./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/bitvector/soft_float_1-3a.c.cil.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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:22:40,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:22:40,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:22:40,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:22:40,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:22:40,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:22:40,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:22:40,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:22:40,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:22:40,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:22:40,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:22:40,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:22:40,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:22:40,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:22:40,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:22:40,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:22:40,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:22:40,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:22:40,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:22:40,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:22:40,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:22:40,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:22:40,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:22:40,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:22:40,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:22:40,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:22:40,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:22:40,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:22:40,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:22:40,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:22:40,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:22:40,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:22:40,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:22:40,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:22:40,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:22:40,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:22:40,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:22:40,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:22:40,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:22:40,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:22:40,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:22:40,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:22:40,607 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:22:40,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:22:40,608 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:22:40,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:22:40,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:22:40,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:22:40,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:22:40,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:22:40,609 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:22:40,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:22:40,610 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:22:40,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:22:40,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:22:40,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:22:40,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:22:40,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:22:40,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:22:40,611 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:22:40,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:22:40,611 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:22:40,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:22:40,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:22:40,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:22:40,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:22:40,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:22:40,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:22:40,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:22:40,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:22:40,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:22:40,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:22:40,613 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:22:40,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:22:40,613 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:22:40,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:22:40,613 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:22:40,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2023-02-15 10:22:40,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:22:40,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:22:40,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:22:40,774 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:22:40,774 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:22:40,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-02-15 10:22:41,803 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:22:41,963 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:22:41,964 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-02-15 10:22:41,969 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c8d1caa5/f46dfcfe9d894323912bc3b2618b3b6b/FLAG9372389b7 [2023-02-15 10:22:41,979 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c8d1caa5/f46dfcfe9d894323912bc3b2618b3b6b [2023-02-15 10:22:41,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:22:41,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:22:41,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:22:41,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:22:41,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:22:41,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:22:41" (1/1) ... [2023-02-15 10:22:41,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7323a780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:41, skipping insertion in model container [2023-02-15 10:22:41,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:22:41" (1/1) ... [2023-02-15 10:22:41,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:22:42,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:22:42,118 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/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-02-15 10:22:42,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:22:42,182 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:22:42,191 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/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-02-15 10:22:42,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:22:42,228 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:22:42,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42 WrapperNode [2023-02-15 10:22:42,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:22:42,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:22:42,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:22:42,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:22:42,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,257 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 201 [2023-02-15 10:22:42,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:22:42,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:22:42,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:22:42,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:22:42,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,278 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:22:42,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:22:42,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:22:42,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:22:42,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (1/1) ... [2023-02-15 10:22:42,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:22:42,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:42,323 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) [2023-02-15 10:22:42,325 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 [2023-02-15 10:22:42,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:22:42,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:22:42,356 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-15 10:22:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-15 10:22:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:22:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:22:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 10:22:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 10:22:42,407 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:22:42,408 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:22:42,719 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:22:42,724 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:22:42,724 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 10:22:42,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:22:42 BoogieIcfgContainer [2023-02-15 10:22:42,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:22:42,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:22:42,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:22:42,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:22:42,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:22:41" (1/3) ... [2023-02-15 10:22:42,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5198fd8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:22:42, skipping insertion in model container [2023-02-15 10:22:42,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:42" (2/3) ... [2023-02-15 10:22:42,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5198fd8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:22:42, skipping insertion in model container [2023-02-15 10:22:42,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:22:42" (3/3) ... [2023-02-15 10:22:42,734 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2023-02-15 10:22:42,755 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:22:42,755 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:22:42,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:22:42,793 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;@59b046bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:22:42,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:22:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 84 states have internal predecessors, (132), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 10:22:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 10:22:42,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:42,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:42,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:42,808 INFO L85 PathProgramCache]: Analyzing trace with hash 906811198, now seen corresponding path program 1 times [2023-02-15 10:22:42,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:42,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900270776] [2023-02-15 10:22:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:42,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:43,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:43,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900270776] [2023-02-15 10:22:43,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900270776] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:43,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:43,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:22:43,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355278647] [2023-02-15 10:22:43,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:43,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:22:43,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:43,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:22:43,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:22:43,046 INFO L87 Difference]: Start difference. First operand has 94 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 84 states have internal predecessors, (132), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:43,086 INFO L93 Difference]: Finished difference Result 235 states and 390 transitions. [2023-02-15 10:22:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:22:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2023-02-15 10:22:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:43,095 INFO L225 Difference]: With dead ends: 235 [2023-02-15 10:22:43,095 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 10:22:43,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:22:43,100 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 63 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:43,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 