./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label33.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/eca-rers2012/Problem12_label33.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 18ad5ec6bc1db1d6d896db79319bb0ca45f8aff62ac630628a891f63c8426bb4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:27:19,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:27:19,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:27:19,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:27:19,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:27:19,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:27:19,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:27:19,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:27:19,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:27:19,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:27:19,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:27:19,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:27:19,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:27:19,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:27:19,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:27:19,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:27:19,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:27:19,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:27:19,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:27:19,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:27:19,515 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:27:19,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:27:19,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:27:19,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:27:19,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:27:19,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:27:19,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:27:19,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:27:19,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:27:19,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:27:19,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:27:19,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:27:19,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:27:19,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:27:19,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:27:19,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:27:19,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:27:19,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:27:19,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:27:19,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:27:19,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:27:19,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:27:19,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:27:19,564 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:27:19,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:27:19,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:27:19,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:27:19,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:27:19,566 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:27:19,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:27:19,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:27:19,567 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:27:19,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:27:19,568 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:27:19,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:27:19,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:27:19,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:27:19,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:27:19,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:27:19,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:27:19,570 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:27:19,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:27:19,570 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:27:19,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:27:19,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:27:19,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:27:19,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:27:19,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:27:19,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:27:19,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:27:19,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:27:19,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:27:19,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:27:19,573 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:27:19,573 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:27:19,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:27:19,574 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18ad5ec6bc1db1d6d896db79319bb0ca45f8aff62ac630628a891f63c8426bb4 [2022-07-22 12:27:19,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:27:19,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:27:19,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:27:19,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:27:19,834 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:27:19,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label33.c [2022-07-22 12:27:19,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b753aa90/22ee31f0ebb944c09e9713729a8818e8/FLAG20d20aed7 [2022-07-22 12:27:20,472 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:27:20,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label33.c [2022-07-22 12:27:20,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b753aa90/22ee31f0ebb944c09e9713729a8818e8/FLAG20d20aed7 [2022-07-22 12:27:20,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b753aa90/22ee31f0ebb944c09e9713729a8818e8 [2022-07-22 12:27:20,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:27:20,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:27:20,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:27:20,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:27:20,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:27:20,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:27:20" (1/1) ... [2022-07-22 12:27:20,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310d0940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:20, skipping insertion in model container [2022-07-22 12:27:20,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:27:20" (1/1) ... [2022-07-22 12:27:20,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:27:20,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:27:21,072 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/eca-rers2012/Problem12_label33.c[6146,6159] [2022-07-22 12:27:21,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:27:21,756 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:27:21,785 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/eca-rers2012/Problem12_label33.c[6146,6159] [2022-07-22 12:27:22,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:27:22,161 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:27:22,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22 WrapperNode [2022-07-22 12:27:22,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:27:22,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:27:22,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:27:22,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:27:22,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (1/1) ... [2022-07-22 12:27:22,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (1/1) ... [2022-07-22 12:27:22,507 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-22 12:27:22,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:27:22,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:27:22,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:27:22,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:27:22,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (1/1) ... [2022-07-22 12:27:22,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (1/1) ... [2022-07-22 12:27:22,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (1/1) ... [2022-07-22 12:27:22,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (1/1) ... [2022-07-22 12:27:22,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (1/1) ... [2022-07-22 12:27:22,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (1/1) ... [2022-07-22 12:27:22,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (1/1) ... [2022-07-22 12:27:22,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:27:22,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:27:22,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:27:22,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:27:22,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (1/1) ... [2022-07-22 12:27:22,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:27:22,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:27:22,949 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) [2022-07-22 12:27:22,983 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 [2022-07-22 12:27:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:27:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:27:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:27:23,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:27:23,144 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:27:23,145 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:27:26,465 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:27:26,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:27:26,482 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:27:26,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:27:26 BoogieIcfgContainer [2022-07-22 12:27:26,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:27:26,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:27:26,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:27:26,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:27:26,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:27:20" (1/3) ... [2022-07-22 12:27:26,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7a33c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:27:26, skipping insertion in model container [2022-07-22 12:27:26,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:27:22" (2/3) ... [2022-07-22 12:27:26,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7a33c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:27:26, skipping insertion in model container [2022-07-22 12:27:26,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:27:26" (3/3) ... [2022-07-22 12:27:26,493 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label33.c [2022-07-22 12:27:26,505 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:27:26,505 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:27:26,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:27:26,586 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@15d29565, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76047a49 [2022-07-22 12:27:26,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:27:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 12:27:26,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:26,615 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] [2022-07-22 12:27:26,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2022-07-22 12:27:26,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:26,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683754387] [2022-07-22 12:27:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:26,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:27:26,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:26,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683754387] [2022-07-22 12:27:26,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683754387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:26,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:26,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:27:26,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298810885] [2022-07-22 12:27:26,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:26,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:27:26,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:26,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:27:26,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:27:26,954 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:33,281 INFO L93 Difference]: Finished difference Result 3142 states and 6130 transitions. [2022-07-22 12:27:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:27:33,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-22 12:27:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:33,308 INFO L225 Difference]: With dead ends: 3142 [2022-07-22 12:27:33,308 INFO L226 Difference]: Without dead ends: 2257 [2022-07-22 12:27:33,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:27:33,316 INFO L413 NwaCegarLoop]: 738 mSDtfsCounter, 2215 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5499 mSolverCounterSat, 1281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2215 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 6780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1281 IncrementalHoareTripleChecker+Valid, 5499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:33,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2215 Valid, 765 Invalid, 6780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1281 Valid, 5499 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-07-22 12:27:33,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2022-07-22 12:27:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2022-07-22 12:27:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.5749113475177305) internal successors, (3553), 2256 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3553 transitions. [2022-07-22 12:27:33,437 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3553 transitions. Word has length 49 [2022-07-22 12:27:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:33,439 INFO L495 AbstractCegarLoop]: Abstraction has 2257 states and 3553 transitions. [2022-07-22 12:27:33,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3553 transitions. [2022-07-22 12:27:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 12:27:33,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:33,449 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:27:33,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:27:33,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2123608565, now seen corresponding path program 1 times [2022-07-22 12:27:33,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:33,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805345812] [2022-07-22 12:27:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:33,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:27:33,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:33,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805345812] [2022-07-22 12:27:33,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805345812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:33,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:33,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:27:33,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044287899] [2022-07-22 12:27:33,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:33,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:27:33,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:33,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:27:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:27:33,632 INFO L87 Difference]: Start difference. First operand 2257 states and 3553 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:37,153 INFO L93 Difference]: Finished difference Result 6051 states and 9916 transitions. [2022-07-22 12:27:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:27:37,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-22 12:27:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:37,172 INFO L225 Difference]: With dead ends: 6051 [2022-07-22 12:27:37,172 INFO L226 Difference]: Without dead ends: 3759 [2022-07-22 12:27:37,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:27:37,177 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 705 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3095 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 3824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 3095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:37,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 688 Invalid, 3824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 3095 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-22 12:27:37,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2022-07-22 12:27:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3008. [2022-07-22 12:27:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4319920186232125) internal successors, (4306), 3007 states have internal predecessors, (4306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4306 transitions. [2022-07-22 12:27:37,230 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4306 transitions. Word has length 120 [2022-07-22 12:27:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:37,230 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4306 transitions. [2022-07-22 12:27:37,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4306 transitions. [2022-07-22 12:27:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-07-22 12:27:37,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:37,235 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-07-22 12:27:37,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:27:37,235 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:37,236 INFO L85 PathProgramCache]: Analyzing trace with hash -819857147, now seen corresponding path program 1 times [2022-07-22 12:27:37,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:37,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652550895] [2022-07-22 12:27:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:37,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-22 12:27:37,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:37,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652550895] [2022-07-22 12:27:37,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652550895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:37,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:37,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:27:37,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231114014] [2022-07-22 12:27:37,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:37,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:27:37,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:37,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:27:37,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:37,446 INFO L87 Difference]: Start difference. First operand 3008 states and 4306 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:39,814 INFO L93 Difference]: Finished difference Result 8267 states and 11519 transitions. [2022-07-22 12:27:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:27:39,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2022-07-22 12:27:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:39,831 INFO L225 Difference]: With dead ends: 8267 [2022-07-22 12:27:39,831 INFO L226 Difference]: Without dead ends: 5261 [2022-07-22 12:27:39,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:39,837 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 697 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:39,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 427 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:27:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2022-07-22 12:27:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2022-07-22 12:27:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.1982889733840305) internal successors, (6303), 5260 states have internal predecessors, (6303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6303 transitions. [2022-07-22 12:27:39,928 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6303 transitions. Word has length 259 [2022-07-22 12:27:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:39,929 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 6303 transitions. [2022-07-22 12:27:39,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:39,930 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6303 transitions. [2022-07-22 12:27:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-22 12:27:39,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:39,934 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, 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, 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, 1, 1, 1, 1] [2022-07-22 12:27:39,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:27:39,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2005660694, now seen corresponding path program 1 times [2022-07-22 12:27:39,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:39,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682636002] [2022-07-22 12:27:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:39,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 12:27:40,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:40,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682636002] [2022-07-22 12:27:40,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682636002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:40,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:40,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:27:40,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085746337] [2022-07-22 12:27:40,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:40,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:27:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:40,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:27:40,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:27:40,173 INFO L87 Difference]: Start difference. First operand 5261 states and 6303 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:43,378 INFO L93 Difference]: Finished difference Result 12061 states and 15068 transitions. [2022-07-22 12:27:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:27:43,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2022-07-22 12:27:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:43,407 INFO L225 Difference]: With dead ends: 12061 [2022-07-22 12:27:43,408 INFO L226 Difference]: Without dead ends: 7516 [2022-07-22 12:27:43,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:27:43,423 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 776 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3718 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 4260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 3718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:43,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 327 Invalid, 4260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 3718 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 12:27:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2022-07-22 12:27:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 7514. [2022-07-22 12:27:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 1.1812857713296951) internal successors, (8875), 7513 states have internal predecessors, (8875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 8875 transitions. [2022-07-22 12:27:43,547 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 8875 transitions. Word has length 261 [2022-07-22 12:27:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:43,548 INFO L495 AbstractCegarLoop]: Abstraction has 7514 states and 8875 transitions. [2022-07-22 12:27:43,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 8875 transitions. [2022-07-22 12:27:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-07-22 12:27:43,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:43,554 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:27:43,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:27:43,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1457848671, now seen corresponding path program 1 times [2022-07-22 12:27:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:43,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858767459] [2022-07-22 12:27:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:43,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 12:27:43,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:43,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858767459] [2022-07-22 12:27:43,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858767459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:43,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:43,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:27:43,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068944434] [2022-07-22 12:27:43,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:43,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:27:43,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:43,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:27:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:43,795 INFO L87 Difference]: Start difference. First operand 7514 states and 8875 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:46,368 INFO L93 Difference]: Finished difference Result 16528 states and 20146 transitions. [2022-07-22 12:27:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:27:46,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2022-07-22 12:27:46,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:46,398 INFO L225 Difference]: With dead ends: 16528 [2022-07-22 12:27:46,398 INFO L226 Difference]: Without dead ends: 9767 [2022-07-22 12:27:46,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:46,407 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 826 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 989 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:46,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 139 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [989 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:27:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2022-07-22 12:27:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2022-07-22 12:27:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.207352037681753) internal successors, (11791), 9766 states have internal predecessors, (11791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 11791 transitions. [2022-07-22 12:27:46,538 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 11791 transitions. Word has length 338 [2022-07-22 12:27:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:46,539 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 11791 transitions. [2022-07-22 12:27:46,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 11791 transitions. [2022-07-22 12:27:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-07-22 12:27:46,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:46,545 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:27:46,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:27:46,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:46,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1945795235, now seen corresponding path program 1 times [2022-07-22 12:27:46,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:46,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548166614] [2022-07-22 12:27:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 12:27:46,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:46,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548166614] [2022-07-22 12:27:46,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548166614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:46,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:46,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:27:46,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165852230] [2022-07-22 12:27:46,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:46,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:27:46,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:46,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:27:46,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:46,734 INFO L87 Difference]: Start difference. First operand 9767 states and 11791 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:49,329 INFO L93 Difference]: Finished difference Result 21034 states and 25744 transitions. [2022-07-22 12:27:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:27:49,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 362 [2022-07-22 12:27:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:49,356 INFO L225 Difference]: With dead ends: 21034 [2022-07-22 12:27:49,356 INFO L226 Difference]: Without dead ends: 12020 [2022-07-22 12:27:49,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:49,364 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:49,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 105 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:27:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2022-07-22 12:27:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 12020. [2022-07-22 12:27:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.1926116981446044) internal successors, (14334), 12019 states have internal predecessors, (14334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14334 transitions. [2022-07-22 12:27:49,526 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14334 transitions. Word has length 362 [2022-07-22 12:27:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:49,526 INFO L495 AbstractCegarLoop]: Abstraction has 12020 states and 14334 transitions. [2022-07-22 12:27:49,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14334 transitions. [2022-07-22 12:27:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-07-22 12:27:49,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:49,534 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-22 12:27:49,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:27:49,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash 982786, now seen corresponding path program 1 times [2022-07-22 12:27:49,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:49,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971889265] [2022-07-22 12:27:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:49,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-22 12:27:49,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:49,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971889265] [2022-07-22 12:27:49,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971889265] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:49,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:49,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:27:49,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922329905] [2022-07-22 12:27:49,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:49,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:27:49,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:49,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:27:49,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:49,682 INFO L87 Difference]: Start difference. First operand 12020 states and 14334 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:52,595 INFO L93 Difference]: Finished difference Result 33801 states and 40725 transitions. [2022-07-22 12:27:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:27:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 376 [2022-07-22 12:27:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:52,640 INFO L225 Difference]: With dead ends: 33801 [2022-07-22 12:27:52,640 INFO L226 Difference]: Without dead ends: 22534 [2022-07-22 12:27:52,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:52,654 INFO L413 NwaCegarLoop]: 1322 mSDtfsCounter, 635 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2678 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 2678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:52,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1330 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 2678 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:27:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2022-07-22 12:27:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 21032. [2022-07-22 12:27:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21032 states, 21031 states have (on average 1.182825353050259) internal successors, (24876), 21031 states have internal predecessors, (24876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21032 states to 21032 states and 24876 transitions. [2022-07-22 12:27:52,944 INFO L78 Accepts]: Start accepts. Automaton has 21032 states and 24876 transitions. Word has length 376 [2022-07-22 12:27:52,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:52,945 INFO L495 AbstractCegarLoop]: Abstraction has 21032 states and 24876 transitions. [2022-07-22 12:27:52,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 21032 states and 24876 transitions. [2022-07-22 12:27:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-07-22 12:27:52,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:52,952 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-22 12:27:52,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:27:52,952 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash -51249649, now seen corresponding path program 1 times [2022-07-22 12:27:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:52,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241342620] [2022-07-22 12:27:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-22 12:27:53,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:53,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241342620] [2022-07-22 12:27:53,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241342620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:53,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:53,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:27:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355678955] [2022-07-22 12:27:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:53,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:27:53,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:27:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:53,107 INFO L87 Difference]: Start difference. First operand 21032 states and 24876 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:55,933 INFO L93 Difference]: Finished difference Result 49572 states and 59456 transitions. [2022-07-22 12:27:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:27:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 377 [2022-07-22 12:27:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:55,987 INFO L225 Difference]: With dead ends: 49572 [2022-07-22 12:27:55,988 INFO L226 Difference]: Without dead ends: 29293 [2022-07-22 12:27:56,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:56,011 INFO L413 NwaCegarLoop]: 1311 mSDtfsCounter, 711 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 2977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:56,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 1319 Invalid, 2977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:27:56,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29293 states. [2022-07-22 12:27:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29293 to 28542. [2022-07-22 12:27:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28542 states, 28541 states have (on average 1.1838407904418204) internal successors, (33788), 28541 states have internal predecessors, (33788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28542 states to 28542 states and 33788 transitions. [2022-07-22 12:27:56,357 INFO L78 Accepts]: Start accepts. Automaton has 28542 states and 33788 transitions. Word has length 377 [2022-07-22 12:27:56,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:56,358 INFO L495 AbstractCegarLoop]: Abstraction has 28542 states and 33788 transitions. [2022-07-22 12:27:56,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:56,358 INFO L276 IsEmpty]: Start isEmpty. Operand 28542 states and 33788 transitions. [2022-07-22 12:27:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-07-22 12:27:56,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:56,365 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-22 12:27:56,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:27:56,366 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash 108402636, now seen corresponding path program 1 times [2022-07-22 12:27:56,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:56,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848536488] [2022-07-22 12:27:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:56,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:27:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:27:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-22 12:27:56,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:27:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848536488] [2022-07-22 12:27:56,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848536488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:27:56,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:27:56,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:27:56,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075101493] [2022-07-22 12:27:56,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:27:56,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:27:56,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:27:56,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:27:56,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:56,530 INFO L87 Difference]: Start difference. First operand 28542 states and 33788 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:59,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:27:59,177 INFO L93 Difference]: Finished difference Result 81114 states and 96711 transitions. [2022-07-22 12:27:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:27:59,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 380 [2022-07-22 12:27:59,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:27:59,256 INFO L225 Difference]: With dead ends: 81114 [2022-07-22 12:27:59,256 INFO L226 Difference]: Without dead ends: 49570 [2022-07-22 12:27:59,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:27:59,286 INFO L413 NwaCegarLoop]: 1258 mSDtfsCounter, 754 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:27:59,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 1266 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:27:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49570 states. [2022-07-22 12:27:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49570 to 48819. [2022-07-22 12:27:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48819 states, 48818 states have (on average 1.1366094473349995) internal successors, (55487), 48818 states have internal predecessors, (55487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:59,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48819 states to 48819 states and 55487 transitions. [2022-07-22 12:27:59,946 INFO L78 Accepts]: Start accepts. Automaton has 48819 states and 55487 transitions. Word has length 380 [2022-07-22 12:27:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:27:59,947 INFO L495 AbstractCegarLoop]: Abstraction has 48819 states and 55487 transitions. [2022-07-22 12:27:59,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:27:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 48819 states and 55487 transitions. [2022-07-22 12:27:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-07-22 12:27:59,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:27:59,959 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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] [2022-07-22 12:27:59,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:27:59,959 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:27:59,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:27:59,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1333574750, now seen corresponding path program 1 times [2022-07-22 12:27:59,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:27:59,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690608526] [2022-07-22 12:27:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:27:59,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:28:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-22 12:28:00,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:28:00,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690608526] [2022-07-22 12:28:00,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690608526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:28:00,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:28:00,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:28:00,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378563248] [2022-07-22 12:28:00,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:28:00,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:28:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:28:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:28:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:28:00,336 INFO L87 Difference]: Start difference. First operand 48819 states and 55487 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:28:03,001 INFO L93 Difference]: Finished difference Result 96885 states and 110216 transitions. [2022-07-22 12:28:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:28:03,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2022-07-22 12:28:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:28:03,056 INFO L225 Difference]: With dead ends: 96885 [2022-07-22 12:28:03,056 INFO L226 Difference]: Without dead ends: 48819 [2022-07-22 12:28:03,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:28:03,085 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 684 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:28:03,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 277 Invalid, 2882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 2425 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:28:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48819 states. [2022-07-22 12:28:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48819 to 48819. [2022-07-22 12:28:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48819 states, 48818 states have (on average 1.131877586136261) internal successors, (55256), 48818 states have internal predecessors, (55256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48819 states to 48819 states and 55256 transitions. [2022-07-22 12:28:03,618 INFO L78 Accepts]: Start accepts. Automaton has 48819 states and 55256 transitions. Word has length 443 [2022-07-22 12:28:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:28:03,619 INFO L495 AbstractCegarLoop]: Abstraction has 48819 states and 55256 transitions. [2022-07-22 12:28:03,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 48819 states and 55256 transitions. [2022-07-22 12:28:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2022-07-22 12:28:03,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:28:03,630 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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] [2022-07-22 12:28:03,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 12:28:03,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:28:03,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:28:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1371657392, now seen corresponding path program 1 times [2022-07-22 12:28:03,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:28:03,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37222612] [2022-07-22 12:28:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:28:03,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:28:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 423 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:28:03,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:28:03,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37222612] [2022-07-22 12:28:03,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37222612] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:28:03,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859595204] [2022-07-22 12:28:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:28:03,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:28:03,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:28:03,922 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) [2022-07-22 12:28:03,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:28:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:28:04,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:28:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-22 12:28:04,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:28:04,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859595204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:28:04,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:28:04,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-22 12:28:04,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121313653] [2022-07-22 12:28:04,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:28:04,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:28:04,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:28:04,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:28:04,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:28:04,890 INFO L87 Difference]: Start difference. First operand 48819 states and 55256 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:28:09,601 INFO L93 Difference]: Finished difference Result 147955 states and 169736 transitions. [2022-07-22 12:28:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:28:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 484 [2022-07-22 12:28:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:28:09,836 INFO L225 Difference]: With dead ends: 147955 [2022-07-22 12:28:09,836 INFO L226 Difference]: Without dead ends: 99889 [2022-07-22 12:28:09,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:28:09,871 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1853 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4613 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 5311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 4613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:28:09,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1853 Valid, 69 Invalid, 5311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 4613 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-22 12:28:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99889 states. [2022-07-22 12:28:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99889 to 99136. [2022-07-22 12:28:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99136 states, 99135 states have (on average 1.143057446915822) internal successors, (113317), 99135 states have internal predecessors, (113317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99136 states to 99136 states and 113317 transitions. [2022-07-22 12:28:10,986 INFO L78 Accepts]: Start accepts. Automaton has 99136 states and 113317 transitions. Word has length 484 [2022-07-22 12:28:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:28:10,987 INFO L495 AbstractCegarLoop]: Abstraction has 99136 states and 113317 transitions. [2022-07-22 12:28:10,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 99136 states and 113317 transitions. [2022-07-22 12:28:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-07-22 12:28:11,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:28:11,007 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-22 12:28:11,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:28:11,232 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,SelfDestructingSolverStorable10 [2022-07-22 12:28:11,232 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:28:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:28:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash 105166052, now seen corresponding path program 1 times [2022-07-22 12:28:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:28:11,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962356944] [2022-07-22 12:28:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:28:11,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:28:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 414 proven. 108 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-07-22 12:28:11,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:28:11,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962356944] [2022-07-22 12:28:11,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962356944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:28:11,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538252291] [2022-07-22 12:28:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:28:11,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:28:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:28:11,816 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) [2022-07-22 12:28:11,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:28:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:12,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:28:12,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:28:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-22 12:28:12,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:28:12,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538252291] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:28:12,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:28:12,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 12:28:12,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579969522] [2022-07-22 12:28:12,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:28:12,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:28:12,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:28:12,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:28:12,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:28:12,198 INFO L87 Difference]: Start difference. First operand 99136 states and 113317 transitions. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:28:15,249 INFO L93 Difference]: Finished difference Result 241077 states and 278927 transitions. [2022-07-22 12:28:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:28:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 530 [2022-07-22 12:28:15,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:28:15,410 INFO L225 Difference]: With dead ends: 241077 [2022-07-22 12:28:15,410 INFO L226 Difference]: Without dead ends: 142694 [2022-07-22 12:28:15,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:28:15,447 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 694 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:28:15,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 495 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:28:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142694 states. [2022-07-22 12:28:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142694 to 137437. [2022-07-22 12:28:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137437 states, 137436 states have (on average 1.1303806862830699) internal successors, (155355), 137436 states have internal predecessors, (155355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137437 states to 137437 states and 155355 transitions. [2022-07-22 12:28:17,292 INFO L78 Accepts]: Start accepts. Automaton has 137437 states and 155355 transitions. Word has length 530 [2022-07-22 12:28:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:28:17,302 INFO L495 AbstractCegarLoop]: Abstraction has 137437 states and 155355 transitions. [2022-07-22 12:28:17,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 137437 states and 155355 transitions. [2022-07-22 12:28:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-07-22 12:28:17,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:28:17,326 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 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] [2022-07-22 12:28:17,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 12:28:17,552 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,SelfDestructingSolverStorable11 [2022-07-22 12:28:17,553 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:28:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:28:17,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1688461461, now seen corresponding path program 1 times [2022-07-22 12:28:17,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:28:17,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021712774] [2022-07-22 12:28:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:28:17,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:28:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 828 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-22 12:28:17,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:28:17,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021712774] [2022-07-22 12:28:17,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021712774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:28:17,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:28:17,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:28:17,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964768216] [2022-07-22 12:28:17,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:28:17,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:28:17,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:28:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:28:17,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:28:17,741 INFO L87 Difference]: Start difference. First operand 137437 states and 155355 transitions. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:28:20,961 INFO L93 Difference]: Finished difference Result 274872 states and 310721 transitions. [2022-07-22 12:28:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:28:20,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 582 [2022-07-22 12:28:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:28:21,144 INFO L225 Difference]: With dead ends: 274872 [2022-07-22 12:28:21,144 INFO L226 Difference]: Without dead ends: 138188 [2022-07-22 12:28:21,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:28:21,217 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 735 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:28:21,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 227 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:28:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138188 states. [2022-07-22 12:28:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138188 to 135935. [2022-07-22 12:28:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135935 states, 135934 states have (on average 1.1257227772301264) internal successors, (153024), 135934 states have internal predecessors, (153024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135935 states to 135935 states and 153024 transitions. [2022-07-22 12:28:23,091 INFO L78 Accepts]: Start accepts. Automaton has 135935 states and 153024 transitions. Word has length 582 [2022-07-22 12:28:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:28:23,092 INFO L495 AbstractCegarLoop]: Abstraction has 135935 states and 153024 transitions. [2022-07-22 12:28:23,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 135935 states and 153024 transitions. [2022-07-22 12:28:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-07-22 12:28:23,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:28:23,129 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-22 12:28:23,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:28:23,130 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:28:23,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:28:23,130 INFO L85 PathProgramCache]: Analyzing trace with hash 341598571, now seen corresponding path program 1 times [2022-07-22 12:28:23,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:28:23,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153337516] [2022-07-22 12:28:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:28:23,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:28:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 844 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-07-22 12:28:23,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:28:23,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153337516] [2022-07-22 12:28:23,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153337516] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:28:23,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:28:23,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:28:23,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482768320] [2022-07-22 12:28:23,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:28:23,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:28:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:28:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:28:23,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:28:23,294 INFO L87 Difference]: Start difference. First operand 135935 states and 153024 transitions. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:28:27,049 INFO L93 Difference]: Finished difference Result 380763 states and 429237 transitions. [2022-07-22 12:28:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:28:27,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 593 [2022-07-22 12:28:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:28:27,371 INFO L225 Difference]: With dead ends: 380763 [2022-07-22 12:28:27,371 INFO L226 Difference]: Without dead ends: 245581 [2022-07-22 12:28:27,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:28:27,420 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 704 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:28:27,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 517 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:28:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245581 states. [2022-07-22 12:28:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245581 to 242577. [2022-07-22 12:28:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242577 states, 242576 states have (on average 1.1043920255919795) internal successors, (267899), 242576 states have internal predecessors, (267899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242577 states to 242577 states and 267899 transitions. [2022-07-22 12:28:30,310 INFO L78 Accepts]: Start accepts. Automaton has 242577 states and 267899 transitions. Word has length 593 [2022-07-22 12:28:30,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:28:30,310 INFO L495 AbstractCegarLoop]: Abstraction has 242577 states and 267899 transitions. [2022-07-22 12:28:30,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 242577 states and 267899 transitions. [2022-07-22 12:28:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2022-07-22 12:28:30,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:28:30,735 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:28:30,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:28:30,735 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:28:30,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:28:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1130398600, now seen corresponding path program 1 times [2022-07-22 12:28:30,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:28:30,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798935157] [2022-07-22 12:28:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:28:30,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:28:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 748 proven. 0 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2022-07-22 12:28:31,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:28:31,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798935157] [2022-07-22 12:28:31,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798935157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:28:31,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:28:31,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:28:31,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093074157] [2022-07-22 12:28:31,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:28:31,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:28:31,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:28:31,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:28:31,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:28:31,134 INFO L87 Difference]: Start difference. First operand 242577 states and 267899 transitions. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:28:35,367 INFO L93 Difference]: Finished difference Result 548236 states and 603361 transitions. [2022-07-22 12:28:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:28:35,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 737 [2022-07-22 12:28:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:28:35,754 INFO L225 Difference]: With dead ends: 548236 [2022-07-22 12:28:35,754 INFO L226 Difference]: Without dead ends: 306412 [2022-07-22 12:28:35,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:28:35,818 INFO L413 NwaCegarLoop]: 1342 mSDtfsCounter, 585 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:28:35,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1350 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:28:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306412 states. [2022-07-22 12:28:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306412 to 298151. [2022-07-22 12:28:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298151 states, 298150 states have (on average 1.088817709206775) internal successors, (324631), 298150 states have internal predecessors, (324631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298151 states to 298151 states and 324631 transitions. [2022-07-22 12:28:39,975 INFO L78 Accepts]: Start accepts. Automaton has 298151 states and 324631 transitions. Word has length 737 [2022-07-22 12:28:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:28:39,976 INFO L495 AbstractCegarLoop]: Abstraction has 298151 states and 324631 transitions. [2022-07-22 12:28:39,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 298151 states and 324631 transitions. [2022-07-22 12:28:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2022-07-22 12:28:40,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:28:40,068 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-22 12:28:40,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 12:28:40,068 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:28:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:28:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash -639411, now seen corresponding path program 1 times [2022-07-22 12:28:40,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:28:40,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767178849] [2022-07-22 12:28:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:28:40,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:28:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 1151 proven. 0 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2022-07-22 12:28:40,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:28:40,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767178849] [2022-07-22 12:28:40,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767178849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:28:40,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:28:40,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:28:40,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443298128] [2022-07-22 12:28:40,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:28:40,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:28:40,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:28:40,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:28:40,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:28:40,321 INFO L87 Difference]: Start difference. First operand 298151 states and 324631 transitions. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:28:45,133 INFO L93 Difference]: Finished difference Result 673653 states and 737723 transitions. [2022-07-22 12:28:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:28:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 754 [2022-07-22 12:28:45,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:28:45,646 INFO L225 Difference]: With dead ends: 673653 [2022-07-22 12:28:45,646 INFO L226 Difference]: Without dead ends: 376255 [2022-07-22 12:28:45,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:28:45,746 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 669 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:28:45,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 474 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:28:46,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376255 states. [2022-07-22 12:28:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376255 to 373251. [2022-07-22 12:28:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373251 states, 373250 states have (on average 1.0941942397856665) internal successors, (408408), 373250 states have internal predecessors, (408408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373251 states to 373251 states and 408408 transitions. [2022-07-22 12:28:50,908 INFO L78 Accepts]: Start accepts. Automaton has 373251 states and 408408 transitions. Word has length 754 [2022-07-22 12:28:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:28:50,909 INFO L495 AbstractCegarLoop]: Abstraction has 373251 states and 408408 transitions. [2022-07-22 12:28:50,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:28:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 373251 states and 408408 transitions. [2022-07-22 12:28:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2022-07-22 12:28:50,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:28:50,950 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-07-22 12:28:50,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 12:28:50,950 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:28:50,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:28:50,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1770685735, now seen corresponding path program 1 times [2022-07-22 12:28:50,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:28:50,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070593729] [2022-07-22 12:28:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:28:50,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:28:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 1052 proven. 322 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-07-22 12:28:51,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:28:51,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070593729] [2022-07-22 12:28:51,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070593729] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:28:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411658494] [2022-07-22 12:28:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:28:51,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:28:51,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:28:51,215 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) [2022-07-22 12:28:51,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:28:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:28:51,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:28:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:28:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 1347 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-07-22 12:28:52,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:28:52,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411658494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:28:52,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:28:52,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 12:28:52,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770373810] [2022-07-22 12:28:52,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:28:52,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:28:52,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:28:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:28:52,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:28:52,186 INFO L87 Difference]: Start difference. First operand 373251 states and 408408 transitions. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)