./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/loops/eureka_01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 11:20:36,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 11:20:36,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 11:20:36,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 11:20:36,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 11:20:36,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 11:20:36,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 11:20:36,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 11:20:36,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 11:20:36,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 11:20:36,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 11:20:36,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 11:20:36,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 11:20:36,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 11:20:36,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 11:20:36,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 11:20:36,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 11:20:36,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 11:20:36,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 11:20:36,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 11:20:36,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 11:20:36,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 11:20:36,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 11:20:36,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 11:20:36,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 11:20:36,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 11:20:36,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 11:20:36,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 11:20:36,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 11:20:36,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 11:20:36,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 11:20:36,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 11:20:36,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 11:20:36,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 11:20:36,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 11:20:36,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 11:20:36,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 11:20:36,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 11:20:36,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 11:20:36,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 11:20:36,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 11:20:36,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 11:20:36,737 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 11:20:36,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 11:20:36,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 11:20:36,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 11:20:36,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 11:20:36,739 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 11:20:36,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 11:20:36,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 11:20:36,739 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 11:20:36,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 11:20:36,740 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 11:20:36,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 11:20:36,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 11:20:36,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 11:20:36,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 11:20:36,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 11:20:36,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 11:20:36,741 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 11:20:36,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 11:20:36,742 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 11:20:36,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 11:20:36,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 11:20:36,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 11:20:36,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 11:20:36,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:20:36,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 11:20:36,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 11:20:36,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 11:20:36,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 11:20:36,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 11:20:36,744 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 11:20:36,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 11:20:36,744 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 11:20:36,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 11:20:36,744 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 11:20:36,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 [2023-02-14 11:20:36,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 11:20:36,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 11:20:36,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 11:20:36,964 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 11:20:36,964 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 11:20:36,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_01-2.c [2023-02-14 11:20:37,999 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 11:20:38,151 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 11:20:38,152 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-2.c [2023-02-14 11:20:38,156 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723d65c3e/8ec3cfaf898c40d98c4ab24f642925d4/FLAGc3729a6dc [2023-02-14 11:20:38,170 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723d65c3e/8ec3cfaf898c40d98c4ab24f642925d4 [2023-02-14 11:20:38,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 11:20:38,172 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 11:20:38,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 11:20:38,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 11:20:38,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 11:20:38,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66c6434f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38, skipping insertion in model container [2023-02-14 11:20:38,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 11:20:38,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 11:20:38,274 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/loops/eureka_01-2.c[323,336] [2023-02-14 11:20:38,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:20:38,322 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 11:20:38,336 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/loops/eureka_01-2.c[323,336] [2023-02-14 11:20:38,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:20:38,361 INFO L208 MainTranslator]: Completed translation [2023-02-14 11:20:38,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38 WrapperNode [2023-02-14 11:20:38,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 11:20:38,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 11:20:38,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 11:20:38,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 11:20:38,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,390 INFO L138 Inliner]: procedures = 13, calls = 100, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 199 [2023-02-14 11:20:38,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 11:20:38,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 11:20:38,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 11:20:38,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 11:20:38,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,412 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 11:20:38,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 11:20:38,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 11:20:38,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 11:20:38,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (1/1) ... [2023-02-14 11:20:38,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:20:38,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:20:38,438 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) [2023-02-14 11:20:38,447 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 [2023-02-14 11:20:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 11:20:38,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 11:20:38,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 11:20:38,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 11:20:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 11:20:38,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 11:20:38,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 11:20:38,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 11:20:38,572 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 11:20:38,573 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 11:20:38,794 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 11:20:38,798 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 11:20:38,798 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-14 11:20:38,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:20:38 BoogieIcfgContainer [2023-02-14 11:20:38,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 11:20:38,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 11:20:38,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 11:20:38,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 11:20:38,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:20:38" (1/3) ... [2023-02-14 