./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/loop-crafted/simple_array_index_value_4.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 6604dbb2462dfab53c0d37d83d08add09bc53abffb53773fd7099f9e7acddff3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:03:46,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:03:46,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:03:46,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:03:46,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:03:46,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:03:46,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:03:46,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:03:46,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:03:46,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:03:46,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:03:46,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:03:46,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:03:46,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:03:46,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:03:46,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:03:46,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:03:46,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:03:46,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:03:46,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:03:46,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:03:46,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:03:46,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:03:46,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:03:46,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:03:46,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:03:46,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:03:46,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:03:46,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:03:46,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:03:46,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:03:46,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:03:46,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:03:46,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:03:46,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:03:46,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:03:46,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:03:46,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:03:46,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:03:46,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:03:46,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:03:46,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:03:46,647 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:03:46,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:03:46,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:03:46,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:03:46,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:03:46,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:03:46,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:03:46,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:03:46,650 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:03:46,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:03:46,650 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:03:46,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:03:46,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:03:46,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:03:46,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:03:46,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:03:46,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:03:46,651 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:03:46,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:03:46,651 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:03:46,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:03:46,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:03:46,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:03:46,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:03:46,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:03:46,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:03:46,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:03:46,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:03:46,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:03:46,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:03:46,653 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:03:46,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:03:46,653 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:03:46,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:03:46,654 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:03:46,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6604dbb2462dfab53c0d37d83d08add09bc53abffb53773fd7099f9e7acddff3 [2023-02-15 20:03:46,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:03:46,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:03:46,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:03:46,861 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:03:46,861 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:03:46,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_4.i [2023-02-15 20:03:47,861 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:03:48,029 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:03:48,030 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_4.i [2023-02-15 20:03:48,034 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbef9e2f9/c0ce81bfc00a4b21a0d824a303418bbe/FLAG66555b6d9 [2023-02-15 20:03:48,050 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbef9e2f9/c0ce81bfc00a4b21a0d824a303418bbe [2023-02-15 20:03:48,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:03:48,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:03:48,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:03:48,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:03:48,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:03:48,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49930a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48, skipping insertion in model container [2023-02-15 20:03:48,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:03:48,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:03:48,169 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/loop-crafted/simple_array_index_value_4.i[919,932] [2023-02-15 20:03:48,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:03:48,189 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:03:48,200 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/loop-crafted/simple_array_index_value_4.i[919,932] [2023-02-15 20:03:48,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:03:48,225 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:03:48,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48 WrapperNode [2023-02-15 20:03:48,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:03:48,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:03:48,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:03:48,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:03:48,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,254 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 64 [2023-02-15 20:03:48,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:03:48,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:03:48,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:03:48,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:03:48,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,268 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:03:48,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:03:48,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:03:48,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:03:48,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (1/1) ... [2023-02-15 20:03:48,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:03:48,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:48,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 20:03:48,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 20:03:48,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:03:48,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 20:03:48,317 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 20:03:48,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:03:48,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 20:03:48,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 20:03:48,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:03:48,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:03:48,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 20:03:48,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 20:03:48,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 20:03:48,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 20:03:48,364 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:03:48,366 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:03:48,468 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:03:48,472 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:03:48,472 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 20:03:48,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:03:48 BoogieIcfgContainer [2023-02-15 20:03:48,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:03:48,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:03:48,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:03:48,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:03:48,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:03:48" (1/3) ... [2023-02-15 20:03:48,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2ce64c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:03:48, skipping insertion in model container [2023-02-15 20:03:48,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:48" (2/3) ... [2023-02-15 20:03:48,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2ce64c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:03:48, skipping insertion in model container [2023-02-15 20:03:48,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:03:48" (3/3) ... [2023-02-15 20:03:48,484 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i [2023-02-15 20:03:48,496 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:03:48,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:03:48,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:03:48,573 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;@7c63fc5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:03:48,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:03:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 24 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 20:03:48,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 20:03:48,596 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:48,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:48,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash -116286682, now seen corresponding path program 1 times [2023-02-15 20:03:48,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:48,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124004565] [2023-02-15 20:03:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:48,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:48,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 20:03:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:48,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 20:03:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:03:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:48,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124004565] [2023-02-15 20:03:48,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124004565] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:03:48,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:03:48,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:03:48,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404239655] [2023-02-15 20:03:48,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:03:48,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 20:03:48,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 20:03:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:03:48,892 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 24 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:03:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:48,914 INFO L93 Difference]: Finished difference Result 60 states and 87 transitions. [2023-02-15 20:03:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 20:03:48,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-15 20:03:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:48,922 INFO L225 Difference]: With dead ends: 60 [2023-02-15 20:03:48,923 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 20:03:48,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:03:48,927 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:48,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:03:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 20:03:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-15 20:03:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 20:03:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-02-15 20:03:48,960 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2023-02-15 20:03:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:48,960 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-02-15 20:03:48,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:03:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-02-15 20:03:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 20:03:48,961 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:48,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:48,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 20:03:48,962 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1691769640, now seen corresponding path program 1 times [2023-02-15 20:03:48,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:48,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488277122] [2023-02-15 20:03:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:48,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:49,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 20:03:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:49,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 20:03:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:03:49,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:49,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488277122] [2023-02-15 20:03:49,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488277122] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:49,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874031388] [2023-02-15 20:03:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:49,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:49,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:49,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:03:49,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:03:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:49,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:03:49,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:03:49,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:03:49,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874031388] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:03:49,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:03:49,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2023-02-15 20:03:49,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665710026] [2023-02-15 20:03:49,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:03:49,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 20:03:49,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 20:03:49,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:03:49,303 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:03:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:49,405 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-02-15 20:03:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 20:03:49,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-02-15 20:03:49,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:49,408 INFO L225 Difference]: With dead ends: 37 [2023-02-15 20:03:49,408 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 20:03:49,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:03:49,410 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:49,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 100 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:03:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 20:03:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2023-02-15 20:03:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 20:03:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-15 20:03:49,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2023-02-15 20:03:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:49,424 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-15 20:03:49,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:03:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-15 20:03:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 20:03:49,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:49,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:49,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 20:03:49,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:49,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:49,634 INFO L85 PathProgramCache]: Analyzing trace with hash -789252821, now seen corresponding path program 1 times [2023-02-15 20:03:49,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:49,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833674095] [2023-02-15 20:03:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:49,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:49,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 20:03:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:49,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 20:03:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:03:49,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:49,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833674095] [2023-02-15 20:03:49,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833674095] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:49,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815441362] [2023-02-15 20:03:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:49,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:49,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:49,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:03:49,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:03:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:49,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 20:03:49,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 20:03:49,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:03:49,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815441362] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:03:49,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:03:49,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 20:03:49,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860647968] [2023-02-15 20:03:49,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:03:49,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 20:03:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 20:03:49,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:03:49,803 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:03:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:49,809 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-02-15 20:03:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 20:03:49,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-15 20:03:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:49,810 INFO L225 Difference]: With dead ends: 47 [2023-02-15 20:03:49,810 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 20:03:49,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:03:49,811 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:49,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 56 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:03:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 20:03:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-02-15 20:03:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 20:03:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-15 20:03:49,817 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2023-02-15 20:03:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:49,818 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-15 20:03:49,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 20:03:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-15 20:03:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 20:03:49,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:49,820 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:49,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:03:50,027 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,SelfDestructingSolverStorable2 [2023-02-15 20:03:50,027 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash -960235027, now seen corresponding path program 1 times [2023-02-15 20:03:50,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:50,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349055238] [2023-02-15 20:03:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:50,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 20:03:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 20:03:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 20:03:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 20:03:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 20:03:50,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:50,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349055238] [2023-02-15 20:03:50,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349055238] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:50,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788903505] [2023-02-15 20:03:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:50,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:50,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:50,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:03:50,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:03:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:03:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:03:50,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:03:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 20:03:50,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788903505] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:03:50,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:03:50,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 20:03:50,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555957558] [2023-02-15 20:03:50,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:03:50,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 20:03:50,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:50,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 20:03:50,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:03:50,233 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-15 20:03:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:50,269 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2023-02-15 20:03:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:03:50,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 37 [2023-02-15 20:03:50,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:50,272 INFO L225 Difference]: With dead ends: 67 [2023-02-15 20:03:50,272 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 20:03:50,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:03:50,274 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:50,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:03:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 20:03:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-15 20:03:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 20:03:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-02-15 20:03:50,287 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 37 [2023-02-15 20:03:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:50,287 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-02-15 20:03:50,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-15 20:03:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-02-15 20:03:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:03:50,289 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:50,289 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:50,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:03:50,496 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 [2023-02-15 20:03:50,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2084528089, now seen corresponding path program 2 times [2023-02-15 20:03:50,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:50,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483024202] [2023-02-15 20:03:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 20:03:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 20:03:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 20:03:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 20:03:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 20:03:50,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:50,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483024202] [2023-02-15 20:03:50,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483024202] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:50,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457578480] [2023-02-15 20:03:50,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:03:50,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:50,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:50,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:03:50,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:03:50,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:03:50,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:03:50,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 20:03:50,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:03:50,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:03:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 20:03:50,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457578480] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:03:50,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:03:50,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 20:03:50,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628030692] [2023-02-15 20:03:50,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:03:50,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 20:03:50,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 20:03:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:03:50,836 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-15 20:03:51,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:51,129 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2023-02-15 20:03:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 20:03:51,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2023-02-15 20:03:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:51,132 INFO L225 Difference]: With dead ends: 79 [2023-02-15 20:03:51,132 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 20:03:51,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:03:51,132 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:51,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 254 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:03:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 20:03:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-15 20:03:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 20:03:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-02-15 20:03:51,137 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 43 [2023-02-15 20:03:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:51,137 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-02-15 20:03:51,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-15 20:03:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-02-15 20:03:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:03:51,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:51,138 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:51,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 20:03:51,343 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 [2023-02-15 20:03:51,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:51,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:51,343 INFO L85 PathProgramCache]: Analyzing trace with hash -46837221, now seen corresponding path program 3 times [2023-02-15 20:03:51,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:51,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110150021] [2023-02-15 20:03:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:51,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:51,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 20:03:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:51,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 20:03:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:51,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 20:03:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:51,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 20:03:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 20:03:51,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:51,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110150021] [2023-02-15 20:03:51,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110150021] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:51,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174769572] [2023-02-15 20:03:51,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:03:51,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:51,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:51,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:03:51,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:03:51,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 20:03:51,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:03:51,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:03:51,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:52,079 INFO L321 Elim1Store]: treesize reduction 120, result has 5.5 percent of original size [2023-02-15 20:03:52,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 120 treesize of output 58 [2023-02-15 20:03:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-02-15 20:03:52,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:03:59,218 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 87 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:03:59,582 INFO L321 Elim1Store]: treesize reduction 171, result has 21.2 percent of original size [2023-02-15 20:03:59,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 336 treesize of output 189 [2023-02-15 20:03:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-02-15 20:03:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174769572] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:03:59,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:03:59,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2023-02-15 20:03:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90501691] [2023-02-15 20:03:59,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:03:59,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 20:03:59,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 20:03:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 20:03:59,952 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 34 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 7 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-15 20:04:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:04:01,381 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-02-15 20:04:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:04:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 7 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 55 [2023-02-15 20:04:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:04:01,385 INFO L225 Difference]: With dead ends: 89 [2023-02-15 20:04:01,385 INFO L226 Difference]: Without dead ends: 0 [2023-02-15 20:04:01,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 20:04:01,387 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:04:01,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 235 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 20:04:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-15 20:04:01,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-15 20:04:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-02-15 20:04:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-15 20:04:01,388 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2023-02-15 20:04:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:04:01,388 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 20:04:01,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 7 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-15 20:04:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-15 20:04:01,388 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-15 20:04:01,390 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 20:04:01,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 20:04:01,595 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 [2023-02-15 20:04:01,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-15 20:04:01,758 INFO L899 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2023-02-15 20:04:01,758 INFO L895 garLoopResultBuilder]: At program point L40-3(lines 40 42) the Hoare annotation is: (= |ULTIMATE.start_main_~loop_entered~0#1| 0) [2023-02-15 20:04:01,758 INFO L899 garLoopResultBuilder]: For program point L40-4(lines 40 42) no Hoare annotation was computed. [2023-02-15 20:04:01,758 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-15 20:04:01,758 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-15 20:04:01,758 INFO L899 garLoopResultBuilder]: For program point L57(lines 57 63) no Hoare annotation was computed. [2023-02-15 20:04:01,758 INFO L895 garLoopResultBuilder]: At program point L49-1(lines 49 55) the Hoare annotation is: (or (let ((.cse1 (mod (+ |ULTIMATE.start_main_~index1~0#1| 4294967295) 4294967296)) (.cse2 (mod (+ |ULTIMATE.start_main_~index2~0#1| 1) 4294967296))) (and (let ((.cse0 (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|))) (= (mod (select .cse0 (+ (* .cse1 4) |ULTIMATE.start_main_~#array~0#1.offset|)) 4294967296) (mod (select .cse0 (+ (* .cse2 4) |ULTIMATE.start_main_~#array~0#1.offset|)) 4294967296))) (< .cse1 .cse2) (< .cse2 100000))) (and (= |ULTIMATE.start_main_~loop_entered~0#1| 0) (< (mod |ULTIMATE.start_main_~index2~0#1| 4294967296) 100000))) [2023-02-15 20:04:01,758 INFO L899 garLoopResultBuilder]: For program point L49-2(lines 34 65) no Hoare annotation was computed. [2023-02-15 20:04:01,758 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (= |ULTIMATE.start_main_~loop_entered~0#1| 0) [2023-02-15 20:04:01,758 INFO L899 garLoopResultBuilder]: For program point L45-1(line 45) no Hoare annotation was computed. [2023-02-15 20:04:01,758 INFO L899 garLoopResultBuilder]: For program point L33(lines 33 65) no Hoare annotation was computed. [2023-02-15 20:04:01,758 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L895 garLoopResultBuilder]: At program point L58-2(lines 58 62) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|))) (or (let ((.cse1 (mod (+ |ULTIMATE.start_main_~index1~0#1| 4294967295) 4294967296)) (.cse2 (mod (+ |ULTIMATE.start_main_~index2~0#1| 1) 4294967296))) (and (= (mod (select .cse0 (+ (* .cse1 4) |ULTIMATE.start_main_~#array~0#1.offset|)) 4294967296) (mod (select .cse0 (+ (* .cse2 4) |ULTIMATE.start_main_~#array~0#1.offset|)) 4294967296)) (< .cse1 .cse2) (< .cse2 100000))) (let ((.cse3 (mod |ULTIMATE.start_main_~index1~0#1| 4294967296)) (.cse4 (mod |ULTIMATE.start_main_~index2~0#1| 4294967296))) (and (< .cse3 .cse4) (= (mod (select .cse0 (+ (* .cse3 4) |ULTIMATE.start_main_~#array~0#1.offset|)) 4294967296) (mod (select .cse0 (+ (* .cse4 4) |ULTIMATE.start_main_~#array~0#1.offset|)) 4294967296)) (< .cse4 100000))))) [2023-02-15 20:04:01,759 INFO L895 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (mod |ULTIMATE.start_main_~index2~0#1| 4294967296))) (and (< (mod |ULTIMATE.start_main_~index1~0#1| 4294967296) .cse0) (< .cse0 100000))) [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point L50-1(line 50) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L895 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: (let ((.cse1 (mod (+ |ULTIMATE.start_main_~index1~0#1| 4294967295) 4294967296)) (.cse2 (mod (+ |ULTIMATE.start_main_~index2~0#1| 1) 4294967296))) (and (let ((.cse0 (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|))) (= (mod (select .cse0 (+ (* .cse1 4) |ULTIMATE.start_main_~#array~0#1.offset|)) 4294967296) (mod (select .cse0 (+ (* .cse2 4) |ULTIMATE.start_main_~#array~0#1.offset|)) 4294967296))) (< .cse1 .cse2) (< .cse2 100000) (= (mod (+ (* |ULTIMATE.start_main_#t~mem10#1| 4294967295) |ULTIMATE.start_main_#t~mem9#1|) 4294967296) 0))) [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point L59-1(line 59) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L895 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse2 (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|)) (.cse0 (mod |ULTIMATE.start_main_~index1~0#1| 4294967296)) (.cse1 (mod |ULTIMATE.start_main_~index2~0#1| 4294967296))) (and (< .cse0 .cse1) (= |ULTIMATE.start_main_#t~mem6#1| (select .cse2 (+ (* .cse1 4) |ULTIMATE.start_main_~#array~0#1.offset|))) (= |ULTIMATE.start_main_#t~mem5#1| (select .cse2 (+ (* .cse0 4) |ULTIMATE.start_main_~#array~0#1.offset|))) (< .cse1 100000))) [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point L51-1(line 51) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L895 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (= |ULTIMATE.start_main_~loop_entered~0#1| 0) [2023-02-15 20:04:01,759 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 20 22) the Hoare annotation is: true [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point L21(line 21) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point L21-2(lines 20 22) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 20 22) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 23 29) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 23 29) the Hoare annotation is: true [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point L25(lines 25 27) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point L25-2(lines 23 29) no Hoare annotation was computed. [2023-02-15 20:04:01,759 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2023-02-15 20:04:01,761 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2023-02-15 20:04:01,763 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 20:04:01,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 08:04:01 BoogieIcfgContainer [2023-02-15 20:04:01,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 20:04:01,789 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 20:04:01,789 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 20:04:01,790 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 20:04:01,790 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:03:48" (3/4) ... [2023-02-15 20:04:01,792 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-15 20:04:01,798 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2023-02-15 20:04:01,798 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-02-15 20:04:01,802 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2023-02-15 20:04:01,802 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-02-15 20:04:01,802 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-02-15 20:04:01,803 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-15 20:04:01,827 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 20:04:01,827 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 20:04:01,827 INFO L158 Benchmark]: Toolchain (without parser) took 13774.25ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 103.8MB in the beginning and 113.7MB in the end (delta: -9.9MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2023-02-15 20:04:01,828 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 104.9MB. Free memory was 58.8MB in the beginning and 58.6MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 20:04:01,828 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.17ms. Allocated memory is still 134.2MB. Free memory was 103.3MB in the beginning and 93.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 20:04:01,828 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.07ms. Allocated memory is still 134.2MB. Free memory was 93.0MB in the beginning and 91.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 20:04:01,828 INFO L158 Benchmark]: Boogie Preprocessor took 15.63ms. Allocated memory is still 134.2MB. Free memory was 91.4MB in the beginning and 89.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 20:04:01,829 INFO L158 Benchmark]: RCFGBuilder took 202.83ms. Allocated memory is still 134.2MB. Free memory was 89.8MB in the beginning and 78.4MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 20:04:01,829 INFO L158 Benchmark]: TraceAbstraction took 13314.31ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 77.7MB in the beginning and 116.8MB in the end (delta: -39.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 20:04:01,829 INFO L158 Benchmark]: Witness Printer took 37.81ms. Allocated memory is still 161.5MB. Free memory was 116.8MB in the beginning and 113.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 20:04:01,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 104.9MB. Free memory was 58.8MB in the beginning and 58.6MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 171.17ms. Allocated memory is still 134.2MB. Free memory was 103.3MB in the beginning and 93.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.07ms. Allocated memory is still 134.2MB. Free memory was 93.0MB in the beginning and 91.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.63ms. Allocated memory is still 134.2MB. Free memory was 91.4MB in the beginning and 89.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 202.83ms. Allocated memory is still 134.2MB. Free memory was 89.8MB in the beginning and 78.4MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 13314.31ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 77.7MB in the beginning and 116.8MB in the end (delta: -39.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 37.81ms. Allocated memory is still 161.5MB. Free memory was 116.8MB in the beginning and 113.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 26]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.2s, OverallIterations: 6, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 46 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40 mSDsluCounter, 855 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 687 mSDsCounter, 30 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1101 IncrementalHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 30 mSolverCounterUnsat, 168 mSDtfsCounter, 1101 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 394 GetRequests, 316 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=5, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 36 PreInvPairs, 58 NumberOfFragments, 273 HoareAnnotationTreeSize, 36 FomulaSimplifications, 186 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 262 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 382 NumberOfCodeBlocks, 358 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 503 ConstructedInterpolants, 3 QuantifiedInterpolants, 2717 SizeOfPredicates, 20 NumberOfNonLiveVariables, 506 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 355/510 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: loop_entered == 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((unknown-#memory_int-unknown[array][(index1 + 4294967295) % 4294967296 * 4 + array] % 4294967296 == unknown-#memory_int-unknown[array][(index2 + 1) % 4294967296 * 4 + array] % 4294967296 && (index1 + 4294967295) % 4294967296 < (index2 + 1) % 4294967296) && (index2 + 1) % 4294967296 < 100000) || (loop_entered == 0 && index2 % 4294967296 < 100000) - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: ((unknown-#memory_int-unknown[array][(index1 + 4294967295) % 4294967296 * 4 + array] % 4294967296 == unknown-#memory_int-unknown[array][(index2 + 1) % 4294967296 * 4 + array] % 4294967296 && (index1 + 4294967295) % 4294967296 < (index2 + 1) % 4294967296) && (index2 + 1) % 4294967296 < 100000) || ((index1 % 4294967296 < index2 % 4294967296 && unknown-#memory_int-unknown[array][index1 % 4294967296 * 4 + array] % 4294967296 == unknown-#memory_int-unknown[array][index2 % 4294967296 * 4 + array] % 4294967296) && index2 % 4294967296 < 100000) RESULT: Ultimate proved your program to be correct! [2023-02-15 20:04:01,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE