./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-16 23:35:21,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 23:35:21,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 23:35:21,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 23:35:21,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 23:35:21,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 23:35:21,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 23:35:21,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 23:35:21,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 23:35:21,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 23:35:21,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 23:35:21,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 23:35:21,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 23:35:21,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 23:35:21,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 23:35:21,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 23:35:21,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 23:35:21,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 23:35:21,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 23:35:21,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 23:35:21,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 23:35:21,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 23:35:21,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 23:35:21,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 23:35:21,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 23:35:21,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 23:35:21,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 23:35:21,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 23:35:21,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 23:35:21,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 23:35:21,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 23:35:21,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 23:35:21,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 23:35:21,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 23:35:21,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 23:35:21,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 23:35:21,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 23:35:21,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 23:35:21,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 23:35:21,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 23:35:21,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 23:35:21,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 23:35:21,423 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 23:35:21,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 23:35:21,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 23:35:21,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 23:35:21,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 23:35:21,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 23:35:21,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 23:35:21,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 23:35:21,426 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 23:35:21,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 23:35:21,426 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 23:35:21,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 23:35:21,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 23:35:21,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 23:35:21,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 23:35:21,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 23:35:21,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 23:35:21,427 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 23:35:21,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 23:35:21,428 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 23:35:21,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 23:35:21,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 23:35:21,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 23:35:21,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 23:35:21,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:35:21,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 23:35:21,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 23:35:21,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 23:35:21,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 23:35:21,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 23:35:21,429 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 23:35:21,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 23:35:21,430 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 23:35:21,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 23:35:21,430 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 23:35:21,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 [2023-02-16 23:35:21,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 23:35:21,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 23:35:21,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 23:35:21,665 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 23:35:21,666 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 23:35:21,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2023-02-16 23:35:22,795 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 23:35:22,971 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 23:35:22,972 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2023-02-16 23:35:22,979 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5183f10e/96ca644a9beb4978ac5dfefbe4d26ab6/FLAG24bfb6a5b [2023-02-16 23:35:23,002 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5183f10e/96ca644a9beb4978ac5dfefbe4d26ab6 [2023-02-16 23:35:23,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 23:35:23,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 23:35:23,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 23:35:23,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 23:35:23,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 23:35:23,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7712b949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23, skipping insertion in model container [2023-02-16 23:35:23,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 23:35:23,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 23:35:23,156 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421] [2023-02-16 23:35:23,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:35:23,184 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 23:35:23,192 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421] [2023-02-16 23:35:23,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:35:23,212 INFO L208 MainTranslator]: Completed translation [2023-02-16 23:35:23,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23 WrapperNode [2023-02-16 23:35:23,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 23:35:23,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 23:35:23,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 23:35:23,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 23:35:23,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,240 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2023-02-16 23:35:23,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 23:35:23,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 23:35:23,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 23:35:23,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 23:35:23,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,259 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 23:35:23,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 23:35:23,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 23:35:23,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 23:35:23,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (1/1) ... [2023-02-16 23:35:23,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:35:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:35:23,291 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) [2023-02-16 23:35:23,294 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 [2023-02-16 23:35:23,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 23:35:23,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 23:35:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 23:35:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 23:35:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 23:35:23,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 23:35:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 23:35:23,413 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 23:35:23,415 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 23:35:23,632 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 23:35:23,636 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 23:35:23,639 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-16 23:35:23,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:35:23 BoogieIcfgContainer [2023-02-16 23:35:23,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 23:35:23,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 23:35:23,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 23:35:23,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 23:35:23,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 11:35:23" (1/3) ... [2023-02-16 23:35:23,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3693ed54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:35:23, skipping insertion in model container [2023-02-16 23:35:23,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:35:23" (2/3) ... [2023-02-16 23:35:23,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3693ed54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:35:23, skipping insertion in model container [2023-02-16 23:35:23,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:35:23" (3/3) ... [2023-02-16 23:35:23,648 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2023-02-16 23:35:23,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 23:35:23,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 23:35:23,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 23:35:23,694 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;@4076c732, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 23:35:23,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 23:35:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:23,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 23:35:23,703 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:35:23,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:35:23,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:35:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:35:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2023-02-16 23:35:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:35:23,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924424730] [2023-02-16 23:35:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:35:23,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:35:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:35:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:35:23,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:35:23,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924424730] [2023-02-16 23:35:23,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924424730] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:35:23,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:35:23,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 23:35:23,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406507149] [2023-02-16 23:35:23,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:35:23,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 23:35:23,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:35:23,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 23:35:23,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 23:35:23,866 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:35:23,878 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2023-02-16 23:35:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 23:35:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-16 23:35:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:35:23,884 INFO L225 Difference]: With dead ends: 83 [2023-02-16 23:35:23,884 INFO L226 Difference]: Without dead ends: 39 [2023-02-16 23:35:23,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 23:35:23,888 INFO L413 NwaCegarLoop]: 55 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, 55 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 [2023-02-16 23:35:23,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:35:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-16 23:35:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-16 23:35:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-02-16 23:35:23,935 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2023-02-16 23:35:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:35:23,936 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-02-16 23:35:23,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-02-16 23:35:23,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 23:35:23,937 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:35:23,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:35:23,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 23:35:23,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:35:23,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:35:23,938 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2023-02-16 23:35:23,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:35:23,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277628572] [2023-02-16 23:35:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:35:23,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:35:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:35:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:35:24,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:35:24,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277628572] [2023-02-16 23:35:24,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277628572] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:35:24,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:35:24,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 23:35:24,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053889303] [2023-02-16 23:35:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:35:24,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 23:35:24,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:35:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 23:35:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:35:24,082 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:35:24,159 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2023-02-16 23:35:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 23:35:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-16 23:35:24,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:35:24,160 INFO L225 Difference]: With dead ends: 75 [2023-02-16 23:35:24,160 INFO L226 Difference]: Without dead ends: 41 [2023-02-16 23:35:24,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:35:24,162 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:35:24,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:35:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-16 23:35:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-02-16 23:35:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-02-16 23:35:24,180 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2023-02-16 23:35:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:35:24,181 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-02-16 23:35:24,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-02-16 23:35:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 23:35:24,185 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:35:24,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:35:24,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 23:35:24,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:35:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:35:24,189 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2023-02-16 23:35:24,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:35:24,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887486978] [2023-02-16 23:35:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:35:24,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:35:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:35:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 23:35:24,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:35:24,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887486978] [2023-02-16 23:35:24,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887486978] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:35:24,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:35:24,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 23:35:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953832048] [2023-02-16 23:35:24,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:35:24,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 23:35:24,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:35:24,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 23:35:24,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 23:35:24,275 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:35:24,350 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2023-02-16 23:35:24,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 23:35:24,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-16 23:35:24,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:35:24,351 INFO L225 Difference]: With dead ends: 92 [2023-02-16 23:35:24,351 INFO L226 Difference]: Without dead ends: 61 [2023-02-16 23:35:24,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 23:35:24,352 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:35:24,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 19 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:35:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-16 23:35:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2023-02-16 23:35:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-16 23:35:24,358 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2023-02-16 23:35:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:35:24,358 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-16 23:35:24,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-16 23:35:24,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-16 23:35:24,360 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:35:24,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:35:24,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 23:35:24,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:35:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:35:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2023-02-16 23:35:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:35:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626569954] [2023-02-16 23:35:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:35:24,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:35:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:35:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 23:35:24,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:35:24,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626569954] [2023-02-16 23:35:24,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626569954] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:35:24,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109635369] [2023-02-16 23:35:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:35:24,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:35:24,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:35:24,460 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) [2023-02-16 23:35:24,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 23:35:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:35:24,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:35:24,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:35:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 23:35:24,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:35:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 23:35:24,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109635369] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:35:24,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:35:24,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-16 23:35:24,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826481822] [2023-02-16 23:35:24,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:35:24,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 23:35:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:35:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 23:35:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-16 23:35:24,561 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:35:24,648 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2023-02-16 23:35:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 23:35:24,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-16 23:35:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:35:24,649 INFO L225 Difference]: With dead ends: 97 [2023-02-16 23:35:24,649 INFO L226 Difference]: Without dead ends: 53 [2023-02-16 23:35:24,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-16 23:35:24,650 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:35:24,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:35:24,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-16 23:35:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-02-16 23:35:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-02-16 23:35:24,655 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2023-02-16 23:35:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:35:24,655 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-02-16 23:35:24,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-02-16 23:35:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-16 23:35:24,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:35:24,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:35:24,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 23:35:24,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:35:24,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:35:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:35:24,864 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2023-02-16 23:35:24,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:35:24,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537086094] [2023-02-16 23:35:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:35:24,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:35:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:35:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 23:35:24,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:35:24,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537086094] [2023-02-16 23:35:24,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537086094] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:35:24,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398496320] [2023-02-16 23:35:24,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:35:24,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:35:24,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:35:24,952 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) [2023-02-16 23:35:24,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 23:35:25,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:35:25,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:35:25,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:35:25,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:35:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 23:35:25,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:35:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 23:35:25,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398496320] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:35:25,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:35:25,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-16 23:35:25,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875015465] [2023-02-16 23:35:25,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:35:25,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 23:35:25,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:35:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 23:35:25,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-16 23:35:25,048 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:35:25,154 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2023-02-16 23:35:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 23:35:25,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-16 23:35:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:35:25,156 INFO L225 Difference]: With dead ends: 123 [2023-02-16 23:35:25,156 INFO L226 Difference]: Without dead ends: 83 [2023-02-16 23:35:25,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-02-16 23:35:25,157 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:35:25,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 22 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:35:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-16 23:35:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2023-02-16 23:35:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-02-16 23:35:25,162 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2023-02-16 23:35:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:35:25,162 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-02-16 23:35:25,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:35:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-02-16 23:35:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-16 23:35:25,163 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:35:25,163 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:35:25,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 23:35:25,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:35:25,368 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:35:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:35:25,369 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2023-02-16 23:35:25,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:35:25,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144647075] [2023-02-16 23:35:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:35:25,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:35:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:35:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:35:28,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:35:28,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144647075] [2023-02-16 23:35:28,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144647075] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:35:28,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681217592] [2023-02-16 23:35:28,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 23:35:28,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:35:28,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:35:28,971 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) [2023-02-16 23:35:28,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 23:35:29,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 23:35:29,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:35:29,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 105 conjunts are in the unsatisfiable core [2023-02-16 23:35:29,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:35:45,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 23:35:45,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:35:45,665 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 43 treesize of output 44 [2023-02-16 23:35:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:35:46,064 INFO L328 TraceCheckSpWp]: Computing backward predicates...