10:22:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2023-02-15 10:22:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 111 states have (on average 1.5405405405405406) internal successors, (171), 113 states have internal predecessors, (171), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 10:22:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 194 transitions. [2023-02-15 10:22:43,132 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 194 transitions. Word has length 37 [2023-02-15 10:22:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:43,134 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 194 transitions. [2023-02-15 10:22:43,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 194 transitions. [2023-02-15 10:22:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 10:22:43,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:43,137 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:43,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 10:22:43,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash 804838827, now seen corresponding path program 1 times [2023-02-15 10:22:43,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:43,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254169106] [2023-02-15 10:22:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:43,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:43,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254169106] [2023-02-15 10:22:43,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254169106] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:43,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:43,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:22:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4603554] [2023-02-15 10:22:43,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:43,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:22:43,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:43,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:22:43,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:22:43,208 INFO L87 Difference]: Start difference. First operand 126 states and 194 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:43,227 INFO L93 Difference]: Finished difference Result 228 states and 353 transitions. [2023-02-15 10:22:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:22:43,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-02-15 10:22:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:43,230 INFO L225 Difference]: With dead ends: 228 [2023-02-15 10:22:43,230 INFO L226 Difference]: Without dead ends: 192 [2023-02-15 10:22:43,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:22:43,232 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 55 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:43,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 272 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-15 10:22:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2023-02-15 10:22:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 162 states have (on average 1.5185185185185186) internal successors, (246), 165 states have internal predecessors, (246), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 10:22:43,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 280 transitions. [2023-02-15 10:22:43,246 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 280 transitions. Word has length 39 [2023-02-15 10:22:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:43,246 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 280 transitions. [2023-02-15 10:22:43,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 280 transitions. [2023-02-15 10:22:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 10:22:43,248 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:43,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:43,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 10:22:43,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:43,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1821406099, now seen corresponding path program 1 times [2023-02-15 10:22:43,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:43,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064605760] [2023-02-15 10:22:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:43,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:43,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:43,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064605760] [2023-02-15 10:22:43,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064605760] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:43,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63804305] [2023-02-15 10:22:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:43,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:43,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:43,472 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) [2023-02-15 10:22:43,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:22:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 10:22:43,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 10:22:43,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:43,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63804305] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:43,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:22:43,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 12 [2023-02-15 10:22:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875849894] [2023-02-15 10:22:43,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:22:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:22:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:22:43,706 INFO L87 Difference]: Start difference. First operand 183 states and 280 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:43,726 INFO L93 Difference]: Finished difference Result 319 states and 484 transitions. [2023-02-15 10:22:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:22:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-15 10:22:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:43,728 INFO L225 Difference]: With dead ends: 319 [2023-02-15 10:22:43,728 INFO L226 Difference]: Without dead ends: 215 [2023-02-15 10:22:43,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:22:43,729 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 64 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:43,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-15 10:22:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 183. [2023-02-15 10:22:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 162 states have (on average 1.4938271604938271) internal successors, (242), 165 states have internal predecessors, (242), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 10:22:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 276 transitions. [2023-02-15 10:22:43,742 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 276 transitions. Word has length 40 [2023-02-15 10:22:43,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:43,742 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 276 transitions. [2023-02-15 10:22:43,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 276 transitions. [2023-02-15 10:22:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 10:22:43,744 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:43,744 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:43,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:43,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:43,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:43,950 INFO L85 PathProgramCache]: Analyzing trace with hash -363711082, now seen corresponding path program 1 times [2023-02-15 10:22:43,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:43,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122644026] [2023-02-15 10:22:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:43,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:44,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:44,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122644026] [2023-02-15 10:22:44,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122644026] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:44,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:44,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:22:44,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601109936] [2023-02-15 10:22:44,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:44,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:22:44,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:22:44,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:22:44,065 INFO L87 Difference]: Start difference. First operand 183 states and 276 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:44,104 INFO L93 Difference]: Finished difference Result 291 states and 442 transitions. [2023-02-15 10:22:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:22:44,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-15 10:22:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:44,107 INFO L225 Difference]: With dead ends: 291 [2023-02-15 10:22:44,107 INFO L226 Difference]: Without dead ends: 262 [2023-02-15 10:22:44,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:22:44,108 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 147 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:44,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 477 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-02-15 10:22:44,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 228. [2023-02-15 10:22:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 202 states have (on average 1.5) internal successors, (303), 206 states have internal predecessors, (303), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-15 10:22:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 347 transitions. [2023-02-15 10:22:44,120 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 347 transitions. Word has length 40 [2023-02-15 10:22:44,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:44,121 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 347 transitions. [2023-02-15 10:22:44,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 347 transitions. [2023-02-15 10:22:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 10:22:44,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:44,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:44,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 10:22:44,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:44,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:44,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1384779436, now seen corresponding path program 1 times [2023-02-15 10:22:44,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:44,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5040414] [2023-02-15 10:22:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:44,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:44,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:44,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5040414] [2023-02-15 10:22:44,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5040414] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:44,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:44,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:22:44,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623729703] [2023-02-15 10:22:44,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:44,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:22:44,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:44,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:22:44,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:22:44,152 INFO L87 Difference]: Start difference. First operand 228 states and 347 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:44,162 INFO L93 Difference]: Finished difference Result 241 states and 363 transitions. [2023-02-15 10:22:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:22:44,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-15 10:22:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:44,165 INFO L225 Difference]: With dead ends: 241 [2023-02-15 10:22:44,165 INFO L226 Difference]: Without dead ends: 234 [2023-02-15 10:22:44,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:22:44,168 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 268 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 [2023-02-15 10:22:44,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 268 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-15 10:22:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2023-02-15 10:22:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 203 states have (on average 1.4975369458128078) internal successors, (304), 207 states have internal predecessors, (304), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-15 10:22:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2023-02-15 10:22:44,188 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 40 [2023-02-15 10:22:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:44,190 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2023-02-15 10:22:44,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:44,190 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2023-02-15 10:22:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 10:22:44,196 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:44,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:44,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 10:22:44,197 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1398619051, now seen corresponding path program 1 times [2023-02-15 10:22:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:44,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533475333] [2023-02-15 10:22:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:44,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:44,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533475333] [2023-02-15 10:22:44,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533475333] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:44,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310867745] [2023-02-15 10:22:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:44,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:44,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:44,327 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) [2023-02-15 10:22:44,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 10:22:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:44,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 10:22:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:44,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:44,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310867745] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:22:44,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:22:44,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-02-15 10:22:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189941710] [2023-02-15 10:22:44,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:22:44,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 10:22:44,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 10:22:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-02-15 10:22:44,594 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 10:22:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:44,794 INFO L93 Difference]: Finished difference Result 762 states and 1158 transitions. [2023-02-15 10:22:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:22:44,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2023-02-15 10:22:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:44,798 INFO L225 Difference]: With dead ends: 762 [2023-02-15 10:22:44,798 INFO L226 Difference]: Without dead ends: 576 [2023-02-15 10:22:44,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-02-15 10:22:44,800 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 576 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:44,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 1513 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-02-15 10:22:44,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 359. [2023-02-15 10:22:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 320 states have (on average 1.465625) internal successors, (469), 325 states have internal predecessors, (469), 35 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (37), 34 states have call predecessors, (37), 33 states have call successors, (37) [2023-02-15 10:22:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 541 transitions. [2023-02-15 10:22:44,813 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 541 transitions. Word has length 41 [2023-02-15 10:22:44,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:44,814 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 541 transitions. [2023-02-15 10:22:44,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 10:22:44,814 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 541 transitions. [2023-02-15 10:22:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 10:22:44,815 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:44,815 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:44,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 10:22:45,020 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,SelfDestructingSolverStorable5 [2023-02-15 10:22:45,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:45,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1616484567, now seen corresponding path program 1 times [2023-02-15 10:22:45,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:45,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781298149] [2023-02-15 10:22:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:45,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:45,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:45,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781298149] [2023-02-15 10:22:45,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781298149] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:45,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:45,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:22:45,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987085091] [2023-02-15 10:22:45,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:45,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:22:45,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:22:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:22:45,151 INFO L87 Difference]: Start difference. First operand 359 states and 541 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:45,280 INFO L93 Difference]: Finished difference Result 779 states and 1170 transitions. [2023-02-15 10:22:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 10:22:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2023-02-15 10:22:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:45,283 INFO L225 Difference]: With dead ends: 779 [2023-02-15 10:22:45,283 INFO L226 Difference]: Without dead ends: 473 [2023-02-15 10:22:45,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:22:45,284 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 75 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:45,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 735 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-02-15 10:22:45,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2023-02-15 10:22:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 424 states have (on average 1.4103773584905661) internal successors, (598), 430 states have internal predecessors, (598), 41 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (43), 42 states have call predecessors, (43), 39 states have call successors, (43) [2023-02-15 10:22:45,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 682 transitions. [2023-02-15 10:22:45,310 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 682 transitions. Word has length 41 [2023-02-15 10:22:45,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:45,310 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 682 transitions. [2023-02-15 10:22:45,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:45,310 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 682 transitions. [2023-02-15 10:22:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 10:22:45,311 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:45,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:45,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 10:22:45,311 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash 337909198, now seen corresponding path program 1 times [2023-02-15 10:22:45,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:45,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456512446] [2023-02-15 10:22:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:45,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:45,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:45,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456512446] [2023-02-15 10:22:45,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456512446] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:45,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:45,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:22:45,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864665723] [2023-02-15 10:22:45,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:45,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:22:45,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:22:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:22:45,348 INFO L87 Difference]: Start difference. First operand 469 states and 682 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:45,370 INFO L93 Difference]: Finished difference Result 476 states and 688 transitions. [2023-02-15 10:22:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 10:22:45,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2023-02-15 10:22:45,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:45,372 INFO L225 Difference]: With dead ends: 476 [2023-02-15 10:22:45,372 INFO L226 Difference]: Without dead ends: 469 [2023-02-15 10:22:45,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:22:45,373 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 5 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:45,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 528 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-02-15 10:22:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2023-02-15 10:22:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 422 states have (on average 1.40521327014218) internal successors, (593), 428 states have internal predecessors, (593), 41 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (43), 42 states have call predecessors, (43), 39 states have call successors, (43) [2023-02-15 10:22:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 677 transitions. [2023-02-15 10:22:45,385 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 677 transitions. Word has length 42 [2023-02-15 10:22:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:45,385 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 677 transitions. [2023-02-15 10:22:45,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 677 transitions. [2023-02-15 10:22:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 10:22:45,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:45,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:45,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 10:22:45,387 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:45,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1951760518, now seen corresponding path program 1 times [2023-02-15 10:22:45,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:45,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75668056] [2023-02-15 10:22:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:45,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:45,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:45,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75668056] [2023-02-15 10:22:45,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75668056] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:45,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:45,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:22:45,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411555638] [2023-02-15 10:22:45,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:45,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:22:45,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:45,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:22:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:22:45,420 INFO L87 Difference]: Start difference. First operand 467 states and 677 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:45,460 INFO L93 Difference]: Finished difference Result 517 states and 742 transitions. [2023-02-15 10:22:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:22:45,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-02-15 10:22:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:45,462 INFO L225 Difference]: With dead ends: 517 [2023-02-15 10:22:45,462 INFO L226 Difference]: Without dead ends: 443 [2023-02-15 10:22:45,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:22:45,463 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 115 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:45,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 435 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-02-15 10:22:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 347. [2023-02-15 10:22:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 316 states have (on average 1.370253164556962) internal successors, (433), 318 states have internal predecessors, (433), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (29), 28 states have call predecessors, (29), 25 states have call successors, (29) [2023-02-15 10:22:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 489 transitions. [2023-02-15 10:22:45,473 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 489 transitions. Word has length 43 [2023-02-15 10:22:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:45,474 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 489 transitions. [2023-02-15 10:22:45,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 489 transitions. [2023-02-15 10:22:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 10:22:45,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:45,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:45,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 10:22:45,475 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:45,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1645353096, now seen corresponding path program 1 times [2023-02-15 10:22:45,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:45,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564969178] [2023-02-15 10:22:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:45,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:45,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:45,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564969178] [2023-02-15 10:22:45,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564969178] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:45,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:45,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:22:45,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762681357] [2023-02-15 10:22:45,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:45,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:22:45,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:45,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:22:45,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:22:45,536 INFO L87 Difference]: Start difference. First operand 347 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:45,702 INFO L93 Difference]: Finished difference Result 876 states and 1271 transitions. [2023-02-15 10:22:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 10:22:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-15 10:22:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:45,705 INFO L225 Difference]: With dead ends: 876 [2023-02-15 10:22:45,706 INFO L226 Difference]: Without dead ends: 728 [2023-02-15 10:22:45,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:22:45,707 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 179 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:45,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1116 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-02-15 10:22:45,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 442. [2023-02-15 10:22:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 410 states have (on average 1.3780487804878048) internal successors, (565), 411 states have internal predecessors, (565), 27 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (33), 30 states have call predecessors, (33), 25 states have call successors, (33) [2023-02-15 10:22:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 625 transitions. [2023-02-15 10:22:45,723 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 625 transitions. Word has length 45 [2023-02-15 10:22:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:45,724 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 625 transitions. [2023-02-15 10:22:45,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 625 transitions. [2023-02-15 10:22:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 10:22:45,725 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:45,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:45,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 10:22:45,725 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:45,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash 836006470, now seen corresponding path program 1 times [2023-02-15 10:22:45,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:45,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356541811] [2023-02-15 10:22:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:45,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:45,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:45,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356541811] [2023-02-15 10:22:45,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356541811] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:45,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434571034] [2023-02-15 10:22:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:45,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:45,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:45,861 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) [2023-02-15 10:22:45,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 10:22:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:45,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 10:22:45,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 10:22:45,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:46,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434571034] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:46,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:22:46,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 12 [2023-02-15 10:22:46,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015652656] [2023-02-15 10:22:46,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:46,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:22:46,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:46,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:22:46,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:22:46,006 INFO L87 Difference]: Start difference. First operand 442 states and 625 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:46,030 INFO L93 Difference]: Finished difference Result 646 states and 902 transitions. [2023-02-15 10:22:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:22:46,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-15 10:22:46,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:46,031 INFO L225 Difference]: With dead ends: 646 [2023-02-15 10:22:46,031 INFO L226 Difference]: Without dead ends: 414 [2023-02-15 10:22:46,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:22:46,032 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 98 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:46,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 318 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:46,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-02-15 10:22:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 352. [2023-02-15 10:22:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 326 states have (on average 1.3466257668711656) internal successors, (439), 328 states have internal predecessors, (439), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (27), 23 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-15 10:22:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 487 transitions. [2023-02-15 10:22:46,045 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 487 transitions. Word has length 45 [2023-02-15 10:22:46,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:46,045 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 487 transitions. [2023-02-15 10:22:46,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 487 transitions. [2023-02-15 10:22:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 10:22:46,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:46,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:46,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:46,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash 980602509, now seen corresponding path program 1 times [2023-02-15 10:22:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:46,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355211589] [2023-02-15 10:22:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:22:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:46,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355211589] [2023-02-15 10:22:46,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355211589] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:46,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:46,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:22:46,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573684701] [2023-02-15 10:22:46,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:46,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:22:46,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:46,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:22:46,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:22:46,285 INFO L87 Difference]: Start difference. First operand 352 states and 487 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:46,312 INFO L93 Difference]: Finished difference Result 580 states and 799 transitions. [2023-02-15 10:22:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 10:22:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-15 10:22:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:46,314 INFO L225 Difference]: With dead ends: 580 [2023-02-15 10:22:46,314 INFO L226 Difference]: Without dead ends: 540 [2023-02-15 10:22:46,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:22:46,315 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 124 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:46,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 456 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-02-15 10:22:46,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 390. [2023-02-15 10:22:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 363 states have (on average 1.3471074380165289) internal successors, (489), 364 states have internal predecessors, (489), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2023-02-15 10:22:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 539 transitions. [2023-02-15 10:22:46,328 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 539 transitions. Word has length 45 [2023-02-15 10:22:46,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:46,329 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 539 transitions. [2023-02-15 10:22:46,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 539 transitions. [2023-02-15 10:22:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 10:22:46,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:46,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:46,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 10:22:46,330 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash 828308281, now seen corresponding path program 1 times [2023-02-15 10:22:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692941230] [2023-02-15 10:22:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:46,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:46,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:46,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692941230] [2023-02-15 10:22:46,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692941230] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:46,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:46,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:22:46,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122434877] [2023-02-15 10:22:46,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:46,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:22:46,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:46,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:22:46,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:22:46,373 INFO L87 Difference]: Start difference. First operand 390 states and 539 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:46,389 INFO L93 Difference]: Finished difference Result 406 states and 556 transitions. [2023-02-15 10:22:46,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:22:46,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2023-02-15 10:22:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:46,391 INFO L225 Difference]: With dead ends: 406 [2023-02-15 10:22:46,391 INFO L226 Difference]: Without dead ends: 390 [2023-02-15 10:22:46,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:22:46,391 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 1 