11:20:38,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5addc105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:20:38, skipping insertion in model container [2023-02-14 11:20:38,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:20:38" (2/3) ... [2023-02-14 11:20:38,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5addc105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:20:38, skipping insertion in model container [2023-02-14 11:20:38,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:20:38" (3/3) ... [2023-02-14 11:20:38,806 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2023-02-14 11:20:38,817 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 11:20:38,817 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 11:20:38,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 11:20:38,853 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;@7dc6d41f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 11:20:38,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 11:20:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 11:20:38,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:38,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:38,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash 678614248, now seen corresponding path program 1 times [2023-02-14 11:20:38,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:38,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323483364] [2023-02-14 11:20:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:38,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:20:39,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:39,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323483364] [2023-02-14 11:20:39,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323483364] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:20:39,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:20:39,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 11:20:39,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309366519] [2023-02-14 11:20:39,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:20:39,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 11:20:39,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 11:20:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 11:20:39,116 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:39,127 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2023-02-14 11:20:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 11:20:39,129 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-14 11:20:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:39,135 INFO L225 Difference]: With dead ends: 47 [2023-02-14 11:20:39,135 INFO L226 Difference]: Without dead ends: 22 [2023-02-14 11:20:39,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 11:20:39,142 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:39,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:20:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-14 11:20:39,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-14 11:20:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-02-14 11:20:39,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2023-02-14 11:20:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:39,167 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-02-14 11:20:39,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-02-14 11:20:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 11:20:39,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:39,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 11:20:39,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash 137869947, now seen corresponding path program 1 times [2023-02-14 11:20:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:39,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805164718] [2023-02-14 11:20:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:39,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:20:39,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:39,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805164718] [2023-02-14 11:20:39,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805164718] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:20:39,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:20:39,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 11:20:39,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021175261] [2023-02-14 11:20:39,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:20:39,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 11:20:39,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 11:20:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:20:39,311 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:39,335 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-02-14 11:20:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 11:20:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-14 11:20:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:39,336 INFO L225 Difference]: With dead ends: 42 [2023-02-14 11:20:39,336 INFO L226 Difference]: Without dead ends: 25 [2023-02-14 11:20:39,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:20:39,337 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:39,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:20:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-14 11:20:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-02-14 11:20:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-02-14 11:20:39,341 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 11 [2023-02-14 11:20:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:39,341 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-02-14 11:20:39,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-02-14 11:20:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 11:20:39,342 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:39,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:39,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 11:20:39,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1682093747, now seen corresponding path program 1 times [2023-02-14 11:20:39,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:39,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369554083] [2023-02-14 11:20:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:20:39,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:39,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369554083] [2023-02-14 11:20:39,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369554083] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:20:39,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:20:39,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 11:20:39,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607874289] [2023-02-14 11:20:39,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:20:39,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:20:39,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:39,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:20:39,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:20:39,440 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:39,495 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2023-02-14 11:20:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 11:20:39,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-14 11:20:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:39,496 INFO L225 Difference]: With dead ends: 51 [2023-02-14 11:20:39,498 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 11:20:39,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:20:39,499 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:39,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 26 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:20:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 11:20:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2023-02-14 11:20:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-02-14 11:20:39,506 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 14 [2023-02-14 11:20:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:39,506 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-02-14 11:20:39,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-02-14 11:20:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 11:20:39,507 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:39,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:39,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 11:20:39,507 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash 701151449, now seen corresponding path program 1 times [2023-02-14 11:20:39,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:39,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546635207] [2023-02-14 11:20:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:39,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 11:20:39,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:39,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546635207] [2023-02-14 11:20:39,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546635207] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:20:39,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:20:39,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 11:20:39,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707899789] [2023-02-14 11:20:39,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:20:39,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:20:39,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:20:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:20:39,602 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:39,628 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-02-14 11:20:39,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 11:20:39,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-14 11:20:39,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:39,631 INFO L225 Difference]: With dead ends: 43 [2023-02-14 11:20:39,632 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 11:20:39,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:20:39,633 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:39,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:20:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 11:20:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-14 11:20:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-14 11:20:39,645 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2023-02-14 11:20:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:39,646 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-14 11:20:39,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-14 11:20:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 11:20:39,647 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:39,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:39,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 11:20:39,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash -792194438, now seen corresponding path program 1 times [2023-02-14 11:20:39,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:39,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376137442] [2023-02-14 11:20:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:39,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:20:39,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:39,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376137442] [2023-02-14 11:20:39,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376137442] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:20:39,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:20:39,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 11:20:39,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121275530] [2023-02-14 11:20:39,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:20:39,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:20:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:20:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:20:39,721 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:39,766 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-02-14 11:20:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 11:20:39,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-14 11:20:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:39,769 INFO L225 Difference]: With dead ends: 48 [2023-02-14 11:20:39,769 INFO L226 Difference]: Without dead ends: 41 [2023-02-14 11:20:39,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:20:39,773 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:39,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:20:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-14 11:20:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2023-02-14 11:20:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-02-14 11:20:39,783 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2023-02-14 11:20:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:39,784 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-02-14 11:20:39,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-02-14 11:20:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 11:20:39,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:39,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:39,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 11:20:39,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:39,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1624635408, now seen corresponding path program 1 times [2023-02-14 11:20:39,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:39,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319789667] [2023-02-14 11:20:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:39,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:20:39,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:39,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319789667] [2023-02-14 11:20:39,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319789667] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:20:39,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671981584] [2023-02-14 11:20:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:39,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:39,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:20:39,907 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) [2023-02-14 11:20:39,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 11:20:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:39,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 11:20:40,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:20:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:20:40,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:20:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:20:40,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671981584] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:20:40,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:20:40,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-14 11:20:40,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212669379] [2023-02-14 11:20:40,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:20:40,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 11:20:40,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 11:20:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-14 11:20:40,078 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:40,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:40,109 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2023-02-14 11:20:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:20:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-14 11:20:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:40,110 INFO L225 Difference]: With dead ends: 55 [2023-02-14 11:20:40,110 INFO L226 Difference]: Without dead ends: 35 [2023-02-14 11:20:40,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-14 11:20:40,111 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:40,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 33 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:20:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-14 11:20:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-14 11:20:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2023-02-14 11:20:40,114 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2023-02-14 11:20:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:40,114 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2023-02-14 11:20:40,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2023-02-14 11:20:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 11:20:40,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:40,116 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:40,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 11:20:40,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-14 11:20:40,321 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:40,322 INFO L85 PathProgramCache]: Analyzing trace with hash 55827240, now seen corresponding path program 2 times [2023-02-14 11:20:40,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:40,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675153263] [2023-02-14 11:20:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:40,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 11:20:40,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675153263] [2023-02-14 11:20:40,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675153263] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:20:40,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616740119] [2023-02-14 11:20:40,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:20:40,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:40,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:20:40,429 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) [2023-02-14 11:20:40,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 11:20:40,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:20:40,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:20:40,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 11:20:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:20:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 11:20:40,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:20:40,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616740119] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:20:40,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:20:40,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-02-14 11:20:40,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423218956] [2023-02-14 11:20:40,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:20:40,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:20:40,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:40,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:20:40,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 11:20:40,569 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:40,600 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2023-02-14 11:20:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 11:20:40,600 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-14 11:20:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:40,601 INFO L225 Difference]: With dead ends: 76 [2023-02-14 11:20:40,601 INFO L226 Difference]: Without dead ends: 48 [2023-02-14 11:20:40,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 11:20:40,602 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:40,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:20:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-14 11:20:40,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2023-02-14 11:20:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-14 11:20:40,605 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2023-02-14 11:20:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:40,606 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-14 11:20:40,606 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-14 11:20:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 11:20:40,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:40,607 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:40,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 11:20:40,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-02-14 11:20:40,812 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:40,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1789747366, now seen corresponding path program 1 times [2023-02-14 11:20:40,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:40,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763602490] [2023-02-14 11:20:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:40,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:20:40,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:40,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763602490] [2023-02-14 11:20:40,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763602490] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:20:40,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507771830] [2023-02-14 11:20:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:40,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:40,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:20:40,914 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) [2023-02-14 11:20:40,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 11:20:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:40,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 11:20:40,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:20:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:20:41,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:20:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:20:41,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507771830] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:20:41,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:20:41,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-14 11:20:41,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967681163] [2023-02-14 11:20:41,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:20:41,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 11:20:41,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:41,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 11:20:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:20:41,092 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:41,138 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-02-14 11:20:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 11:20:41,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-14 11:20:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:41,140 INFO L225 Difference]: With dead ends: 60 [2023-02-14 11:20:41,140 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 11:20:41,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:20:41,142 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:41,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:20:41,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 11:20:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-02-14 11:20:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-02-14 11:20:41,156 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 32 [2023-02-14 11:20:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:41,157 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-02-14 11:20:41,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-02-14 11:20:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 11:20:41,160 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:41,160 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:41,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 11:20:41,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:41,366 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1014530160, now seen corresponding path program 2 times [2023-02-14 11:20:41,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:41,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369327799] [2023-02-14 11:20:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:41,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 11:20:41,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369327799] [2023-02-14 11:20:41,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369327799] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:20:41,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992594507] [2023-02-14 11:20:41,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:20:41,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:41,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:20:41,457 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) [2023-02-14 11:20:41,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 11:20:41,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:20:41,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:20:41,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 11:20:41,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:20:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 11:20:41,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:20:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 11:20:41,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992594507] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:20:41,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:20:41,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-14 11:20:41,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610692756] [2023-02-14 11:20:41,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:20:41,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 11:20:41,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:41,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 11:20:41,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-02-14 11:20:41,622 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:41,664 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2023-02-14 11:20:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 11:20:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-14 11:20:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:41,666 INFO L225 Difference]: With dead ends: 65 [2023-02-14 11:20:41,666 INFO L226 Difference]: Without dead ends: 47 [2023-02-14 11:20:41,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-02-14 11:20:41,668 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:41,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 84 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:20:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-14 11:20:41,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-14 11:20:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2023-02-14 11:20:41,682 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 35 [2023-02-14 11:20:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:41,683 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2023-02-14 11:20:41,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2023-02-14 11:20:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 11:20:41,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:41,687 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:41,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 11:20:41,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:41,892 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:41,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1632294897, now seen corresponding path program 3 times [2023-02-14 11:20:41,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:41,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554102362] [2023-02-14 11:20:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:41,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 11:20:42,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:42,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554102362] [2023-02-14 11:20:42,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554102362] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:20:42,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138132590] [2023-02-14 11:20:42,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:20:42,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:42,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:20:42,034 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) [2023-02-14 11:20:42,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 11:20:42,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 11:20:42,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:20:42,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 11:20:42,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:20:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-14 11:20:42,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:20:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-14 11:20:42,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138132590] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:20:42,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:20:42,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2023-02-14 11:20:42,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072508244] [2023-02-14 11:20:42,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:20:42,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:20:42,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:20:42,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:20:42,238 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:42,604 INFO L93 Difference]: Finished difference Result 171 states and 220 transitions. [2023-02-14 11:20:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 11:20:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-14 11:20:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:42,606 INFO L225 Difference]: With dead ends: 171 [2023-02-14 11:20:42,606 INFO L226 Difference]: Without dead ends: 144 [2023-02-14 11:20:42,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=502, Invalid=980, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 11:20:42,607 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 505 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:42,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 58 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:20:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-14 11:20:42,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2023-02-14 11:20:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2735849056603774) internal successors, (135), 106 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2023-02-14 11:20:42,623 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 44 [2023-02-14 11:20:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:42,624 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2023-02-14 11:20:42,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2023-02-14 11:20:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-14 11:20:42,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:42,626 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:42,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 11:20:42,831 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,SelfDestructingSolverStorable9 [2023-02-14 11:20:42,832 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:42,833 INFO L85 PathProgramCache]: Analyzing trace with hash -919071665, now seen corresponding path program 4 times [2023-02-14 11:20:42,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:42,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773220507] [2023-02-14 11:20:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:42,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 262 proven. 35 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-02-14 11:20:43,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773220507] [2023-02-14 11:20:43,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773220507] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:20:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615932471] [2023-02-14 11:20:43,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:20:43,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:43,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:20:43,057 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) [2023-02-14 11:20:43,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 11:20:43,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:20:43,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:20:43,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 11:20:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:20:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2023-02-14 11:20:43,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:20:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2023-02-14 11:20:43,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615932471] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:20:43,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:20:43,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2023-02-14 11:20:43,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888794734] [2023-02-14 11:20:43,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:20:43,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 11:20:43,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:20:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 11:20:43,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-02-14 11:20:43,508 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:44,379 INFO L93 Difference]: Finished difference Result 322 states and 416 transitions. [2023-02-14 11:20:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-14 11:20:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-02-14 11:20:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:44,381 INFO L225 Difference]: With dead ends: 322 [2023-02-14 11:20:44,381 INFO L226 Difference]: Without dead ends: 251 [2023-02-14 11:20:44,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1347, Invalid=4659, Unknown=0, NotChecked=0, Total=6006 [2023-02-14 11:20:44,385 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1172 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:44,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 114 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:20:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-02-14 11:20:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 131. [2023-02-14 11:20:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2538461538461538) internal successors, (163), 130 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2023-02-14 11:20:44,400 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 104 [2023-02-14 11:20:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:44,401 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2023-02-14 11:20:44,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:20:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2023-02-14 11:20:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-14 11:20:44,405 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:44,405 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 6, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:44,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 11:20:44,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:44,611 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:44,612 INFO L85 PathProgramCache]: Analyzing trace with hash 964759091, now seen corresponding path program 5 times [2023-02-14 11:20:44,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:44,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437236402] [2023-02-14 11:20:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:44,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 367 proven. 51 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2023-02-14 11:20:44,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:44,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437236402] [2023-02-14 11:20:44,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437236402] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:20:44,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215143736] [2023-02-14 11:20:44,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:20:44,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:44,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:20:44,850 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) [2023-02-14 11:20:44,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 11:25:00,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2023-02-14 11:25:00,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:25:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 11:25:00,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:25:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 614 proven. 51 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2023-02-14 11:25:00,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:25:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 493 proven. 172 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2023-02-14 11:25:00,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215143736] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:25:00,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:25:00,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-02-14 11:25:00,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317484732] [2023-02-14 11:25:00,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:25:00,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 11:25:00,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:25:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 11:25:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2023-02-14 11:25:00,694 INFO L87 Difference]: Start difference. First operand 131 states and 163 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:25:00,836 INFO L93 Difference]: Finished difference Result 319 states and 438 transitions. [2023-02-14 11:25:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 11:25:00,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-02-14 11:25:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:25:00,837 INFO L225 Difference]: With dead ends: 319 [2023-02-14 11:25:00,837 INFO L226 Difference]: Without dead ends: 227 [2023-02-14 11:25:00,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2023-02-14 11:25:00,838 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:25:00,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 80 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:25:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-02-14 11:25:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-02-14 11:25:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.2876106194690264) internal successors, (291), 226 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 291 transitions. [2023-02-14 11:25:00,851 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 291 transitions. Word has length 128 [2023-02-14 11:25:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:25:00,852 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 291 transitions. [2023-02-14 11:25:00,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 291 transitions. [2023-02-14 11:25:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-02-14 11:25:00,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:25:00,853 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 6, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:25:00,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 11:25:01,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:25:01,078 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:25:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:25:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash 649548339, now seen corresponding path program 6 times [2023-02-14 11:25:01,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:25:01,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499986320] [2023-02-14 11:25:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:25:01,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:25:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:25:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4952 backedges. 1855 proven. 287 refuted. 0 times theorem prover too weak. 2810 trivial. 0 not checked. [2023-02-14 11:25:01,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:25:01,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499986320] [2023-02-14 11:25:01,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499986320] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:25:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305867635] [2023-02-14 11:25:01,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:25:01,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:25:01,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:25:01,815 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) [2023-02-14 11:25:01,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 11:25:03,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-14 11:25:03,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:25:03,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 11:25:03,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:25:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4952 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2023-02-14 11:25:03,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:25:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4952 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2023-02-14 11:25:04,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305867635] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:25:04,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:25:04,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2023-02-14 11:25:04,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881731482] [2023-02-14 11:25:04,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:25:04,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 11:25:04,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:25:04,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 11:25:04,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=799, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 11:25:04,170 INFO L87 Difference]: Start difference. First operand 227 states and 291 transitions. Second operand has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:25:11,699 INFO L93 Difference]: Finished difference Result 1116 states and 1464 transitions. [2023-02-14 11:25:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2023-02-14 11:25:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2023-02-14 11:25:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:25:11,715 INFO L225 Difference]: With dead ends: 1116 [2023-02-14 11:25:11,715 INFO L226 Difference]: Without dead ends: 952 [2023-02-14 11:25:11,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25591 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=18859, Invalid=47447, Unknown=0, NotChecked=0, Total=66306 [2023-02-14 11:25:11,750 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3969 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3969 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:25:11,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3969 Valid, 122 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:25:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2023-02-14 11:25:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 263. [2023-02-14 11:25:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.2633587786259541) internal successors, (331), 262 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 331 transitions. [2023-02-14 11:25:11,770 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 331 transitions. Word has length 224 [2023-02-14 11:25:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:25:11,770 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 331 transitions. [2023-02-14 11:25:11,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 331 transitions. [2023-02-14 11:25:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-02-14 11:25:11,771 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:25:11,772 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 14, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:25:11,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 11:25:11,981 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,SelfDestructingSolverStorable12 [2023-02-14 11:25:11,981 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:25:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:25:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1761221199, now seen corresponding path program 7 times [2023-02-14 11:25:11,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:25:11,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28843325] [2023-02-14 11:25:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:25:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:25:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:25:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3442 trivial. 0 not checked. [2023-02-14 11:25:12,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:25:12,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28843325] [2023-02-14 11:25:12,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28843325] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:25:12,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403439174] [2023-02-14 11:25:12,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:25:12,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:25:12,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:25:12,677 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) [2023-02-14 11:25:12,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 11:25:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:25:13,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 11:25:13,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:25:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3442 trivial. 0 not checked. [2023-02-14 11:25:13,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:25:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3442 trivial. 0 not checked. [2023-02-14 11:25:13,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403439174] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:25:13,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:25:13,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 40 [2023-02-14 11:25:13,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247670530] [2023-02-14 11:25:13,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:25:13,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-14 11:25:13,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:25:13,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-14 11:25:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=923, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 11:25:13,505 INFO L87 Difference]: Start difference. First operand 263 states and 331 transitions. Second operand has 40 states, 40 states have (on average 3.475) internal successors, (139), 40 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:25:13,654 INFO L93 Difference]: Finished difference Result 520 states and 678 transitions. [2023-02-14 11:25:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 11:25:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.475) internal successors, (139), 40 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2023-02-14 11:25:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:25:13,655 INFO L225 Difference]: With dead ends: 520 [2023-02-14 11:25:13,655 INFO L226 Difference]: Without dead ends: 323 [2023-02-14 11:25:13,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 487 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=737, Invalid=1155, Unknown=0, NotChecked=0, Total=1892 [2023-02-14 11:25:13,656 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 99 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:25:13,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 146 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:25:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-02-14 11:25:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2023-02-14 11:25:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.2763975155279503) internal successors, (411), 322 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 411 transitions. [2023-02-14 11:25:13,698 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 411 transitions. Word has length 260 [2023-02-14 11:25:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:25:13,698 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 411 transitions. [2023-02-14 11:25:13,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.475) internal successors, (139), 40 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 411 transitions. [2023-02-14 11:25:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2023-02-14 11:25:13,701 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:25:13,701 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 14, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:25:13,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-14 11:25:13,907 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,SelfDestructingSolverStorable13 [2023-02-14 11:25:13,907 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:25:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:25:13,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1030632653, now seen corresponding path program 8 times [2023-02-14 11:25:13,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:25:13,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168151551] [2023-02-14 11:25:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:25:13,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:25:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:25:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2023-02-14 11:25:14,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:25:14,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168151551] [2023-02-14 11:25:14,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168151551] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:25:14,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547123153] [2023-02-14 11:25:14,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:25:14,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:25:14,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:25:14,336 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) [2023-02-14 11:25:14,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 11:25:14,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:25:14,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:25:14,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1929 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 11:25:14,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:25:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2023-02-14 11:25:15,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:25:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2023-02-14 11:25:15,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547123153] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:25:15,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:25:15,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-02-14 11:25:15,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570170357] [2023-02-14 11:25:15,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:25:15,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:25:15,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:25:15,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:25:15,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:25:15,648 INFO L87 Difference]: Start difference. First operand 323 states and 411 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:25:15,831 INFO L93 Difference]: Finished difference Result 531 states and 663 transitions. [2023-02-14 11:25:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 11:25:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 320 [2023-02-14 11:25:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:25:15,833 INFO L225 Difference]: With dead ends: 531 [2023-02-14 11:25:15,833 INFO L226 Difference]: Without dead ends: 480 [2023-02-14 11:25:15,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 629 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2023-02-14 11:25:15,834 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 206 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:25:15,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 79 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:25:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-02-14 11:25:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 386. [2023-02-14 11:25:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.2857142857142858) internal successors, (495), 385 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 495 transitions. [2023-02-14 11:25:15,868 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 495 transitions. Word has length 320 [2023-02-14 11:25:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:25:15,869 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 495 transitions. [2023-02-14 11:25:15,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:25:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 495 transitions. [2023-02-14 11:25:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-02-14 11:25:15,872 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:25:15,872 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 14, 14, 14, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:25:15,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 11:25:16,080 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,SelfDestructingSolverStorable14 [2023-02-14 11:25:16,080 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:25:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:25:16,081 INFO L85 PathProgramCache]: Analyzing trace with hash -974828135, now seen corresponding path program 9 times [2023-02-14 11:25:16,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:25:16,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808709205] [2023-02-14 11:25:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:25:16,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:25:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:25:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15707 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2023-02-14 11:25:17,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:25:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808709205] [2023-02-14 11:25:17,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808709205] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:25:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482936580] [2023-02-14 11:25:17,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:25:17,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:25:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:25:17,075 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) [2023-02-14 11:25:17,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 11:25:17,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-14 11:25:17,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:25:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-14 11:25:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:25:17,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-02-14 11:25:17,694 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-14 11:25:17,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2023-02-14 11:25:17,752 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-14 11:25:17,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2023-02-14 11:25:17,814 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-14 11:25:17,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2023-02-14 11:25:17,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:25:17,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:25:17,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:25:17,873 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:25:17,873 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:25:17,876 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-14 11:25:17,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 58 [2023-02-14 11:25:18,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:25:18,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:25:18,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:25:18,065 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:25:18,066 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:25:18,070 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-14 11:25:18,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 73 [2023-02-14 11:25:18,605 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:25:18,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:25:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:25:18,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:25:18,609 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:25:18,610 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:25:18,626 INFO L321 Elim1Store]: treesize reduction 85, result has 22.0 percent of original size [2023-02-14 11:25:18,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 91 [2023-02-14 11:25:18,786 INFO L321 Elim1Store]: treesize reduction 58, result has 31.8 percent of original size [2023-02-14 11:25:18,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 86 treesize of output 65 [2023-02-14 11:25:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15707 backedges. 524 proven. 4 refuted. 0 times theorem prover too weak. 15179 trivial. 0 not checked. [2023-02-14 11:25:18,825 INFO L328 TraceCheckSpWp]: Computing backward predicates...