:07:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:31,911 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1454 transitions. [2022-07-13 21:07:31,911 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) [2022-07-13 21:07:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1454 transitions. [2022-07-13 21:07:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 21:07:31,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:31,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:31,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:32,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:32,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1240141234, now seen corresponding path program 1 times [2022-07-13 21:07:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:32,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650902277] [2022-07-13 21:07:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:32,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:32,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:32,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650902277] [2022-07-13 21:07:32,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650902277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:32,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:32,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:07:32,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129126967] [2022-07-13 21:07:32,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:32,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:07:32,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:07:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:07:32,188 INFO L87 Difference]: Start difference. First operand 1126 states and 1454 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:32,587 INFO L93 Difference]: Finished difference Result 1354 states and 1810 transitions. [2022-07-13 21:07:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:07:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 21:07:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:32,591 INFO L225 Difference]: With dead ends: 1354 [2022-07-13 21:07:32,592 INFO L226 Difference]: Without dead ends: 1180 [2022-07-13 21:07:32,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:07:32,593 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 498 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:32,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 750 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 21:07:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-07-13 21:07:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1126. [2022-07-13 21:07:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2710843373493976) internal successors, (1266), 1014 states have internal predecessors, (1266), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-13 21:07:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1453 transitions. [2022-07-13 21:07:32,637 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1453 transitions. Word has length 91 [2022-07-13 21:07:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:32,637 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1453 transitions. [2022-07-13 21:07:32,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1453 transitions. [2022-07-13 21:07:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 21:07:32,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:32,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:32,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:07:32,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash 999901488, now seen corresponding path program 1 times [2022-07-13 21:07:32,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:32,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378576362] [2022-07-13 21:07:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:32,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:32,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:32,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378576362] [2022-07-13 21:07:32,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378576362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:32,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:32,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:07:32,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983242923] [2022-07-13 21:07:32,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:32,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:07:32,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:32,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:07:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:07:32,694 INFO L87 Difference]: Start difference. First operand 1126 states and 1453 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:33,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:33,185 INFO L93 Difference]: Finished difference Result 1351 states and 1806 transitions. [2022-07-13 21:07:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:07:33,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 21:07:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:33,189 INFO L225 Difference]: With dead ends: 1351 [2022-07-13 21:07:33,189 INFO L226 Difference]: Without dead ends: 1179 [2022-07-13 21:07:33,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:07:33,190 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 579 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:33,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 839 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 21:07:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-07-13 21:07:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1126. [2022-07-13 21:07:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2700803212851406) internal successors, (1265), 1014 states have internal predecessors, (1265), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-13 21:07:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1452 transitions. [2022-07-13 21:07:33,236 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1452 transitions. Word has length 91 [2022-07-13 21:07:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:33,236 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1452 transitions. [2022-07-13 21:07:33,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1452 transitions. [2022-07-13 21:07:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 21:07:33,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:33,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:33,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:07:33,239 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1077435410, now seen corresponding path program 1 times [2022-07-13 21:07:33,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:33,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324591327] [2022-07-13 21:07:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:33,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:33,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:33,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324591327] [2022-07-13 21:07:33,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324591327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:33,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:33,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:07:33,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901741725] [2022-07-13 21:07:33,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:33,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:07:33,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:07:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:33,295 INFO L87 Difference]: Start difference. First operand 1126 states and 1452 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:33,806 INFO L93 Difference]: Finished difference Result 1360 states and 1821 transitions. [2022-07-13 21:07:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:07:33,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 21:07:33,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:33,810 INFO L225 Difference]: With dead ends: 1360 [2022-07-13 21:07:33,810 INFO L226 Difference]: Without dead ends: 1188 [2022-07-13 21:07:33,811 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 [2022-07-13 21:07:33,812 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 711 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:33,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 