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:46,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 393 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-15 10:22:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2023-02-15 10:22:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 363 states have (on average 1.3415977961432506) internal successors, (487), 364 states have internal predecessors, (487), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2023-02-15 10:22:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 537 transitions. [2023-02-15 10:22:46,404 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 537 transitions. Word has length 46 [2023-02-15 10:22:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:46,404 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 537 transitions. [2023-02-15 10:22:46,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 537 transitions. [2023-02-15 10:22:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 10:22:46,405 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:46,405 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:46,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 10:22:46,406 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:46,406 INFO L85 PathProgramCache]: Analyzing trace with hash 127243703, now seen corresponding path program 1 times [2023-02-15 10:22:46,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:46,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169617269] [2023-02-15 10:22:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:46,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:46,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:46,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169617269] [2023-02-15 10:22:46,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169617269] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:46,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180380736] [2023-02-15 10:22:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:46,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:46,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:46,539 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) [2023-02-15 10:22:46,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 10:22:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:46,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 10:22:46,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:22:46,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:46,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180380736] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:22:46,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:22:46,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-02-15 10:22:46,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996398422] [2023-02-15 10:22:46,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:22:46,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 10:22:46,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:46,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 10:22:46,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-02-15 10:22:46,848 INFO L87 Difference]: Start difference. First operand 390 states and 537 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 10:22:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:47,344 INFO L93 Difference]: Finished difference Result 726 states and 1003 transitions. [2023-02-15 10:22:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 10:22:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2023-02-15 10:22:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:47,347 INFO L225 Difference]: With dead ends: 726 [2023-02-15 10:22:47,347 INFO L226 Difference]: Without dead ends: 339 [2023-02-15 10:22:47,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-02-15 10:22:47,348 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 320 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:47,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 2042 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 10:22:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-02-15 10:22:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 266. [2023-02-15 10:22:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 244 states have (on average 1.3278688524590163) internal successors, (324), 244 states have internal predecessors, (324), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (24), 19 states have call predecessors, (24), 15 states have call successors, (24) [2023-02-15 10:22:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 364 transitions. [2023-02-15 10:22:47,362 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 364 transitions. Word has length 46 [2023-02-15 10:22:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:47,362 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 364 transitions. [2023-02-15 10:22:47,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 10:22:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 364 transitions. [2023-02-15 10:22:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 10:22:47,363 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:47,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:47,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:47,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:47,585 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash 705038931, now seen corresponding path program 1 times [2023-02-15 10:22:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:47,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595328671] [2023-02-15 10:22:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:47,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:47,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:47,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:47,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:47,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595328671] [2023-02-15 10:22:47,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595328671] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144921191] [2023-02-15 10:22:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:47,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:47,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:47,743 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) [2023-02-15 10:22:47,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 10:22:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:47,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 10:22:47,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:47,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:22:47,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144921191] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:47,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:22:47,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-02-15 10:22:47,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941653866] [2023-02-15 10:22:47,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:22:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:22:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 10:22:47,855 INFO L87 Difference]: Start difference. First operand 266 states and 364 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:47,991 INFO L93 Difference]: Finished difference Result 428 states and 595 transitions. [2023-02-15 10:22:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 10:22:47,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-02-15 10:22:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:47,993 INFO L225 Difference]: With dead ends: 428 [2023-02-15 10:22:47,993 INFO L226 Difference]: Without dead ends: 355 [2023-02-15 10:22:47,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-15 10:22:47,994 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 132 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:47,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 716 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-15 10:22:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 296. [2023-02-15 10:22:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 266 states have (on average 1.3421052631578947) internal successors, (357), 269 states have internal predecessors, (357), 24 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (27), 24 states have call predecessors, (27), 22 states have call successors, (27) [2023-02-15 10:22:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 408 transitions. [2023-02-15 10:22:48,004 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 408 transitions. Word has length 48 [2023-02-15 10:22:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:48,004 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 408 transitions. [2023-02-15 10:22:48,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 408 transitions. [2023-02-15 10:22:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 10:22:48,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:48,005 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:48,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:48,210 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,SelfDestructingSolverStorable14 [2023-02-15 10:22:48,210 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1641997822, now seen corresponding path program 1 times [2023-02-15 10:22:48,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:48,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890546096] [2023-02-15 10:22:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:48,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:48,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:48,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:48,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:22:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:22:48,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:48,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890546096] [2023-02-15 10:22:48,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890546096] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:48,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103813682] [2023-02-15 10:22:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:48,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:48,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:48,307 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) [2023-02-15 10:22:48,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 10:22:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:48,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 10:22:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:22:48,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:22:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103813682] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:48,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:22:48,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 15 [2023-02-15 10:22:48,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613606488] [2023-02-15 10:22:48,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:48,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 10:22:48,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 10:22:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:22:48,557 INFO L87 Difference]: Start difference. First operand 296 states and 408 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 10:22:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:48,942 INFO L93 Difference]: Finished difference Result 826 states and 1149 transitions. [2023-02-15 10:22:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 10:22:48,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-02-15 10:22:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:48,944 INFO L225 Difference]: With dead ends: 826 [2023-02-15 10:22:48,944 INFO L226 Difference]: Without dead ends: 582 [2023-02-15 10:22:48,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-02-15 10:22:48,945 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 516 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:48,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1107 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:22:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-02-15 10:22:48,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 532. [2023-02-15 10:22:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 480 states have (on average 1.3020833333333333) internal successors, (625), 484 states have internal predecessors, (625), 46 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (49), 47 states have call predecessors, (49), 43 states have call successors, (49) [2023-02-15 10:22:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 720 transitions. [2023-02-15 10:22:48,964 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 720 transitions. Word