./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/array-industry-pattern/check_removal_from_set_after_insertion.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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 10:09:47,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 10:09:47,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 10:09:47,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 10:09:47,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 10:09:47,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 10:09:47,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 10:09:47,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 10:09:47,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 10:09:47,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 10:09:47,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 10:09:47,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 10:09:47,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 10:09:47,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 10:09:47,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 10:09:47,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 10:09:47,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 10:09:47,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 10:09:47,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 10:09:47,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 10:09:47,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 10:09:47,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 10:09:47,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 10:09:47,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 10:09:47,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 10:09:47,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 10:09:47,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 10:09:47,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 10:09:47,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 10:09:47,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 10:09:47,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 10:09:47,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 10:09:47,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 10:09:47,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 10:09:47,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 10:09:47,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 10:09:47,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 10:09:47,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 10:09:47,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 10:09:47,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 10:09:47,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 10:09:47,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 10:09:47,905 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 10:09:47,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 10:09:47,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 10:09:47,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 10:09:47,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 10:09:47,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 10:09:47,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 10:09:47,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 10:09:47,908 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 10:09:47,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 10:09:47,909 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 10:09:47,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 10:09:47,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 10:09:47,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 10:09:47,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 10:09:47,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 10:09:47,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 10:09:47,910 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 10:09:47,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 10:09:47,910 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 10:09:47,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 10:09:47,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 10:09:47,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 10:09:47,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 10:09:47,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:09:47,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 10:09:47,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 10:09:47,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 10:09:47,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 10:09:47,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 10:09:47,912 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 10:09:47,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 10:09:47,912 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 10:09:47,913 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 10:09:47,913 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 10:09:47,913 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2023-02-18 10:09:48,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 10:09:48,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 10:09:48,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 10:09:48,139 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 10:09:48,139 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 10:09:48,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-02-18 10:09:49,214 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 10:09:49,360 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 10:09:49,360 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-02-18 10:09:49,364 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d732d2124/ff78c620d0b942fcae41f23f33a922e7/FLAGbe4700ab0 [2023-02-18 10:09:49,374 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d732d2124/ff78c620d0b942fcae41f23f33a922e7 [2023-02-18 10:09:49,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 10:09:49,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 10:09:49,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 10:09:49,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 10:09:49,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 10:09:49,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5781aea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49, skipping insertion in model container [2023-02-18 10:09:49,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 10:09:49,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 10:09:49,482 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-02-18 10:09:49,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:09:49,503 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 10:09:49,510 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-02-18 10:09:49,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:09:49,526 INFO L208 MainTranslator]: Completed translation [2023-02-18 10:09:49,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49 WrapperNode [2023-02-18 10:09:49,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 10:09:49,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 10:09:49,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 10:09:49,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 10:09:49,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,563 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2023-02-18 10:09:49,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 10:09:49,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 10:09:49,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 10:09:49,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 10:09:49,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,592 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 10:09:49,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 10:09:49,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 10:09:49,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 10:09:49,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (1/1) ... [2023-02-18 10:09:49,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:09:49,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:49,631 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) [2023-02-18 10:09:49,632 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 [2023-02-18 10:09:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 10:09:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 10:09:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 10:09:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 10:09:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 10:09:49,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 10:09:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 10:09:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 10:09:49,741 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 10:09:49,755 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 10:09:49,963 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 10:09:49,967 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 10:09:49,971 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-18 10:09:49,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:09:49 BoogieIcfgContainer [2023-02-18 10:09:49,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 10:09:49,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 10:09:49,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 10:09:49,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 10:09:49,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 10:09:49" (1/3) ... [2023-02-18 10:09:49,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c470b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:09:49, skipping insertion in model container [2023-02-18 10:09:49,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:49" (2/3) ... [2023-02-18 10:09:49,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c470b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:09:49, skipping insertion in model container [2023-02-18 10:09:49,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:09:49" (3/3) ... [2023-02-18 10:09:49,981 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2023-02-18 10:09:49,994 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 10:09:49,995 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 10:09:50,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 10:09:50,049 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7db0eb45, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 10:09:50,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 10:09:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 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) [2023-02-18 10:09:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 10:09:50,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:50,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:50,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:50,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:50,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1525882359, now seen corresponding path program 1 times [2023-02-18 10:09:50,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:50,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217307797] [2023-02-18 10:09:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:50,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 10:09:50,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:50,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217307797] [2023-02-18 10:09:50,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217307797] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:09:50,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 10:09:50,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 10:09:50,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286986293] [2023-02-18 10:09:50,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:09:50,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 10:09:50,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 10:09:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 10:09:50,306 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 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) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-02-18 10:09:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:50,376 INFO L93 Difference]: Finished difference Result 77 states and 118 transitions. [2023-02-18 10:09:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 10:09:50,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2023-02-18 10:09:50,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:50,400 INFO L225 Difference]: With dead ends: 77 [2023-02-18 10:09:50,400 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 10:09:50,402 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 [2023-02-18 10:09:50,404 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:50,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 10:09:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2023-02-18 10:09:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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) [2023-02-18 10:09:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2023-02-18 10:09:50,425 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 12 [2023-02-18 10:09:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:50,426 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2023-02-18 10:09:50,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-02-18 10:09:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2023-02-18 10:09:50,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 10:09:50,427 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:50,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:50,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 10:09:50,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1053753351, now seen corresponding path program 1 times [2023-02-18 10:09:50,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:50,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937042175] [2023-02-18 10:09:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:50,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 10:09:50,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:50,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937042175] [2023-02-18 10:09:50,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937042175] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:09:50,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 10:09:50,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 10:09:50,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348895248] [2023-02-18 10:09:50,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:09:50,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 10:09:50,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:50,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 10:09:50,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 10:09:50,532 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-02-18 10:09:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:50,556 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-02-18 10:09:50,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 10:09:50,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2023-02-18 10:09:50,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:50,557 INFO L225 Difference]: With dead ends: 52 [2023-02-18 10:09:50,557 INFO L226 Difference]: Without dead ends: 38 [2023-02-18 10:09:50,558 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 [2023-02-18 10:09:50,559 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:50,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:50,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-18 10:09:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2023-02-18 10:09:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 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) [2023-02-18 10:09:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-18 10:09:50,563 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 14 [2023-02-18 10:09:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:50,563 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-18 10:09:50,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-02-18 10:09:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-18 10:09:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 10:09:50,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:50,564 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] [2023-02-18 10:09:50,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 10:09:50,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:50,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1072948653, now seen corresponding path program 1 times [2023-02-18 10:09:50,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:50,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889933242] [2023-02-18 10:09:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:50,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 10:09:50,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889933242] [2023-02-18 10:09:50,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889933242] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:09:50,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 10:09:50,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 10:09:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628757928] [2023-02-18 10:09:50,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:09:50,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 10:09:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 10:09:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 10:09:50,690 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-02-18 10:09:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:50,724 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2023-02-18 10:09:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 10:09:50,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20 [2023-02-18 10:09:50,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:50,725 INFO L225 Difference]: With dead ends: 90 [2023-02-18 10:09:50,725 INFO L226 Difference]: Without dead ends: 67 [2023-02-18 10:09:50,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:09:50,726 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:50,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 96 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:50,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-18 10:09:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2023-02-18 10:09:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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) [2023-02-18 10:09:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-02-18 10:09:50,735 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 20 [2023-02-18 10:09:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:50,736 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-02-18 10:09:50,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-02-18 10:09:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-02-18 10:09:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 10:09:50,737 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:50,737 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] [2023-02-18 10:09:50,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 10:09:50,738 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:50,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1602550877, now seen corresponding path program 1 times [2023-02-18 10:09:50,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:50,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876445154] [2023-02-18 10:09:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:50,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 10:09:50,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:50,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876445154] [2023-02-18 10:09:50,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876445154] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:09:50,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 10:09:50,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 10:09:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599926631] [2023-02-18 10:09:50,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:09:50,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 10:09:50,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 10:09:50,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 10:09:50,811 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-02-18 10:09:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:50,836 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2023-02-18 10:09:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 10:09:50,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20 [2023-02-18 10:09:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:50,841 INFO L225 Difference]: With dead ends: 82 [2023-02-18 10:09:50,842 INFO L226 Difference]: Without dead ends: 53 [2023-02-18 10:09:50,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:09:50,843 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:50,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-18 10:09:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2023-02-18 10:09:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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) [2023-02-18 10:09:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-18 10:09:50,848 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2023-02-18 10:09:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:50,848 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-18 10:09:50,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-02-18 10:09:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-18 10:09:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 10:09:50,848 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:50,849 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] [2023-02-18 10:09:50,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 10:09:50,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash -969039925, now seen corresponding path program 1 times [2023-02-18 10:09:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:50,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340858913] [2023-02-18 10:09:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:50,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 10:09:50,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:50,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340858913] [2023-02-18 10:09:50,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340858913] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:09:50,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 10:09:50,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 10:09:50,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756422971] [2023-02-18 10:09:50,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:09:50,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:09:50,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:50,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:09:50,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 10:09:50,875 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2023-02-18 10:09:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:50,888 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-18 10:09:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:09:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2023-02-18 10:09:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:50,889 INFO L225 Difference]: With dead ends: 46 [2023-02-18 10:09:50,889 INFO L226 Difference]: Without dead ends: 35 [2023-02-18 10:09:50,889 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 [2023-02-18 10:09:50,890 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:50,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-18 10:09:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-18 10:09:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 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) [2023-02-18 10:09:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-02-18 10:09:50,894 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2023-02-18 10:09:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:50,894 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-02-18 10:09:50,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2023-02-18 10:09:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-02-18 10:09:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 10:09:50,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:50,895 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] [2023-02-18 10:09:50,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 10:09:50,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1842211539, now seen corresponding path program 1 times [2023-02-18 10:09:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:50,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316001261] [2023-02-18 10:09:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:50,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 10:09:50,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:50,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316001261] [2023-02-18 10:09:50,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316001261] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:50,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041266999] [2023-02-18 10:09:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:50,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:50,986 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) [2023-02-18 10:09:51,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 10:09:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 10:09:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 10:09:51,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:09:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 10:09:51,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041266999] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:09:51,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:09:51,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-02-18 10:09:51,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826461624] [2023-02-18 10:09:51,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:09:51,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 10:09:51,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 10:09:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-18 10:09:51,159 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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) [2023-02-18 10:09:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:51,318 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2023-02-18 10:09:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 10:09:51,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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 25 [2023-02-18 10:09:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:51,320 INFO L225 Difference]: With dead ends: 141 [2023-02-18 10:09:51,320 INFO L226 Difference]: Without dead ends: 111 [2023-02-18 10:09:51,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2023-02-18 10:09:51,321 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 132 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:51,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 92 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:09:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-18 10:09:51,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 51. [2023-02-18 10:09:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 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) [2023-02-18 10:09:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-02-18 10:09:51,332 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2023-02-18 10:09:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:51,333 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-02-18 10:09:51,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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) [2023-02-18 10:09:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-02-18 10:09:51,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 10:09:51,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:51,333 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:51,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:51,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-18 10:09:51,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:51,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:51,535 INFO L85 PathProgramCache]: Analyzing trace with hash 492833075, now seen corresponding path program 2 times [2023-02-18 10:09:51,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:51,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884569898] [2023-02-18 10:09:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:51,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-18 10:09:51,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:51,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884569898] [2023-02-18 10:09:51,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884569898] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:09:51,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 10:09:51,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 10:09:51,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624307738] [2023-02-18 10:09:51,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:09:51,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:09:51,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:09:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 10:09:51,566 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-02-18 10:09:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:51,575 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2023-02-18 10:09:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:09:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 34 [2023-02-18 10:09:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:51,576 INFO L225 Difference]: With dead ends: 66 [2023-02-18 10:09:51,576 INFO L226 Difference]: Without dead ends: 51 [2023-02-18 10:09:51,576 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 [2023-02-18 10:09:51,577 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:51,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-18 10:09:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-18 10:09:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 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) [2023-02-18 10:09:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2023-02-18 10:09:51,582 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 34 [2023-02-18 10:09:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:51,582 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2023-02-18 10:09:51,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-02-18 10:09:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2023-02-18 10:09:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 10:09:51,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:51,583 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:51,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 10:09:51,583 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:51,583 INFO L85 PathProgramCache]: Analyzing trace with hash 750998513, now seen corresponding path program 1 times [2023-02-18 10:09:51,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:51,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628876385] [2023-02-18 10:09:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:51,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 10:09:51,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:51,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628876385] [2023-02-18 10:09:51,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628876385] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:51,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42754107] [2023-02-18 10:09:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:51,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:51,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:51,685 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) [2023-02-18 10:09:51,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 10:09:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 10:09:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 10:09:51,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:09:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 10:09:51,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42754107] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:09:51,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:09:51,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-02-18 10:09:51,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777816607] [2023-02-18 10:09:51,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:09:51,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 10:09:51,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:51,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 10:09:51,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2023-02-18 10:09:51,844 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 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) [2023-02-18 10:09:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:52,044 INFO L93 Difference]: Finished difference Result 204 states and 234 transitions. [2023-02-18 10:09:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 10:09:52,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 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 34 [2023-02-18 10:09:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:52,046 INFO L225 Difference]: With dead ends: 204 [2023-02-18 10:09:52,046 INFO L226 Difference]: Without dead ends: 164 [2023-02-18 10:09:52,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2023-02-18 10:09:52,049 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 257 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:52,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 150 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:09:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-02-18 10:09:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 63. [2023-02-18 10:09:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 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) [2023-02-18 10:09:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2023-02-18 10:09:52,059 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 34 [2023-02-18 10:09:52,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:52,059 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2023-02-18 10:09:52,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 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) [2023-02-18 10:09:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2023-02-18 10:09:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 10:09:52,060 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:52,060 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:52,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:52,264 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,SelfDestructingSolverStorable7 [2023-02-18 10:09:52,264 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:52,265 INFO L85 PathProgramCache]: Analyzing trace with hash -452665475, now seen corresponding path program 2 times [2023-02-18 10:09:52,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:52,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733542072] [2023-02-18 10:09:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:52,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 10:09:52,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:52,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733542072] [2023-02-18 10:09:52,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733542072] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:52,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745444622] [2023-02-18 10:09:52,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:09:52,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:52,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:52,430 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) [2023-02-18 10:09:52,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 10:09:52,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:09:52,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:09:52,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 10:09:52,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 10:09:52,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:09:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 10:09:52,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745444622] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:09:52,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:09:52,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-02-18 10:09:52,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652686109] [2023-02-18 10:09:52,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:09:52,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 10:09:52,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:52,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 10:09:52,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 10:09:52,785 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 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) [2023-02-18 10:09:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:53,184 INFO L93 Difference]: Finished difference Result 372 states and 420 transitions. [2023-02-18 10:09:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 10:09:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 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 46 [2023-02-18 10:09:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:53,185 INFO L225 Difference]: With dead ends: 372 [2023-02-18 10:09:53,185 INFO L226 Difference]: Without dead ends: 332 [2023-02-18 10:09:53,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 10:09:53,187 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1062 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:53,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1062 Valid, 203 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 10:09:53,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-02-18 10:09:53,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 87. [2023-02-18 10:09:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 86 states have internal predecessors, (95), 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) [2023-02-18 10:09:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2023-02-18 10:09:53,195 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 46 [2023-02-18 10:09:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:53,195 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2023-02-18 10:09:53,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 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) [2023-02-18 10:09:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2023-02-18 10:09:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-18 10:09:53,196 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:53,196 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:53,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:53,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:53,401 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:53,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1586487147, now seen corresponding path program 3 times [2023-02-18 10:09:53,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:53,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064097989] [2023-02-18 10:09:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:53,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 10:09:53,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:53,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064097989] [2023-02-18 10:09:53,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064097989] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:53,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637333201] [2023-02-18 10:09:53,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:09:53,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:53,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:53,980 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:09:53,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 10:09:54,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 10:09:54,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:09:54,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 10:09:54,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2023-02-18 10:09:54,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:09:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2023-02-18 10:09:54,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637333201] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:09:54,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:09:54,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 30 [2023-02-18 10:09:54,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611521100] [2023-02-18 10:09:54,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:09:54,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 10:09:54,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:54,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 10:09:54,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2023-02-18 10:09:54,129 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 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) [2023-02-18 10:09:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:54,733 INFO L93 Difference]: Finished difference Result 427 states and 474 transitions. [2023-02-18 10:09:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 10:09:54,733 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 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 70 [2023-02-18 10:09:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:54,735 INFO L225 Difference]: With dead ends: 427 [2023-02-18 10:09:54,735 INFO L226 Difference]: Without dead ends: 387 [2023-02-18 10:09:54,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=935, Invalid=2035, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 10:09:54,736 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 953 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:54,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 228 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 10:09:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-02-18 10:09:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 117. [2023-02-18 10:09:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 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) [2023-02-18 10:09:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2023-02-18 10:09:54,744 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 70 [2023-02-18 10:09:54,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:54,745 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2023-02-18 10:09:54,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 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) [2023-02-18 10:09:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2023-02-18 10:09:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-18 10:09:54,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:54,746 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:54,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:54,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:54,951 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1867228667, now seen corresponding path program 1 times [2023-02-18 10:09:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:54,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044216563] [2023-02-18 10:09:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:54,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 10:09:55,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:55,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044216563] [2023-02-18 10:09:55,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044216563] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:55,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23804028] [2023-02-18 10:09:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:55,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:55,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:55,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:09:55,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 10:09:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:55,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 10:09:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 10:09:56,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:09:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 10:09:56,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23804028] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:09:56,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:09:56,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2023-02-18 10:09:56,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186326521] [2023-02-18 10:09:56,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:09:56,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-18 10:09:56,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-18 10:09:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=3197, Unknown=0, NotChecked=0, Total=5700 [2023-02-18 10:09:56,607 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 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) [2023-02-18 10:09:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:58,101 INFO L93 Difference]: Finished difference Result 792 states and 891 transitions. [2023-02-18 10:09:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-18 10:09:58,102 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 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 90 [2023-02-18 10:09:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:58,104 INFO L225 Difference]: With dead ends: 792 [2023-02-18 10:09:58,104 INFO L226 Difference]: Without dead ends: 724 [2023-02-18 10:09:58,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3502 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3775, Invalid=6125, Unknown=0, NotChecked=0, Total=9900 [2023-02-18 10:09:58,107 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2426 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2426 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:58,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2426 Valid, 339 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 10:09:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2023-02-18 10:09:58,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 167. [2023-02-18 10:09:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 166 states have internal predecessors, (181), 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) [2023-02-18 10:09:58,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 181 transitions. [2023-02-18 10:09:58,118 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 181 transitions. Word has length 90 [2023-02-18 10:09:58,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:58,119 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 181 transitions. [2023-02-18 10:09:58,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 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) [2023-02-18 10:09:58,119 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 181 transitions. [2023-02-18 10:09:58,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-02-18 10:09:58,120 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:58,120 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:58,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:58,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 10:09:58,326 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:58,326 INFO L85 PathProgramCache]: Analyzing trace with hash 838087341, now seen corresponding path program 2 times [2023-02-18 10:09:58,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:58,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932508277] [2023-02-18 10:09:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:58,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 10:10:00,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:10:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932508277] [2023-02-18 10:10:00,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932508277] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:10:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101687689] [2023-02-18 10:10:00,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:10:00,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:00,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:10:00,041 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:10:00,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 10:10:00,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:10:00,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:10:00,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-18 10:10:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:10:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 10:10:01,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:10:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 10:10:03,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101687689] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:10:03,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:10:03,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 150 [2023-02-18 10:10:03,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153570250] [2023-02-18 10:10:03,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:10:03,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-02-18 10:10:03,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:10:03,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-02-18 10:10:03,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10003, Invalid=12647, Unknown=0, NotChecked=0, Total=22650 [2023-02-18 10:10:03,477 INFO L87 Difference]: Start difference. First operand 167 states and 181 transitions. Second operand has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 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) [2023-02-18 10:10:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:10:11,615 INFO L93 Difference]: Finished difference Result 1492 states and 1666 transitions. [2023-02-18 10:10:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-18 10:10:11,615 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 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 140 [2023-02-18 10:10:11,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:10:11,619 INFO L225 Difference]: With dead ends: 1492 [2023-02-18 10:10:11,619 INFO L226 Difference]: Without dead ends: 1424 [2023-02-18 10:10:11,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14502 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15050, Invalid=24750, Unknown=0, NotChecked=0, Total=39800 [2023-02-18 10:10:11,627 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5289 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5289 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:10:11,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5289 Valid, 685 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 10:10:11,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2023-02-18 10:10:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 267. [2023-02-18 10:10:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.056390977443609) internal successors, (281), 266 states have internal predecessors, (281), 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) [2023-02-18 10:10:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 281 transitions. [2023-02-18 10:10:11,644 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 281 transitions. Word has length 140 [2023-02-18 10:10:11,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:10:11,645 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 281 transitions. [2023-02-18 10:10:11,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 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) [2023-02-18 10:10:11,645 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 281 transitions. [2023-02-18 10:10:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-02-18 10:10:11,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:10:11,647 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:10:11,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 10:10:11,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:11,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:10:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:10:11,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1802074769, now seen corresponding path program 3 times [2023-02-18 10:10:11,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:10:11,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073427390] [2023-02-18 10:10:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:10:11,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:10:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 10:10:17,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:10:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073427390] [2023-02-18 10:10:17,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073427390] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:10:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097790233] [2023-02-18 10:10:17,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:10:17,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:17,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:10:17,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:10:17,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 10:10:17,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 10:10:17,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:10:17,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 10:10:17,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:10:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9641 trivial. 0 not checked. [2023-02-18 10:10:17,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:10:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9641 trivial. 0 not checked. [2023-02-18 10:10:18,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097790233] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:10:18,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:10:18,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 108 [2023-02-18 10:10:18,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919595979] [2023-02-18 10:10:18,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:10:18,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2023-02-18 10:10:18,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:10:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2023-02-18 10:10:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5478, Invalid=6294, Unknown=0, NotChecked=0, Total=11772 [2023-02-18 10:10:18,133 INFO L87 Difference]: Start difference. First operand 267 states and 281 transitions. Second operand has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 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) [2023-02-18 10:10:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:10:45,338 INFO L93 Difference]: Finished difference Result 2964 states and 3197 transitions. [2023-02-18 10:10:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2023-02-18 10:10:45,339 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 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 240 [2023-02-18 10:10:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:10:45,345 INFO L225 Difference]: With dead ends: 2964 [2023-02-18 10:10:45,346 INFO L226 Difference]: Without dead ends: 2896 [2023-02-18 10:10:45,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 470 SyntacticMatches, 2 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46369 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=53146, Invalid=115364, Unknown=0, NotChecked=0, Total=168510 [2023-02-18 10:10:45,375 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 12040 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 2221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12040 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 3535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2221 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-18 10:10:45,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12040 Valid, 1021 Invalid, 3535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2221 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-18 10:10:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2023-02-18 10:10:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 770. [2023-02-18 10:10:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1495448634590377) internal successors, (884), 769 states have internal predecessors, (884), 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) [2023-02-18 10:10:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 884 transitions. [2023-02-18 10:10:45,580 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 884 transitions. Word has length 240 [2023-02-18 10:10:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:10:45,580 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 884 transitions. [2023-02-18 10:10:45,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 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) [2023-02-18 10:10:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 884 transitions. [2023-02-18 10:10:45,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-02-18 10:10:45,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:10:45,582 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:10:45,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 10:10:45,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:45,783 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:10:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:10:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1263380961, now seen corresponding path program 1 times [2023-02-18 10:10:45,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:10:45,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114136817] [2023-02-18 10:10:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:10:45,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:10:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 10:10:51,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:10:51,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114136817] [2023-02-18 10:10:51,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114136817] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:10:51,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609267254] [2023-02-18 10:10:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:10:51,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:51,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:10:51,550 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:10:51,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 10:10:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2004 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-18 10:10:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:10:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 10:10:55,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:11:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 10:11:05,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609267254] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:11:05,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:11:05,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104, 104] total 309 [2023-02-18 10:11:05,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785866447] [2023-02-18 10:11:05,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:11:05,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 310 states [2023-02-18 10:11:05,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:11:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 310 interpolants. [2023-02-18 10:11:05,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42439, Invalid=53351, Unknown=0, NotChecked=0, Total=95790 [2023-02-18 10:11:05,147 INFO L87 Difference]: Start difference. First operand 770 states and 884 transitions. Second operand has 310 states, 310 states have (on average 2.064516129032258) internal successors, (640), 309 states have internal predecessors, (640), 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) [2023-02-18 10:12:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:12:25,494 INFO L93 Difference]: Finished difference Result 3668 states and 4101 transitions. [2023-02-18 10:12:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2023-02-18 10:12:25,494 INFO L78 Accepts]: Start accepts. Automaton has has 310 states, 310 states have (on average 2.064516129032258) internal successors, (640), 309 states have internal predecessors, (640), 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 251 [2023-02-18 10:12:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:12:25,501 INFO L225 Difference]: With dead ends: 3668 [2023-02-18 10:12:25,502 INFO L226 Difference]: Without dead ends: 3103 [2023-02-18 10:12:25,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62626 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=63757, Invalid=105575, Unknown=0, NotChecked=0, Total=169332 [2023-02-18 10:12:25,508 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11197 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 2160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11197 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 4238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2160 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:12:25,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11197 Valid, 1337 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2160 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-18 10:12:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3103 states. [2023-02-18 10:12:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 976. [2023-02-18 10:12:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 1.117948717948718) internal successors, (1090), 975 states have internal predecessors, (1090), 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) [2023-02-18 10:12:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1090 transitions. [2023-02-18 10:12:25,753 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1090 transitions. Word has length 251 [2023-02-18 10:12:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:12:25,753 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1090 transitions. [2023-02-18 10:12:25,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 310 states, 310 states have (on average 2.064516129032258) internal successors, (640), 309 states have internal predecessors, (640), 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) [2023-02-18 10:12:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1090 transitions. [2023-02-18 10:12:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-02-18 10:12:25,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:12:25,758 INFO L195 NwaCegarLoop]: trace histogram [204, 204, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:12:25,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 10:12:25,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 10:12:25,965 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:12:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:12:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash -148650991, now seen corresponding path program 2 times [2023-02-18 10:12:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:12:25,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129284544] [2023-02-18 10:12:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:12:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:12:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:12:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 41666 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 10:12:49,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:12:49,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129284544] [2023-02-18 10:12:49,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129284544] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:12:49,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130087286] [2023-02-18 10:12:49,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:12:49,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:12:49,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:12:49,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:12:49,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 10:12:49,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:12:49,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:12:49,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 3755 conjuncts, 207 conjunts are in the unsatisfiable core [2023-02-18 10:12:49,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:13:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 41666 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 10:13:03,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:13:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 41666 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 10:13:41,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130087286] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:13:41,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:13:41,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [207, 207, 207] total 618 [2023-02-18 10:13:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797010120] [2023-02-18 10:13:41,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:13:41,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 619 states [2023-02-18 10:13:41,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:13:41,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 619 interpolants. [2023-02-18 10:13:41,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169747, Invalid=212795, Unknown=0, NotChecked=0, Total=382542 [2023-02-18 10:13:41,639 INFO L87 Difference]: Start difference. First operand 976 states and 1090 transitions. Second operand has 619 states, 619 states have (on average 2.0323101777059773) internal successors, (1258), 618 states have internal predecessors, (1258), 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)