./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 19:53:41,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 19:53:41,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 19:53:41,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 19:53:41,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 19:53:41,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 19:53:41,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 19:53:41,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 19:53:41,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 19:53:41,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 19:53:41,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 19:53:41,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 19:53:41,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 19:53:41,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 19:53:41,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 19:53:41,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 19:53:41,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 19:53:41,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 19:53:41,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 19:53:41,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 19:53:41,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 19:53:41,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 19:53:41,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 19:53:41,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 19:53:41,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 19:53:41,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 19:53:41,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 19:53:41,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 19:53:41,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 19:53:41,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 19:53:41,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 19:53:41,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 19:53:41,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 19:53:41,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 19:53:41,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 19:53:41,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 19:53:41,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 19:53:41,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 19:53:41,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 19:53:41,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 19:53:41,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 19:53:41,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 19:53:41,840 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 19:53:41,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 19:53:41,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 19:53:41,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 19:53:41,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 19:53:41,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 19:53:41,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 19:53:41,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 19:53:41,846 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 19:53:41,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 19:53:41,846 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 19:53:41,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 19:53:41,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 19:53:41,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 19:53:41,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 19:53:41,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 19:53:41,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 19:53:41,848 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 19:53:41,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 19:53:41,848 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 19:53:41,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 19:53:41,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 19:53:41,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 19:53:41,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 19:53:41,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 19:53:41,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 19:53:41,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 19:53:41,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 19:53:41,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 19:53:41,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 19:53:41,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 19:53:41,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 19:53:41,850 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 19:53:41,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 19:53:41,851 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 19:53:41,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2023-02-18 19:53:42,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 19:53:42,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 19:53:42,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 19:53:42,039 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 19:53:42,039 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 19:53:42,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_rec.c [2023-02-18 19:53:42,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 19:53:43,137 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 19:53:43,137 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2023-02-18 19:53:43,141 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/006373ac2/50d1a7b17c804871b07061ef2728d4d7/FLAG6da77f9ed [2023-02-18 19:53:43,153 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/006373ac2/50d1a7b17c804871b07061ef2728d4d7 [2023-02-18 19:53:43,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 19:53:43,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 19:53:43,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 19:53:43,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 19:53:43,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 19:53:43,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103ee77f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43, skipping insertion in model container [2023-02-18 19:53:43,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 19:53:43,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 19:53:43,261 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/verifythis/prefixsum_rec.c[525,538] [2023-02-18 19:53:43,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 19:53:43,283 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 19:53:43,290 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/verifythis/prefixsum_rec.c[525,538] [2023-02-18 19:53:43,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 19:53:43,308 INFO L208 MainTranslator]: Completed translation [2023-02-18 19:53:43,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43 WrapperNode [2023-02-18 19:53:43,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 19:53:43,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 19:53:43,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 19:53:43,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 19:53:43,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,332 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-02-18 19:53:43,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 19:53:43,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 19:53:43,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 19:53:43,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 19:53:43,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,360 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 19:53:43,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 19:53:43,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 19:53:43,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 19:53:43,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (1/1) ... [2023-02-18 19:53:43,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 19:53:43,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:53:43,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 19:53:43,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 19:53:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 19:53:43,426 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 19:53:43,426 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 19:53:43,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 19:53:43,426 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2023-02-18 19:53:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2023-02-18 19:53:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 19:53:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 19:53:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2023-02-18 19:53:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2023-02-18 19:53:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 19:53:43,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 19:53:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 19:53:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-02-18 19:53:43,428 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-02-18 19:53:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 19:53:43,505 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 19:53:43,506 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 19:53:43,689 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 19:53:43,695 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 19:53:43,695 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 19:53:43,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:53:43 BoogieIcfgContainer [2023-02-18 19:53:43,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 19:53:43,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 19:53:43,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 19:53:43,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 19:53:43,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 07:53:43" (1/3) ... [2023-02-18 19:53:43,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325f5733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:53:43, skipping insertion in model container [2023-02-18 19:53:43,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:53:43" (2/3) ... [2023-02-18 19:53:43,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325f5733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:53:43, skipping insertion in model container [2023-02-18 19:53:43,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:53:43" (3/3) ... [2023-02-18 19:53:43,702 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2023-02-18 19:53:43,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 19:53:43,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 19:53:43,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 19:53:43,750 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;@1f13f9ee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 19:53:43,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 19:53:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:53:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 19:53:43,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:53:43,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:53:43,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:53:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:53:43,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1639330660, now seen corresponding path program 1 times [2023-02-18 19:53:43,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:53:43,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291876433] [2023-02-18 19:53:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:53:43,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:53:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:43,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 19:53:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:43,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 19:53:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:43,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-18 19:53:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-18 19:53:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 19:53:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 19:53:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 19:53:44,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:53:44,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291876433] [2023-02-18 19:53:44,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291876433] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 19:53:44,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 19:53:44,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 19:53:44,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70107592] [2023-02-18 19:53:44,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 19:53:44,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 19:53:44,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:53:44,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 19:53:44,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 19:53:44,093 INFO L87 Difference]: Start difference. First operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 19:53:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:53:44,156 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2023-02-18 19:53:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 19:53:44,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2023-02-18 19:53:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:53:44,163 INFO L225 Difference]: With dead ends: 96 [2023-02-18 19:53:44,163 INFO L226 Difference]: Without dead ends: 46 [2023-02-18 19:53:44,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 19:53:44,167 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 19:53:44,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 85 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 19:53:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-18 19:53:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-02-18 19:53:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:53:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2023-02-18 19:53:44,196 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 44 [2023-02-18 19:53:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:53:44,196 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2023-02-18 19:53:44,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 19:53:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2023-02-18 19:53:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 19:53:44,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:53:44,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:53:44,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 19:53:44,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:53:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:53:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1439199646, now seen corresponding path program 1 times [2023-02-18 19:53:44,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:53:44,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543508718] [2023-02-18 19:53:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:53:44,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:53:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 19:53:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 19:53:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-18 19:53:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-18 19:53:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 19:53:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 19:53:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 19:53:44,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:53:44,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543508718] [2023-02-18 19:53:44,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543508718] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 19:53:44,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 19:53:44,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 19:53:44,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635245629] [2023-02-18 19:53:44,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 19:53:44,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 19:53:44,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:53:44,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 19:53:44,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 19:53:44,417 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 19:53:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:53:44,487 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2023-02-18 19:53:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 19:53:44,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2023-02-18 19:53:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:53:44,488 INFO L225 Difference]: With dead ends: 59 [2023-02-18 19:53:44,488 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 19:53:44,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 19:53:44,490 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 19:53:44,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 185 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 19:53:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 19:53:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2023-02-18 19:53:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:53:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-02-18 19:53:44,496 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 44 [2023-02-18 19:53:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:53:44,497 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-02-18 19:53:44,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 19:53:44,497 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-02-18 19:53:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 19:53:44,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:53:44,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:53:44,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 19:53:44,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:53:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:53:44,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1012024996, now seen corresponding path program 1 times [2023-02-18 19:53:44,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:53:44,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390933959] [2023-02-18 19:53:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:53:44,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:53:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 19:53:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 19:53:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-18 19:53:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-18 19:53:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-18 19:53:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-18 19:53:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 19:53:44,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:53:44,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390933959] [2023-02-18 19:53:44,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390933959] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:53:44,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836401299] [2023-02-18 19:53:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:53:44,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:53:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:53:44,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:53:44,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 19:53:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 19:53:44,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:53:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 19:53:44,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:53:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 19:53:44,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836401299] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 19:53:44,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 19:53:44,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-02-18 19:53:44,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906697547] [2023-02-18 19:53:44,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 19:53:44,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 19:53:44,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:53:44,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 19:53:44,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-02-18 19:53:44,835 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 19:53:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:53:44,936 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-02-18 19:53:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 19:53:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2023-02-18 19:53:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:53:44,937 INFO L225 Difference]: With dead ends: 73 [2023-02-18 19:53:44,937 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 19:53:44,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-02-18 19:53:44,938 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 36 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 19:53:44,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 244 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 19:53:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 19:53:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-02-18 19:53:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:53:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-02-18 19:53:44,944 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 46 [2023-02-18 19:53:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:53:44,944 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-02-18 19:53:44,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 19:53:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-02-18 19:53:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 19:53:44,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:53:44,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:53:44,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 19:53:45,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:53:45,151 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:53:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:53:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1298139546, now seen corresponding path program 2 times [2023-02-18 19:53:45,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:53:45,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806501006] [2023-02-18 19:53:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:53:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:53:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:46,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 19:53:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:46,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 19:53:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:46,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-18 19:53:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:46,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-18 19:53:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:46,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-18 19:53:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:46,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-18 19:53:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:53:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 19:53:46,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:53:46,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806501006] [2023-02-18 19:53:46,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806501006] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:53:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530449954] [2023-02-18 19:53:46,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 19:53:46,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:53:46,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:53:46,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:53:46,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 19:53:46,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 19:53:46,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:53:46,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-18 19:53:46,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:53:46,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-18 19:53:46,745 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_123 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|)) (.cse1 (+ |c_downsweep_#in~a.offset| (* 4 |c_downsweep_#in~right|)))) (store (store .cse0 .cse1 v_ArrVal_123) (+ |c_downsweep_#in~a.offset| (* 4 |c_downsweep_#in~left|)) (select .cse0 .cse1)))))) is different from true [2023-02-18 19:53:46,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 19:53:46,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 70 [2023-02-18 19:53:47,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 19:53:47,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 1432 treesize of output 4958