has length 49 [2023-02-15 10:22:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:48,964 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 720 transitions. [2023-02-15 10:22:48,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 10:22:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 720 transitions. [2023-02-15 10:22:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 10:22:48,965 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:48,965 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:48,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 10:22:49,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 10:22:49,170 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash 164141512, now seen corresponding path program 1 times [2023-02-15 10:22:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:49,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969999381] [2023-02-15 10:22:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:49,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:49,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:49,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:49,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:22:49,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:49,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969999381] [2023-02-15 10:22:49,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969999381] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:49,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538675446] [2023-02-15 10:22:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:49,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:49,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:49,477 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) [2023-02-15 10:22:49,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 10:22:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:49,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 10:22:49,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:49,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:22:49,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538675446] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:49,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:22:49,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 24 [2023-02-15 10:22:49,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561359360] [2023-02-15 10:22:49,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:49,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 10:22:49,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 10:22:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2023-02-15 10:22:49,719 INFO L87 Difference]: Start difference. First operand 532 states and 720 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:50,062 INFO L93 Difference]: Finished difference Result 963 states and 1327 transitions. [2023-02-15 10:22:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 10:22:50,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-02-15 10:22:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:50,065 INFO L225 Difference]: With dead ends: 963 [2023-02-15 10:22:50,066 INFO L226 Difference]: Without dead ends: 841 [2023-02-15 10:22:50,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2023-02-15 10:22:50,067 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 357 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:50,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1423 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:22:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2023-02-15 10:22:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 712. [2023-02-15 10:22:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 640 states have (on average 1.296875) internal successors, (830), 645 states have internal predecessors, (830), 66 states have call successors, (66), 3 states have call predecessors, (66), 5 states have return successors, (69), 68 states have call predecessors, (69), 63 states have call successors, (69) [2023-02-15 10:22:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 965 transitions. [2023-02-15 10:22:50,091 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 965 transitions. Word has length 50 [2023-02-15 10:22:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:50,091 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 965 transitions. [2023-02-15 10:22:50,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 965 transitions. [2023-02-15 10:22:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 10:22:50,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:50,092 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:50,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 10:22:50,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:50,297 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1732806460, now seen corresponding path program 1 times [2023-02-15 10:22:50,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:50,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572083298] [2023-02-15 10:22:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:50,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:50,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:50,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572083298] [2023-02-15 10:22:50,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572083298] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:50,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:50,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:22:50,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785381386] [2023-02-15 10:22:50,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:50,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:22:50,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:22:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:22:50,325 INFO L87 Difference]: Start difference. First operand 712 states and 965 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:50,349 INFO L93 Difference]: Finished difference Result 721 states and 973 transitions. [2023-02-15 10:22:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:22:50,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-15 10:22:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:50,351 INFO L225 Difference]: With dead ends: 721 [2023-02-15 10:22:50,351 INFO L226 Difference]: Without dead ends: 686 [2023-02-15 10:22:50,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:22:50,352 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:50,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 384 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-02-15 10:22:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 662. [2023-02-15 10:22:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 596 states have (on average 1.2986577181208054) internal successors, (774), 601 states have internal predecessors, (774), 60 states have call successors, (60), 3 states have call predecessors, (60), 5 states have return successors, (62), 61 states have call predecessors, (62), 57 states have call successors, (62) [2023-02-15 10:22:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 896 transitions. [2023-02-15 10:22:50,373 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 896 transitions. Word has length 52 [2023-02-15 10:22:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:50,373 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 896 transitions. [2023-02-15 10:22:50,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 896 transitions. [2023-02-15 10:22:50,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 10:22:50,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:50,374 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:50,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 10:22:50,374 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:50,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:50,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1348659453, now seen corresponding path program 1 times [2023-02-15 10:22:50,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:50,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6037624] [2023-02-15 10:22:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:50,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:50,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:50,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6037624] [2023-02-15 10:22:50,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6037624] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:50,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:50,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 10:22:50,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181233006] [2023-02-15 10:22:50,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:50,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 10:22:50,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 10:22:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:22:50,530 INFO L87 Difference]: Start difference. First operand 662 states and 896 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:50,859 INFO L93 Difference]: Finished difference Result 882 states and 1199 transitions. [2023-02-15 10:22:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:22:50,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2023-02-15 10:22:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:50,862 INFO L225 Difference]: With dead ends: 882 [2023-02-15 10:22:50,863 INFO L226 Difference]: Without dead ends: 864 [2023-02-15 10:22:50,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:22:50,863 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 265 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:50,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 797 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:22:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2023-02-15 10:22:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 698. [2023-02-15 10:22:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 628 states have (on average 1.2961783439490446) internal successors, (814), 634 states have internal predecessors, (814), 64 states have call successors, (64), 3 states have call predecessors, (64), 5 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2023-02-15 10:22:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 944 transitions. [2023-02-15 10:22:50,916 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 944 transitions. Word has length 53 [2023-02-15 10:22:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:50,916 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 944 transitions. [2023-02-15 10:22:50,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 944 transitions. [2023-02-15 10:22:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 10:22:50,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:50,917 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:50,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 10:22:50,918 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:50,918 INFO L85 PathProgramCache]: Analyzing trace with hash -38305071, now seen corresponding path program 1 times [2023-02-15 10:22:50,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:50,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162787429] [2023-02-15 10:22:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:50,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:22:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:50,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:50,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162787429] [2023-02-15 10:22:50,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162787429] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:50,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:50,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:22:50,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016644014] [2023-02-15 10:22:50,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:50,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:22:50,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:50,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:22:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:22:50,975 INFO L87 Difference]: Start difference. First operand 698 states and 944 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:51,030 INFO L93 Difference]: Finished difference Result 753 states and 1013 transitions. [2023-02-15 10:22:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 10:22:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2023-02-15 10:22:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:51,033 INFO L225 Difference]: With dead ends: 753 [2023-02-15 10:22:51,033 INFO L226 Difference]: Without dead ends: 751 [2023-02-15 10:22:51,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:22:51,034 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 41 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:51,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 669 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-02-15 10:22:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 710. [2023-02-15 10:22:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 635 states have (on average 1.2929133858267716) internal successors, (821), 645 states have internal predecessors, (821), 68 states have call successors, (68), 4 states have call predecessors, (68), 6 states have return successors, (70), 65 states have call predecessors, (70), 65 states have call successors, (70) [2023-02-15 10:22:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 959 transitions. [2023-02-15 10:22:51,075 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 959 transitions. Word has length 54 [2023-02-15 10:22:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:51,076 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 959 transitions. [2023-02-15 10:22:51,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:51,076 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 959 transitions. [2023-02-15 10:22:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 10:22:51,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:51,077 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:51,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 10:22:51,077 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:51,077 INFO L85 PathProgramCache]: Analyzing trace with hash 18953231, now seen corresponding path program 1 times [2023-02-15 10:22:51,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:51,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788771490] [2023-02-15 10:22:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:51,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:51,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:51,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:51,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:22:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:51,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:51,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788771490] [2023-02-15 10:22:51,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788771490] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:51,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:51,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:22:51,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428276933] [2023-02-15 10:22:51,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:51,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:22:51,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:51,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:22:51,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:22:51,148 INFO L87 Difference]: Start difference. First operand 710 states and 959 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:51,205 INFO L93 Difference]: Finished difference Result 775 states and 1043 transitions. [2023-02-15 10:22:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 10:22:51,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2023-02-15 10:22:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:51,208 INFO L225 Difference]: With dead ends: 775 [2023-02-15 10:22:51,208 INFO L226 Difference]: Without dead ends: 773 [2023-02-15 10:22:51,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:22:51,208 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 39 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:51,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 697 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-02-15 10:22:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 718. [2023-02-15 10:22:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 638 states have (on average 1.29153605015674) internal successors, (824), 652 states have internal predecessors, (824), 72 states have call successors, (72), 5 states have call predecessors, (72), 7 states have return successors, (74), 65 states have call predecessors, (74), 69 states have call successors, (74) [2023-02-15 10:22:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 970 transitions. [2023-02-15 10:22:51,253 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 970 transitions. Word has length 54 [2023-02-15 10:22:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:51,253 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 970 transitions. [2023-02-15 10:22:51,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 970 transitions. [2023-02-15 10:22:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 10:22:51,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:51,254 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:51,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 10:22:51,255 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash -931744545, now seen corresponding path program 1 times [2023-02-15 10:22:51,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:51,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646589994] [2023-02-15 10:22:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:51,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:51,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:51,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:51,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:22:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:22:51,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:51,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646589994] [2023-02-15 10:22:51,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646589994] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:51,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:51,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-15 10:22:51,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759136325] [2023-02-15 10:22:51,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:51,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 10:22:51,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:51,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 10:22:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:22:51,526 INFO L87 Difference]: Start difference. First operand 718 states and 970 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 10:22:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:52,062 INFO L93 Difference]: Finished difference Result 755 states and 1013 transitions. [2023-02-15 10:22:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 10:22:52,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2023-02-15 10:22:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:52,065 INFO L225 Difference]: With dead ends: 755 [2023-02-15 10:22:52,065 INFO L226 Difference]: Without dead ends: 753 [2023-02-15 10:22:52,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-15 10:22:52,066 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 261 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:52,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 2120 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 10:22:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-02-15 10:22:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 727. [2023-02-15 10:22:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 645 states have (on average 1.289922480620155) internal successors, (832), 660 states have internal predecessors, (832), 73 states have call successors, (73), 6 states have call predecessors, (73), 8 states have return successors, (75), 65 states have call predecessors, (75), 70 states have call successors, (75) [2023-02-15 10:22:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 980 transitions. [2023-02-15 10:22:52,107 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 980 transitions. Word has length 54 [2023-02-15 10:22:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:52,107 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 980 transitions. [2023-02-15 10:22:52,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 10:22:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 980 transitions. [2023-02-15 10:22:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 10:22:52,109 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:52,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:52,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 10:22:52,109 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:52,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1315627843, now seen corresponding path program 1 times [2023-02-15 10:22:52,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:52,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771532376] [2023-02-15 10:22:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:52,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:22:52,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:52,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771532376] [2023-02-15 10:22:52,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771532376] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:52,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495125125] [2023-02-15 10:22:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:52,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:52,458 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) [2023-02-15 10:22:52,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 10:22:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 10:22:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:52,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:22:52,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495125125] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:52,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:22:52,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 23 [2023-02-15 10:22:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725226483] [2023-02-15 10:22:52,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:52,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:22:52,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:22:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2023-02-15 10:22:52,575 INFO L87 Difference]: Start difference. First operand 727 states and 980 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:52,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:52,779 INFO L93 Difference]: Finished difference Result 922 states and 1252 transitions. [2023-02-15 10:22:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 10:22:52,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-02-15 10:22:52,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:52,782 INFO L225 Difference]: With dead ends: 922 [2023-02-15 10:22:52,782 INFO L226 Difference]: Without dead ends: 859 [2023-02-15 10:22:52,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2023-02-15 10:22:52,783 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 213 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:52,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 830 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2023-02-15 10:22:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 644. [2023-02-15 10:22:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 572 states have (on average 1.2902097902097902) internal successors, (738), 586 states have internal predecessors, (738), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2023-02-15 10:22:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 866 transitions. [2023-02-15 10:22:52,820 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 866 transitions. Word has length 55 [2023-02-15 10:22:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:52,820 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 866 transitions. [2023-02-15 10:22:52,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 866 transitions. [2023-02-15 10:22:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 10:22:52,821 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:52,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:52,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:53,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-15 10:22:53,027 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:53,027 INFO L85 PathProgramCache]: Analyzing trace with hash 997951512, now seen corresponding path program 1 times [2023-02-15 10:22:53,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:53,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838180432] [2023-02-15 10:22:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:22:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:22:53,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838180432] [2023-02-15 10:22:53,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838180432] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698660292] [2023-02-15 10:22:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:53,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:53,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:53,348 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) [2023-02-15 10:22:53,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 10:22:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 10:22:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 10:22:53,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:22:53,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698660292] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:53,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:22:53,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 20 [2023-02-15 10:22:53,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945764741] [2023-02-15 10:22:53,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:53,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:22:53,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:53,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:22:53,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-02-15 10:22:53,489 INFO L87 Difference]: Start difference. First operand 644 states and 866 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:53,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:53,643 INFO L93 Difference]: Finished difference Result 785 states and 1038 transitions. [2023-02-15 10:22:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:22:53,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-02-15 10:22:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:53,646 INFO L225 Difference]: With dead ends: 785 [2023-02-15 10:22:53,646 INFO L226 Difference]: Without dead ends: 751 [2023-02-15 10:22:53,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2023-02-15 10:22:53,647 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 314 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:53,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 412 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-02-15 10:22:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 644. [2023-02-15 10:22:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 572 states have (on average 1.2867132867132867) internal successors, (736), 586 states have internal predecessors, (736), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2023-02-15 10:22:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 864 transitions. [2023-02-15 10:22:53,688 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 864 transitions. Word has length 55 [2023-02-15 10:22:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:53,688 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 864 transitions. [2023-02-15 10:22:53,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 864 transitions. [2023-02-15 10:22:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 10:22:53,689 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:53,690 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:53,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:53,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-15 10:22:53,895 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:53,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1506046358, now seen corresponding path program 1 times [2023-02-15 10:22:53,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:53,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660248181] [2023-02-15 10:22:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:53,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:22:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:22:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:54,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660248181] [2023-02-15 10:22:54,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660248181] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:54,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65814283] [2023-02-15 10:22:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:54,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:54,019 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:54,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 10:22:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 10:22:54,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:54,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:22:54,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65814283] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:54,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:22:54,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-15 10:22:54,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838991886] [2023-02-15 10:22:54,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:54,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:22:54,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:22:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:22:54,105 INFO L87 Difference]: Start difference. First operand 644 states and 864 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:54,155 INFO L93 Difference]: Finished difference Result 958 states and 1299 transitions. [2023-02-15 10:22:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:22:54,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2023-02-15 10:22:54,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:54,157 INFO L225 Difference]: With dead ends: 958 [2023-02-15 10:22:54,157 INFO L226 Difference]: Without dead ends: 684 [2023-02-15 10:22:54,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:22:54,158 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:54,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 371 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2023-02-15 10:22:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 664. [2023-02-15 10:22:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 592 states have (on average 1.277027027027027) internal successors, (756), 606 states have internal predecessors, (756), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2023-02-15 10:22:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 884 transitions. [2023-02-15 10:22:54,193 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 884 transitions. Word has length 57 [2023-02-15 10:22:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:54,193 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 884 transitions. [2023-02-15 10:22:54,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 884 transitions. [2023-02-15 10:22:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 10:22:54,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:54,194 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:54,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:54,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-15 10:22:54,399 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:54,399 INFO L85 PathProgramCache]: Analyzing trace with hash 696699732, now seen corresponding path program 1 times [2023-02-15 10:22:54,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:54,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703813014] [2023-02-15 10:22:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:54,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:22:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:22:54,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:54,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703813014] [2023-02-15 10:22:54,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703813014] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:54,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799598255] [2023-02-15 10:22:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:54,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:54,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:54,876 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:54,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 10:22:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 10:22:54,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:22:55,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:22:57,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799598255] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:22:57,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:22:57,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 45 [2023-02-15 10:22:57,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376804529] [2023-02-15 10:22:57,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:22:57,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 10:22:57,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 10:22:57,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1843, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 10:22:57,182 INFO L87 Difference]: Start difference. First operand 664 states and 884 transitions. Second operand has 45 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 37 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 10:23:00,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:00,313 INFO L93 Difference]: Finished difference Result 1216 states and 1636 transitions. [2023-02-15 10:23:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 10:23:00,313 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 37 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2023-02-15 10:23:00,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:00,316 INFO L225 Difference]: With dead ends: 1216 [2023-02-15 10:23:00,316 INFO L226 Difference]: Without dead ends: 1052 [2023-02-15 10:23:00,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=392, Invalid=4164, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 10:23:00,318 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 955 mSDsluCounter, 4802 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 4994 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:00,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 4994 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-15 10:23:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-02-15 10:23:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 776. [2023-02-15 10:23:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 692 states have (on average 1.2760115606936415) internal successors, (883), 706 states have internal predecessors, (883), 74 states have call successors, (74), 7 states have call predecessors, (74), 9 states have return successors, (79), 66 states have call predecessors, (79), 71 states have call successors, (79) [2023-02-15 10:23:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1036 transitions. [2023-02-15 10:23:00,370 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1036 transitions. Word has length 57 [2023-02-15 10:23:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:00,371 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1036 transitions. [2023-02-15 10:23:00,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 37 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 10:23:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1036 transitions. [2023-02-15 10:23:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 10:23:00,372 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:00,373 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:00,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:00,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-15 10:23:00,578 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:00,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:00,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1129526808, now seen corresponding path program 1 times [2023-02-15 10:23:00,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:00,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971971220] [2023-02-15 10:23:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:00,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:23:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:23:00,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:00,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971971220] [2023-02-15 10:23:00,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971971220] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:00,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25046108] [2023-02-15 10:23:00,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:00,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:00,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:00,990 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:01,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 10:23:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:01,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 10:23:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates...