./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sep.i -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 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 10:23:00,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 10:23:00,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 10:23:00,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 10:23:00,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 10:23:00,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 10:23:00,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 10:23:00,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 10:23:00,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 10:23:00,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 10:23:00,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 10:23:00,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 10:23:00,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 10:23:00,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 10:23:00,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 10:23:00,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 10:23:00,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 10:23:00,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 10:23:00,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 10:23:00,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 10:23:00,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 10:23:00,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 10:23:00,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 10:23:00,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 10:23:00,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 10:23:00,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 10:23:00,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 10:23:00,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 10:23:00,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 10:23:00,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 10:23:00,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 10:23:00,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 10:23:00,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 10:23:00,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 10:23:00,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 10:23:00,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 10:23:00,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 10:23:00,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 10:23:00,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 10:23:00,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 10:23:00,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 10:23:00,516 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 10:23:00,532 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 10:23:00,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 10:23:00,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 10:23:00,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 10:23:00,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 10:23:00,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 10:23:00,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 10:23:00,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 10:23:00,535 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 10:23:00,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 10:23:00,535 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 10:23:00,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 10:23:00,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 10:23:00,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 10:23:00,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 10:23:00,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 10:23:00,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 10:23:00,537 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 10:23:00,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 10:23:00,537 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 10:23:00,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 10:23:00,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 10:23:00,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 10:23:00,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 10:23:00,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:23:00,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 10:23:00,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 10:23:00,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 10:23:00,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 10:23:00,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 10:23:00,539 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 10:23:00,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 10:23:00,539 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 10:23:00,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 10:23:00,540 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 10:23:00,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2023-02-18 10:23:00,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 10:23:00,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 10:23:00,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 10:23:00,778 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 10:23:00,778 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 10:23:00,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep.i [2023-02-18 10:23:01,872 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 10:23:02,033 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 10:23:02,034 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i [2023-02-18 10:23:02,039 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023b41082/2ea8163cac294605be4f89af6a64b402/FLAGd5dc8d132 [2023-02-18 10:23:02,050 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023b41082/2ea8163cac294605be4f89af6a64b402 [2023-02-18 10:23:02,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 10:23:02,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 10:23:02,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 10:23:02,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 10:23:02,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 10:23:02,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321f745b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02, skipping insertion in model container [2023-02-18 10:23:02,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 10:23:02,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 10:23:02,210 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/reducercommutativity/sep.i[1298,1311] [2023-02-18 10:23:02,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:23:02,223 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 10:23:02,241 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/reducercommutativity/sep.i[1298,1311] [2023-02-18 10:23:02,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:23:02,254 INFO L208 MainTranslator]: Completed translation [2023-02-18 10:23:02,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02 WrapperNode [2023-02-18 10:23:02,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 10:23:02,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 10:23:02,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 10:23:02,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 10:23:02,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,282 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2023-02-18 10:23:02,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 10:23:02,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 10:23:02,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 10:23:02,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 10:23:02,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,303 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 10:23:02,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 10:23:02,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 10:23:02,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 10:23:02,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (1/1) ... [2023-02-18 10:23:02,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:23:02,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:02,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 10:23:02,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 10:23:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 10:23:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 10:23:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 10:23:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 10:23:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 10:23:02,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 10:23:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 10:23:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 10:23:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-02-18 10:23:02,364 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-02-18 10:23:02,421 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 10:23:02,423 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 10:23:02,628 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 10:23:02,634 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 10:23:02,635 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 10:23:02,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:23:02 BoogieIcfgContainer [2023-02-18 10:23:02,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 10:23:02,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 10:23:02,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 10:23:02,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 10:23:02,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 10:23:02" (1/3) ... [2023-02-18 10:23:02,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34096c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:23:02, skipping insertion in model container [2023-02-18 10:23:02,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:02" (2/3) ... [2023-02-18 10:23:02,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34096c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:23:02, skipping insertion in model container [2023-02-18 10:23:02,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:23:02" (3/3) ... [2023-02-18 10:23:02,671 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2023-02-18 10:23:02,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 10:23:02,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 10:23:02,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 10:23:02,739 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;@649dfd3f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 10:23:02,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 10:23:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:23:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 10:23:02,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:02,748 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:02,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:02,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1158480486, now seen corresponding path program 1 times [2023-02-18 10:23:02,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:02,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896388563] [2023-02-18 10:23:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:02,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:03,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:23:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:03,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 10:23:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:03,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-18 10:23:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 10:23:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896388563] [2023-02-18 10:23:03,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896388563] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:03,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804515911] [2023-02-18 10:23:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:03,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:03,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:03,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:03,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 10:23:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 10:23:03,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 10:23:03,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:23:03,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804515911] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:23:03,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:23:03,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-02-18 10:23:03,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622842527] [2023-02-18 10:23:03,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:23:03,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 10:23:03,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:03,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 10:23:03,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:23:03,279 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 10:23:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:03,295 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-02-18 10:23:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 10:23:03,300 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-02-18 10:23:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:03,306 INFO L225 Difference]: With dead ends: 50 [2023-02-18 10:23:03,306 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 10:23:03,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:23:03,311 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2023-02-18 10:23:03,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:03,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 10:23:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 10:23:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:23:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-18 10:23:03,344 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-02-18 10:23:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:03,345 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-18 10:23:03,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 10:23:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-18 10:23:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 10:23:03,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:03,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:03,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:03,553 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,SelfDestructingSolverStorable0 [2023-02-18 10:23:03,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1033293076, now seen corresponding path program 1 times [2023-02-18 10:23:03,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:03,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786524294] [2023-02-18 10:23:03,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:03,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:03,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:23:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:03,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 10:23:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:03,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-18 10:23:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 10:23:03,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:03,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786524294] [2023-02-18 10:23:03,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786524294] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875871786] [2023-02-18 10:23:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:03,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:03,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:03,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:03,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 10:23:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:03,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 10:23:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 10:23:03,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:23:03,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875871786] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:23:03,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:23:03,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-02-18 10:23:03,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288715203] [2023-02-18 10:23:03,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:23:03,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 10:23:03,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:03,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 10:23:03,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 10:23:03,826 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 10:23:03,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:03,873 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-02-18 10:23:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 10:23:03,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-02-18 10:23:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:03,875 INFO L225 Difference]: With dead ends: 43 [2023-02-18 10:23:03,875 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 10:23:03,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 10:23:03,878 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:03,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:03,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 10:23:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-02-18 10:23:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:23:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-18 10:23:03,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2023-02-18 10:23:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:03,895 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-18 10:23:03,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 10:23:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-18 10:23:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 10:23:03,897 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:03,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:03,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:04,103 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,SelfDestructingSolverStorable1 [2023-02-18 10:23:04,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:04,105 INFO L85 PathProgramCache]: Analyzing trace with hash -14370886, now seen corresponding path program 1 times [2023-02-18 10:23:04,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:04,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466127634] [2023-02-18 10:23:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:04,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:04,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:23:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:04,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 10:23:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:04,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 10:23:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-18 10:23:04,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466127634] [2023-02-18 10:23:04,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466127634] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:23:04,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 10:23:04,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 10:23:04,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562654164] [2023-02-18 10:23:04,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:23:04,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 10:23:04,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:04,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 10:23:04,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 10:23:04,256 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 10:23:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:04,284 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-02-18 10:23:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 10:23:04,285 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), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-02-18 10:23:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:04,286 INFO L225 Difference]: With dead ends: 39 [2023-02-18 10:23:04,286 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 10:23:04,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 10:23:04,288 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:04,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 10:23:04,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-18 10:23:04,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:23:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-18 10:23:04,293 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 37 [2023-02-18 10:23:04,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:04,293 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-18 10:23:04,293 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), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 10:23:04,294 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-18 10:23:04,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 10:23:04,295 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:04,295 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:04,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 10:23:04,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:04,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1444896732, now seen corresponding path program 1 times [2023-02-18 10:23:04,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:04,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491856085] [2023-02-18 10:23:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:04,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:04,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:23:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:04,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 10:23:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:04,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 10:23:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 10:23:04,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:04,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491856085] [2023-02-18 10:23:04,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491856085] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:04,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998715070] [2023-02-18 10:23:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:04,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:04,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:04,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:04,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 10:23:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:04,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 10:23:04,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 10:23:04,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 10:23:04,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998715070] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:04,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:04,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2023-02-18 10:23:04,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981108138] [2023-02-18 10:23:04,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:04,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 10:23:04,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 