877 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 21:07:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-07-13 21:07:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1126. [2022-07-13 21:07:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2690763052208835) internal successors, (1264), 1014 states have internal predecessors, (1264), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-13 21:07:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1451 transitions. [2022-07-13 21:07:33,859 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1451 transitions. Word has length 91 [2022-07-13 21:07:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:33,859 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1451 transitions. [2022-07-13 21:07:33,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1451 transitions. [2022-07-13 21:07:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 21:07:33,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:33,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:33,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:07:33,861 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash -190212564, now seen corresponding path program 1 times [2022-07-13 21:07:33,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:33,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829433795] [2022-07-13 21:07:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:33,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:33,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829433795] [2022-07-13 21:07:33,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829433795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:33,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:33,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:07:33,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174806170] [2022-07-13 21:07:33,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:33,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:07:33,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:33,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:07:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:33,931 INFO L87 Difference]: Start difference. First operand 1126 states and 1451 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:34,423 INFO L93 Difference]: Finished difference Result 1359 states and 1816 transitions. [2022-07-13 21:07:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:07:34,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 21:07:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:34,428 INFO L225 Difference]: With dead ends: 1359 [2022-07-13 21:07:34,428 INFO L226 Difference]: Without dead ends: 1187 [2022-07-13 21:07:34,429 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 [2022-07-13 21:07:34,430 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 709 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:34,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 873 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 21:07:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2022-07-13 21:07:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1126. [2022-07-13 21:07:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2680722891566265) internal successors, (1263), 1014 states have internal predecessors, (1263), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-07-13 21:07:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1450 transitions. [2022-07-13 21:07:34,477 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1450 transitions. Word has length 91 [2022-07-13 21:07:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:34,478 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1450 transitions. [2022-07-13 21:07:34,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1450 transitions. [2022-07-13 21:07:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 21:07:34,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:34,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:34,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:07:34,480 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2101255122, now seen corresponding path program 1 times [2022-07-13 21:07:34,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:34,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051244770] [2022-07-13 21:07:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:34,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:34,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:34,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:34,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:34,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:34,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:34,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:34,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051244770] [2022-07-13 21:07:34,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051244770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:34,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:34,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:07:34,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063007039] [2022-07-13 21:07:34,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:34,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:07:34,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:34,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:07:34,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:34,547 INFO L87 Difference]: Start difference. First operand 1126 states and 1450 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:35,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:35,710 INFO L93 Difference]: Finished difference Result 1602 states and 2197 transitions. [2022-07-13 21:07:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 21:07:35,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 21:07:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:35,716 INFO L225 Difference]: With dead ends: 1602 [2022-07-13 21:07:35,716 INFO L226 Difference]: Without dead ends: 1430 [2022-07-13 21:07:35,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:07:35,718 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 810 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:35,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 2043 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 21:07:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-07-13 21:07:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1314. [2022-07-13 21:07:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1160 states have (on average 1.306896551724138) internal successors, (1516), 1180 states have internal predecessors, (1516), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (133), 85 states have call predecessors, (133), 90 states have call successors, (133) [2022-07-13 21:07:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1742 transitions. [2022-07-13 21:07:35,784 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1742 transitions. Word has length 91 [2022-07-13 21:07:35,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:35,784 INFO L495 AbstractCegarLoop]: Abstraction has 1314 states and 1742 transitions. [2022-07-13 21:07:35,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1742 transitions. [2022-07-13 21:07:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 21:07:35,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:35,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:35,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:07:35,787 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2024354324, now seen corresponding path program 1 times [2022-07-13 21:07:35,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:35,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793304798] [2022-07-13 21:07:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:35,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:35,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:35,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:35,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:35,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:35,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:35,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:35,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793304798] [2022-07-13 21:07:35,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793304798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:35,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:35,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:07:35,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492047352] [2022-07-13 21:07:35,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:35,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:07:35,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:35,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:07:35,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:35,866 INFO L87 Difference]: Start difference. First operand 1314 states and 1742 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:37,083 INFO L93 Difference]: Finished difference Result 2378 states and 3404 transitions. [2022-07-13 21:07:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 21:07:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 21:07:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:37,090 INFO L225 Difference]: With dead ends: 2378 [2022-07-13 21:07:37,090 INFO L226 Difference]: Without dead ends: 2020 [2022-07-13 21:07:37,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-13 21:07:37,092 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 988 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:37,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 1903 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 21:07:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2022-07-13 21:07:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1666. [2022-07-13 21:07:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1470 states have (on average 1.35578231292517) internal successors, (1993), 1494 states have internal predecessors, (1993), 119 states have call successors, (119), 62 states have call predecessors, (119), 75 states have return successors, (175), 113 states have call predecessors, (175), 116 states have call successors, (175) [2022-07-13 21:07:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2287 transitions. [2022-07-13 21:07:37,165 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2287 transitions. Word has length 91 [2022-07-13 21:07:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:37,165 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2287 transitions. [2022-07-13 21:07:37,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2287 transitions. [2022-07-13 21:07:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 21:07:37,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:37,168 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:37,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 21:07:37,168 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1303262318, now seen corresponding path program 1 times [2022-07-13 21:07:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:37,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115885351] [2022-07-13 21:07:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:37,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:37,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:37,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:37,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:37,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:37,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:37,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:37,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115885351] [2022-07-13 21:07:37,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115885351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:37,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:37,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:07:37,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096910331] [2022-07-13 21:07:37,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:37,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:07:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:07:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:37,254 INFO L87 Difference]: Start difference. First operand 1666 states and 2287 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:38,459 INFO L93 Difference]: Finished difference Result 3745 states and 5549 transitions. [2022-07-13 21:07:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 21:07:38,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 21:07:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:38,469 INFO L225 Difference]: With dead ends: 3745 [2022-07-13 21:07:38,469 INFO L226 Difference]: Without dead ends: 3035 [2022-07-13 21:07:38,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-13 21:07:38,471 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 1008 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:38,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 1748 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 21:07:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2022-07-13 21:07:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2350. [2022-07-13 21:07:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2066 states have (on average 1.40513068731849) internal successors, (2903), 2104 states have internal predecessors, (2903), 169 states have call successors, (169), 86 states have call predecessors, (169), 113 states have return successors, (281), 167 states have call predecessors, (281), 166 states have call successors, (281) [2022-07-13 21:07:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3353 transitions. [2022-07-13 21:07:38,571 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3353 transitions. Word has length 91 [2022-07-13 21:07:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:38,571 INFO L495 AbstractCegarLoop]: Abstraction has 2350 states and 3353 transitions. [2022-07-13 21:07:38,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3353 transitions. [2022-07-13 21:07:38,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 21:07:38,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:38,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:38,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 21:07:38,574 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:38,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:38,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1083247188, now seen corresponding path program 1 times [2022-07-13 21:07:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973718376] [2022-07-13 21:07:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:38,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:38,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:38,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:38,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:38,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:38,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:38,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:38,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973718376] [2022-07-13 21:07:38,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973718376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:38,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:38,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:07:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622754741] [2022-07-13 21:07:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:07:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:07:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:38,650 INFO L87 Difference]: Start difference. First operand 2350 states and 3353 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:39,839 INFO L93 Difference]: Finished difference Result 6370 states and 9715 transitions. [2022-07-13 21:07:39,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 21:07:39,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 21:07:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:39,855 INFO L225 Difference]: With dead ends: 6370 [2022-07-13 21:07:39,856 INFO L226 Difference]: Without dead ends: 4976 [2022-07-13 21:07:39,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-13 21:07:39,861 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 1095 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:39,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 1753 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:07:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2022-07-13 21:07:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3808. [2022-07-13 21:07:40,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3334 states have (on average 1.455608878224355) internal successors, (4853), 3418 states have internal predecessors, (4853), 265 states have call successors, (265), 134 states have call predecessors, (265), 207 states have return successors, (585), 271 states have call predecessors, (585), 262 states have call successors, (585) [2022-07-13 21:07:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5703 transitions. [2022-07-13 21:07:40,054 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5703 transitions. Word has length 91 [2022-07-13 21:07:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:40,054 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5703 transitions. [2022-07-13 21:07:40,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5703 transitions. [2022-07-13 21:07:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 21:07:40,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:40,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:40,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 21:07:40,059 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1575873362, now seen corresponding path program 1 times [2022-07-13 21:07:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:40,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44313106] [2022-07-13 21:07:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:40,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:40,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44313106] [2022-07-13 21:07:40,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44313106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:40,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:40,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:07:40,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876892781] [2022-07-13 21:07:40,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:40,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:07:40,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:07:40,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:40,115 INFO L87 Difference]: Start difference. First operand 3808 states and 5703 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:40,754 INFO L93 Difference]: Finished difference Result 7689 states and 12021 transitions. [2022-07-13 21:07:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:07:40,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 21:07:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:40,768 INFO L225 Difference]: With dead ends: 7689 [2022-07-13 21:07:40,768 INFO L226 Difference]: Without dead ends: 4835 [2022-07-13 21:07:40,774 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 [2022-07-13 21:07:40,775 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 612 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:40,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1005 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 21:07:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2022-07-13 21:07:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 3808. [2022-07-13 21:07:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3334 states have (on average 1.4505098980203959) internal successors, (4836), 3418 states have internal predecessors, (4836), 265 states have call successors, (265), 134 states have call predecessors, (265), 207 states have return successors, (585), 271 states have call predecessors, (585), 262 states have call successors, (585) [2022-07-13 21:07:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5686 transitions. [2022-07-13 21:07:40,982 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5686 transitions. Word has length 91 [2022-07-13 21:07:40,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:40,982 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5686 transitions. [2022-07-13 21:07:40,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5686 transitions. [2022-07-13 21:07:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 21:07:40,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:40,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:40,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 21:07:40,986 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:40,987 INFO L85 PathProgramCache]: Analyzing trace with hash -621933204, now seen corresponding path program 1 times [2022-07-13 21:07:40,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:40,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830170622] [2022-07-13 21:07:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:40,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:41,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:41,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:41,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:41,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:41,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:41,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830170622] [2022-07-13 21:07:41,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830170622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:41,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:41,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:07:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579293486] [2022-07-13 21:07:41,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:41,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:07:41,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:41,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:07:41,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:07:41,044 INFO L87 Difference]: Start difference. First operand 3808 states and 5686 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:42,125 INFO L93 Difference]: Finished difference Result 9304 states and 14395 transitions. [2022-07-13 21:07:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:07:42,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-07-13 21:07:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:42,144 INFO L225 Difference]: With dead ends: 9304 [2022-07-13 21:07:42,144 INFO L226 Difference]: Without dead ends: 6452 [2022-07-13 21:07:42,153 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 [2022-07-13 21:07:42,153 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 956 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:42,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 1335 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 21:07:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6452 states. [2022-07-13 21:07:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6452 to 5140. [2022-07-13 21:07:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5140 states, 4494 states have (on average 1.4581664441477526) internal successors, (6553), 4606 states have internal predecessors, (6553), 369 states have call successors, (369), 182 states have call predecessors, (369), 275 states have return successors, (753), 367 states have call predecessors, (753), 366 states have call successors, (753) [2022-07-13 21:07:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5140 states to 5140 states and 7675 transitions. [2022-07-13 21:07:42,414 INFO L78 Accepts]: Start accepts. Automaton has 5140 states and 7675 transitions. Word has length 91 [2022-07-13 21:07:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:42,414 INFO L495 AbstractCegarLoop]: Abstraction has 5140 states and 7675 transitions. [2022-07-13 21:07:42,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 5140 states and 7675 transitions. [2022-07-13 21:07:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 21:07:42,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:42,420 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] [2022-07-13 21:07:42,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 21:07:42,420 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1212598261, now seen corresponding path program 1 times [2022-07-13 21:07:42,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:42,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110180295] [2022-07-13 21:07:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:42,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:42,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:42,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:42,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:07:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:42,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 21:07:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:42,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 21:07:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 21:07:42,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:42,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110180295] [2022-07-13 21:07:42,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110180295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:42,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260293161] [2022-07-13 21:07:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:42,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:42,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:42,469 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) [2022-07-13 21:07:42,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:07:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:42,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 21:07:42,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:42,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260293161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:42,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:42,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 21:07:42,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043488787] [2022-07-13 21:07:42,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:42,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:42,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:42,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:42,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:42,556 INFO L87 Difference]: Start difference. First operand 5140 states and 7675 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 21:07:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:42,732 INFO L93 Difference]: Finished difference Result 5517 states and 8136 transitions. [2022-07-13 21:07:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:42,732 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 [2022-07-13 21:07:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:42,741 INFO L225 Difference]: With dead ends: 5517 [2022-07-13 21:07:42,741 INFO L226 Difference]: Without dead ends: 4199 [2022-07-13 21:07:42,743 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 [2022-07-13 21:07:42,743 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 61 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:42,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 751 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2022-07-13 21:07:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 4199. [2022-07-13 21:07:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4199 states, 3656 states have (on average 1.512035010940919) internal successors, (5528), 3752 states have internal predecessors, (5528), 312 states have call successors, (312), 145 states have call predecessors, (312), 230 states have return successors, (661), 317 states have call predecessors, (661), 310 states have call successors, (661) [2022-07-13 21:07:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6501 transitions. [2022-07-13 21:07:42,916 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6501 transitions. Word has length 103 [2022-07-13 21:07:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:42,917 INFO L495 AbstractCegarLoop]: Abstraction has 4199 states and 6501 transitions. [2022-07-13 21:07:42,917 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) [2022-07-13 21:07:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6501 transitions. [2022-07-13 21:07:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-13 21:07:42,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:42,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:42,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:43,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:43,131 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 938550496, now seen corresponding path program 1 times [2022-07-13 21:07:43,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538755380] [2022-07-13 21:07:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:43,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:43,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:43,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:43,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:43,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:43,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:43,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-13 21:07:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:43,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:43,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:07:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 21:07:43,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:43,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538755380] [2022-07-13 21:07:43,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538755380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:43,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405982170] [2022-07-13 21:07:43,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:43,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:43,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:43,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:43,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:07:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:43,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:43,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 21:07:43,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:43,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405982170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:43,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:43,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 21:07:43,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025930755] [2022-07-13 21:07:43,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:43,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:43,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:43,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:43,343 INFO L87 Difference]: Start difference. First operand 4199 states and 6501 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:07:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:43,643 INFO L93 Difference]: Finished difference Result 12445 states and 19391 transitions. [2022-07-13 21:07:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:43,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 147 [2022-07-13 21:07:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:43,681 INFO L225 Difference]: With dead ends: 12445 [2022-07-13 21:07:43,681 INFO L226 Difference]: Without dead ends: 8261 [2022-07-13 21:07:43,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:43,692 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 224 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:43,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8261 states. [2022-07-13 21:07:44,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8261 to 8209. [2022-07-13 21:07:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8209 states, 7156 states have (on average 1.5125768585802124) internal successors, (10824), 7346 states have internal predecessors, (10824), 592 states have call successors, (592), 289 states have call predecessors, (592), 460 states have return successors, (1261), 589 states have call predecessors, (1261), 590 states have call successors, (1261) [2022-07-13 21:07:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8209 states to 8209 states and 12677 transitions. [2022-07-13 21:07:44,085 INFO L78 Accepts]: Start accepts. Automaton has 8209 states and 12677 transitions. Word has length 147 [2022-07-13 21:07:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:44,085 INFO L495 AbstractCegarLoop]: Abstraction has 8209 states and 12677 transitions. [2022-07-13 21:07:44,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:07:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 8209 states and 12677 transitions. [2022-07-13 21:07:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-13 21:07:44,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:44,095 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:44,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 21:07:44,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:44,329 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1136564032, now seen corresponding path program 1 times [2022-07-13 21:07:44,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:44,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475276354] [2022-07-13 21:07:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:44,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-13 21:07:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:07:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 21:07:44,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:44,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475276354] [2022-07-13 21:07:44,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475276354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:44,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702780766] [2022-07-13 21:07:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:44,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:44,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:44,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:44,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 21:07:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:44,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 21:07:44,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:44,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702780766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:44,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:44,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 21:07:44,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055939966] [2022-07-13 21:07:44,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:44,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:44,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:44,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:44,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:44,571 INFO L87 Difference]: Start difference. First operand 8209 states and 12677 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:07:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:45,195 INFO L93 Difference]: Finished difference Result 24427 states and 37983 transitions. [2022-07-13 21:07:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:45,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 147 [2022-07-13 21:07:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:45,240 INFO L225 Difference]: With dead ends: 24427 [2022-07-13 21:07:45,241 INFO L226 Difference]: Without dead ends: 16233 [2022-07-13 21:07:45,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:45,265 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 212 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:45,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16233 states. [2022-07-13 21:07:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16233 to 16133. [2022-07-13 21:07:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16133 states, 14060 states have (on average 1.5112375533428164) internal successors, (21248), 14438 states have internal predecessors, (21248), 1152 states have call successors, (1152), 577 states have call predecessors, (1152), 920 states have return successors, (2461), 1133 states have call predecessors, (2461), 1150 states have call successors, (2461) [2022-07-13 21:07:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16133 states to 16133 states and 24861 transitions. [2022-07-13 21:07:46,121 INFO L78 Accepts]: Start accepts. Automaton has 16133 states and 24861 transitions. Word has length 147 [2022-07-13 21:07:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:46,121 INFO L495 AbstractCegarLoop]: Abstraction has 16133 states and 24861 transitions. [2022-07-13 21:07:46,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:07:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 16133 states and 24861 transitions. [2022-07-13 21:07:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-13 21:07:46,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:46,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:46,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:46,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:46,355 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:46,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:46,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1659927712, now seen corresponding path program 1 times [2022-07-13 21:07:46,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:46,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828948012] [2022-07-13 21:07:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:46,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:46,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:46,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:46,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:46,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:46,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:46,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-13 21:07:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:46,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:46,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:07:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 21:07:46,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:46,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828948012] [2022-07-13 21:07:46,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828948012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:46,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942099096] [2022-07-13 21:07:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:46,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:46,449 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:46,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 21:07:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:46,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:46,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 21:07:46,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:46,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942099096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:46,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:46,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 21:07:46,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885530363] [2022-07-13 21:07:46,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:46,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:46,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:46,565 INFO L87 Difference]: Start difference. First operand 16133 states and 24861 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 21:07:47,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:47,876 INFO L93 Difference]: Finished difference Result 47731 states and 74283 transitions. [2022-07-13 21:07:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:47,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 147 [2022-07-13 21:07:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:47,994 INFO L225 Difference]: With dead ends: 47731 [2022-07-13 21:07:47,995 INFO L226 Difference]: Without dead ends: 31615 [2022-07-13 21:07:48,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:48,035 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 229 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:48,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 782 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31615 states. [2022-07-13 21:07:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31615 to 31615. [2022-07-13 21:07:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31615 states, 27537 states have (on average 1.503431746377601) internal successors, (41400), 28260 states have internal predecessors, (41400), 2237 states have call successors, (2237), 1153 states have call predecessors, (2237), 1840 states have return successors, (5363), 2233 states have call predecessors, (5363), 2235 states have call successors, (5363) [2022-07-13 21:07:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31615 states to 31615 states and 49000 transitions. [2022-07-13 21:07:49,764 INFO L78 Accepts]: Start accepts. Automaton has 31615 states and 49000 transitions. Word has length 147 [2022-07-13 21:07:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:49,765 INFO L495 AbstractCegarLoop]: Abstraction has 31615 states and 49000 transitions. [2022-07-13 21:07:49,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 21:07:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 31615 states and 49000 transitions. [2022-07-13 21:07:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-13 21:07:49,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:49,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:49,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:50,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-13 21:07:50,055 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:50,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1981268215, now seen corresponding path program 1 times [2022-07-13 21:07:50,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:50,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414404685] [2022-07-13 21:07:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:50,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-13 21:07:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-07-13 21:07:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-07-13 21:07:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-13 21:07:50,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:50,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414404685] [2022-07-13 21:07:50,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414404685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:50,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589586831] [2022-07-13 21:07:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:50,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:50,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:50,146 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:50,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 21:07:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:50,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 21:07:50,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:50,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589586831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:50,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:50,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 21:07:50,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641147816] [2022-07-13 21:07:50,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:50,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:50,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:50,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:50,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:50,375 INFO L87 Difference]: Start difference. First operand 31615 states and 49000 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-13 21:07:52,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:52,914 INFO L93 Difference]: Finished difference Result 93763 states and 146572 transitions. [2022-07-13 21:07:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:52,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 191 [2022-07-13 21:07:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:53,129 INFO L225 Difference]: With dead ends: 93763 [2022-07-13 21:07:53,129 INFO L226 Difference]: Without dead ends: 62171 [2022-07-13 21:07:53,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:53,221 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 164 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:53,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62171 states. [2022-07-13 21:07:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62171 to 61783. [2022-07-13 21:07:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61783 states, 53881 states have (on average 1.5037582821402722) internal successors, (81024), 55324 states have internal predecessors, (81024), 4245 states have call successors, (4245), 2281 states have call predecessors, (4245), 3656 states have return successors, (10321), 4209 states have call predecessors, (10321), 4243 states have call successors, (10321) [2022-07-13 21:07:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61783 states to 61783 states and 95590 transitions. [2022-07-13 21:07:56,673 INFO L78 Accepts]: Start accepts. Automaton has 61783 states and 95590 transitions. Word has length 191 [2022-07-13 21:07:56,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:56,674 INFO L495 AbstractCegarLoop]: Abstraction has 61783 states and 95590 transitions. [2022-07-13 21:07:56,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-13 21:07:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 61783 states and 95590 transitions. [2022-07-13 21:07:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-13 21:07:56,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:56,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:56,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:57,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-13 21:07:57,005 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:57,006 INFO L85 PathProgramCache]: Analyzing trace with hash -275882679, now seen corresponding path program 1 times [2022-07-13 21:07:57,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:57,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528524417] [2022-07-13 21:07:57,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:57,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:07:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:07:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:07:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-13 21:07:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-13 21:07:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-07-13 21:07:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-13 21:07:57,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:57,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528524417] [2022-07-13 21:07:57,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528524417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:57,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695193506] [2022-07-13 21:07:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:57,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:57,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:57,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 21:07:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:57,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:57,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 21:07:57,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:57,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695193506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:57,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:57,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 21:07:57,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296317891] [2022-07-13 21:07:57,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:57,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:57,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:57,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:57,283 INFO L87 Difference]: Start difference. First operand 61783 states and 95590 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-13 21:08:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:02,645 INFO L93 Difference]: Finished difference Result 183883 states and 287012 transitions. [2022-07-13 21:08:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:08:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 191 [2022-07-13 21:08:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:03,067 INFO L225 Difference]: With dead ends: 183883 [2022-07-13 21:08:03,067 INFO L226 Difference]: Without dead ends: 122123 [2022-07-13 21:08:03,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:08:03,223 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 166 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:03,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 550 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:08:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122123 states. [2022-07-13 21:08:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122123 to 121351. [2022-07-13 21:08:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121351 states, 105801 states have (on average 1.5021408115235206) internal successors, (158928), 108684 states have internal predecessors, (158928), 8261 states have call successors, (8261), 4537 states have call predecessors, (8261), 7288 states have return successors, (20237), 8161 states have call predecessors, (20237), 8259 states have call successors, (20237) [2022-07-13 21:08:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121351 states to 121351 states and 187426 transitions. [2022-07-13 21:08:09,881 INFO L78 Accepts]: Start accepts. Automaton has 121351 states and 187426 transitions. Word has length 191 [2022-07-13 21:08:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:09,882 INFO L495 AbstractCegarLoop]: Abstraction has 121351 states and 187426 transitions. [2022-07-13 21:08:09,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-13 21:08:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 121351 states and 187426 transitions. [2022-07-13 21:08:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-13 21:08:10,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:10,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:08:10,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 21:08:10,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-13 21:08:10,367 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:10,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1664764034, now seen corresponding path program 1 times [2022-07-13 21:08:10,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:10,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337775681] [2022-07-13 21:08:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:10,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:08:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:08:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:08:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:08:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-13 21:08:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-13 21:08:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:08:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-13 21:08:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:08:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-07-13 21:08:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-13 21:08:10,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:10,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337775681] [2022-07-13 21:08:10,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337775681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:08:10,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800810284] [2022-07-13 21:08:10,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:10,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:08:10,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:08:10,447 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:08:10,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 21:08:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:10,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:08:10,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:08:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 21:08:10,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:08:10,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800810284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:10,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:08:10,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 21:08:10,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627673486] [2022-07-13 21:08:10,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:10,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:08:10,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:10,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:08:10,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:08:10,643 INFO L87 Difference]: Start difference. First operand 121351 states and 187426 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-13 21:08:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:16,129 INFO L93 Difference]: Finished difference Result 183557 states and 284310 transitions. [2022-07-13 21:08:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:08:16,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 210 [2022-07-13 21:08:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:16,449 INFO L225 Difference]: With dead ends: 183557 [2022-07-13 21:08:16,449 INFO L226 Difference]: Without dead ends: 100009 [2022-07-13 21:08:16,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:08:16,591 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 191 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:16,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 323 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:08:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100009 states. [2022-07-13 21:08:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100009 to 70241. [2022-07-13 21:08:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70241 states, 61783 states have (on average 1.4456727578783808) internal successors, (89318), 62722 states have internal predecessors, (89318), 4763 states have call successors, (4763), 2831 states have call predecessors, (4763), 3694 states have return successors, (8641), 4705 states have call predecessors, (8641), 4761 states have call successors, (8641) [2022-07-13 21:08:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70241 states to 70241 states and 102722 transitions. [2022-07-13 21:08:21,267 INFO L78 Accepts]: Start accepts. Automaton has 70241 states and 102722 transitions. Word has length 210 [2022-07-13 21:08:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:21,267 INFO L495 AbstractCegarLoop]: Abstraction has 70241 states and 102722 transitions. [2022-07-13 21:08:21,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-13 21:08:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 70241 states and 102722 transitions. [2022-07-13 21:08:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-13 21:08:21,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:21,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 21:08:21,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 21:08:21,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 21:08:21,598 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:21,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:21,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2010802143, now seen corresponding path program 1 times [2022-07-13 21:08:21,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:21,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950038821] [2022-07-13 21:08:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:21,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 21:08:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:08:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 21:08:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 21:08:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-13 21:08:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-13 21:08:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:08:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-13 21:08:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:08:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-07-13 21:08:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 21:08:21,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:21,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950038821] [2022-07-13 21:08:21,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950038821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:08:21,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912049265] [2022-07-13 21:08:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:21,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:08:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:08:21,703 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:08:21,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 21:08:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:21,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 21:08:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:08:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-13 21:08:21,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:08:21,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912049265] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:21,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:08:21,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 21:08:21,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733261250] [2022-07-13 21:08:21,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:21,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:08:21,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:21,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:08:21,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:08:21,862 INFO L87 Difference]: Start difference. First operand 70241 states and 102722 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)