10:23:04,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 10:23:04,583 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:23:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:04,666 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2023-02-18 10:23:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 10:23:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-02-18 10:23:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:04,668 INFO L225 Difference]: With dead ends: 49 [2023-02-18 10:23:04,668 INFO L226 Difference]: Without dead ends: 29 [2023-02-18 10:23:04,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-18 10:23:04,670 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:04,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:23:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-18 10:23:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-02-18 10:23:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:23:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-18 10:23:04,674 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 39 [2023-02-18 10:23:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:04,675 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-18 10:23:04,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:23:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-18 10:23:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 10:23:04,676 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:04,676 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:04,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:04,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:04,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1089239822, now seen corresponding path program 2 times [2023-02-18 10:23:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:04,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891507999] [2023-02-18 10:23:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:04,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:05,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:23:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:05,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-18 10:23:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:05,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-18 10:23:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 10:23:05,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891507999] [2023-02-18 10:23:05,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891507999] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78024801] [2023-02-18 10:23:05,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:23:05,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:05,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:05,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:05,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 10:23:05,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:23:05,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:05,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 10:23:05,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-18 10:23:08,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-18 10:23:08,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78024801] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:08,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:08,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-02-18 10:23:08,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740798099] [2023-02-18 10:23:08,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:08,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 10:23:08,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:08,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 10:23:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-18 10:23:08,994 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 10:23:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:09,192 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2023-02-18 10:23:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 10:23:09,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2023-02-18 10:23:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:09,195 INFO L225 Difference]: With dead ends: 73 [2023-02-18 10:23:09,196 INFO L226 Difference]: Without dead ends: 69 [2023-02-18 10:23:09,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 29 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-02-18 10:23:09,197 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:09,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 478 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 10:23:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-18 10:23:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2023-02-18 10:23:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-18 10:23:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2023-02-18 10:23:09,211 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 48 [2023-02-18 10:23:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:09,211 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2023-02-18 10:23:09,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 10:23:09,212 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2023-02-18 10:23:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 10:23:09,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:09,214 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:09,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 10:23:09,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:09,421 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash -409181452, now seen corresponding path program 1 times [2023-02-18 10:23:09,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:09,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177906557] [2023-02-18 10:23:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:09,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:09,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:23:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:10,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-18 10:23:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:10,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-18 10:23:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 10:23:10,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:10,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177906557] [2023-02-18 10:23:10,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177906557] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:10,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999051459] [2023-02-18 10:23:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:10,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:10,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:10,483 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:10,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 10:23:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-18 10:23:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:10,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 10:23:10,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 112 treesize of output 100 [2023-02-18 10:23:10,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-18 10:23:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 10:23:11,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:11,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 48 treesize of output 44 [2023-02-18 10:23:11,448 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 102 treesize of output 86 [2023-02-18 10:23:11,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 22 [2023-02-18 10:23:11,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:23:11,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:23:11,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 86 [2023-02-18 10:23:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 10:23:11,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999051459] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:11,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:11,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 19] total 48 [2023-02-18 10:23:11,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676596261] [2023-02-18 10:23:11,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:11,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 10:23:11,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 10:23:11,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1959, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 10:23:11,964 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 48 states, 43 states have (on average 2.441860465116279) internal successors, (105), 46 states have internal predecessors, (105), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 10:23:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:14,911 INFO L93 Difference]: Finished difference Result 306 states and 455 transitions. [2023-02-18 10:23:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-02-18 10:23:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.441860465116279) internal successors, (105), 46 states have internal predecessors, (105), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) Word has length 48 [2023-02-18 10:23:14,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:14,915 INFO L225 Difference]: With dead ends: 306 [2023-02-18 10:23:14,915 INFO L226 Difference]: Without dead ends: 265 [2023-02-18 10:23:14,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 62 SyntacticMatches, 14 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3532 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1717, Invalid=9839, Unknown=0, NotChecked=0, Total=11556 [2023-02-18 10:23:14,921 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 499 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:14,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 413 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 10:23:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-02-18 10:23:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 187. [2023-02-18 10:23:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 162 states have (on average 1.3395061728395061) internal successors, (217), 168 states have internal predecessors, (217), 13 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (55), 13 states have call predecessors, (55), 13 states have call successors, (55) [2023-02-18 10:23:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 285 transitions. [2023-02-18 10:23:14,960 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 285 transitions. Word has length 48 [2023-02-18 10:23:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:14,960 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 285 transitions. [2023-02-18 10:23:14,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.441860465116279) internal successors, (105), 46 states have internal predecessors, (105), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 10:23:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 285 transitions. [2023-02-18 10:23:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 10:23:14,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:14,964 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:14,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:15,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:15,171 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:15,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:15,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1360360308, now seen corresponding path program 2 times [2023-02-18 10:23:15,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:15,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083521535] [2023-02-18 10:23:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:15,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:15,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:23:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:15,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-18 10:23:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:15,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-18 10:23:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 10:23:15,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:15,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083521535] [2023-02-18 10:23:15,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083521535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:15,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999273024] [2023-02-18 10:23:15,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:23:15,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:15,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:15,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:15,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 10:23:15,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:23:15,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 10:23:15,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:16,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:23:16,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:23:16,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 48 [2023-02-18 10:23:16,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:23:16,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:23:16,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 27 [2023-02-18 10:23:16,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-18 10:23:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 73 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 10:23:16,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:16,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 74 treesize of output 68 [2023-02-18 10:23:16,477 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 157 treesize of output 133 [2023-02-18 10:23:16,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:23:16,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 319 treesize of output 257 [2023-02-18 10:23:16,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:23:16,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 313 treesize of output 270 [2023-02-18 10:23:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 10:23:16,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999273024] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:16,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:16,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 17] total 45 [2023-02-18 10:23:16,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076433058] [2023-02-18 10:23:16,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:16,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 10:23:16,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 10:23:16,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 10:23:16,946 INFO L87 Difference]: Start difference. First operand 187 states and 285 transitions. Second operand has 45 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 10:23:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:20,462 INFO L93 Difference]: Finished difference Result 710 states and 1000 transitions. [2023-02-18 10:23:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-02-18 10:23:20,462 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) Word has length 48 [2023-02-18 10:23:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:20,465 INFO L225 Difference]: With dead ends: 710 [2023-02-18 10:23:20,466 INFO L226 Difference]: Without dead ends: 482 [2023-02-18 10:23:20,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6757 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2189, Invalid=17551, Unknown=0, NotChecked=0, Total=19740 [2023-02-18 10:23:20,474 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 506 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:20,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 637 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 10:23:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-02-18 10:23:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 331. [2023-02-18 10:23:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 287 states have (on average 1.3101045296167246) internal successors, (376), 303 states have internal predecessors, (376), 17 states have call successors, (17), 10 states have call predecessors, (17), 26 states have return successors, (71), 17 states have call predecessors, (71), 17 states have call successors, (71) [2023-02-18 10:23:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 464 transitions. [2023-02-18 10:23:20,539 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 464 transitions. Word has length 48 [2023-02-18 10:23:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:20,539 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 464 transitions. [2023-02-18 10:23:20,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 10:23:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 464 transitions. [2023-02-18 10:23:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 10:23:20,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:20,542 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:20,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:20,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:20,749 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash -868345224, now seen corresponding path program 3 times [2023-02-18 10:23:20,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:20,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419970645] [2023-02-18 10:23:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:20,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:21,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:23:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:21,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-18 10:23:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:21,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-18 10:23:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 10:23:21,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:21,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419970645] [2023-02-18 10:23:21,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419970645] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:21,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583523429] [2023-02-18 10:23:21,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:23:21,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:21,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:21,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 10:23:21,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 10:23:21,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:21,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 10:23:21,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 10:23:21,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 10:23:21,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583523429] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:21,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:21,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-02-18 10:23:21,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058908000] [2023-02-18 10:23:21,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:21,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 10:23:21,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:21,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 10:23:21,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-18 10:23:21,639 INFO L87 Difference]: Start difference. First operand 331 states and 464 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 10:23:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:21,845 INFO L93 Difference]: Finished difference Result 599 states and 940 transitions. [2023-02-18 10:23:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 10:23:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2023-02-18 10:23:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:21,850 INFO L225 Difference]: With dead ends: 599 [2023-02-18 10:23:21,850 INFO L226 Difference]: Without dead ends: 595 [2023-02-18 10:23:21,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 71 SyntacticMatches, 30 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-02-18 10:23:21,852 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 30 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:21,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 604 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:23:21,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-02-18 10:23:21,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 467. [2023-02-18 10:23:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 409 states have (on average 1.3643031784841075) internal successors, (558), 433 states have internal predecessors, (558), 23 states have call successors, (23), 10 states have call predecessors, (23), 34 states have return successors, (119), 23 states have call predecessors, (119), 23 states have call successors, (119) [2023-02-18 10:23:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 700 transitions. [2023-02-18 10:23:21,952 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 700 transitions. Word has length 48 [2023-02-18 10:23:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:21,952 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 700 transitions. [2023-02-18 10:23:21,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 10:23:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 700 transitions. [2023-02-18 10:23:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 10:23:21,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:21,956 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:21,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:22,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:22,162 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:22,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:22,163 INFO L85 PathProgramCache]: Analyzing trace with hash -610179786, now seen corresponding path program 4 times [2023-02-18 10:23:22,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:22,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538573266] [2023-02-18 10:23:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:22,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:22,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:23:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-18 10:23:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:22,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-18 10:23:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 10:23:22,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:22,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538573266] [2023-02-18 10:23:22,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538573266] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:22,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266903907] [2023-02-18 10:23:22,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 10:23:22,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:22,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:22,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 10:23:23,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 10:23:23,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:23,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-18 10:23:23,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:23,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:23:23,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 105 [2023-02-18 10:23:23,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:23:23,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 352 treesize of output 1448